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KAWASAKI SERVICE BULLETIN INDEX BK117

KAWASAKI BK117 · Service Bulletins

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Overview

This document is a service bulletin index for the Kawasaki BK117 helicopter, detailing various modifications, inspections, and replacements that have been issued over time. It includes information on the effectiveness of each bulletin and the specific aircraft serial numbers to which they apply.

  • The document lists service bulletins from KSB-117-001 to KSB-117-103.
  • Modifications include engine oil system changes and cargo hook mechanisms.
  • Several bulletins have been cancelled and incorporated into the manual.
  • The maximum approved takeoff gross weight has been modified in some configurations.
  • Inspections are required for various components, including tail rotor and hydraulic systems.
  • Some bulletins address improvements in safety and operational efficiency.
  • The document is dated 18 February 2021.
  • Specific parts and serial numbers are referenced for compliance.

Document

Source

Originally published by bk117.com. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.

View original at bk117.com

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Document details

Type
·
Service Bulletins
Year
·
2021
File size
·
312 KB
Publisher
·
bk117.com
Language
·
en

Specifications & performance

Extracted from this document.

Specifications

Max gross weight kg
·
3350
Max takeoff weight kg
·
3200
About this document
What is the KAWASAKI SERVICE BULLETIN INDEX BK117?

The KAWASAKI SERVICE BULLETIN INDEX BK117 is a service bulletins for the KAWASAKI BK117, dated 2021.

Where does the KAWASAKI SERVICE BULLETIN INDEX BK117 come from?

This copy of the KAWASAKI SERVICE BULLETIN INDEX BK117 was originally published by bk117.com and is hosted on Sprinkle as a free, searchable reference copy.

What year was the KAWASAKI SERVICE BULLETIN INDEX BK117 published?

The KAWASAKI SERVICE BULLETIN INDEX BK117 — the KAWASAKI BK117 service bulletins on file — is dated 2021.

Documentation completeness
1/7

Most owners only have the POH. Here's the essential set for the KAWASAKI BK117.

  • Pilot's Operating Handbook / AFM
  • Checklist
  • Maintenance Manual
  • Parts Catalog (IPC)
  • Systems & Wiring
  • Service Bulletins on file
  • Type Certificate (TCDS)
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In this document

Service Bulletin Index

A comprehensive list of service bulletins issued for the Kawasaki BK117, including dates, subjects, and effectiveness.

Modifications

Details modifications made to the helicopter, including engine oil system and cargo hook mechanisms.

Inspections

Outlines required inspections for various components to ensure safety and compliance.

Cancelled Bulletins

Lists bulletins that have been cancelled and incorporated into the main manual.

Weight Modifications

Information on changes to the maximum approved takeoff gross weight for different configurations.

Safety Improvements

Bulletins that focus on enhancing safety and operational efficiency of the helicopter.

Full document text

ＫＡＷＡＳＡＫＩ ＳＥＲＶＩＣＥ ＢＵＬＬＥＴＩＮ ＩＮＤＥＸ ＢＫ１１７ 18.February.2021 Ｎｏ． ＤＡＴＥ ＳＵＢＪＥＣＴ ＣＡＴ ＳＹＳ EFFECTIVITＹ Aicraft Serial No. ＲＥＭＡＲＫＳ KSB-117-001 17.Jul.'97 Modification-Engine Oil System D 60 1001～1003 KSB-117-002 Not Applicable KSB-117-003 27.Sep.'84 Installation of Protective Covers P/N 117-81185-01 for Dual Control System D 100 － All a/c equipped with dual pilot kit KSB-117-004 Not Applicable KSB-117-005 Not Applicable KSB-117-006 Not Applicable KSB-117-007 Not Applicable KSB-117-008 Not Applicable KSB-117-009 10.Dec.'84 Modification of Manual Release Mechanism of Cargo Hook M 100 － Hook P/N S1609-1-117A TCD-2421-85 TCD-2421-1-85 KSB-117-010 Not Applicable KSB-117-011 3.Apr.'85 Replacement of Fluid Level Indicator of Hydraulic Reservoir E 40 － Hyd.unit 117-45020V001 KSB-117-012 17.Jul.'97 Expansion of Generator Limitation O 90 1001～1003&1005 KSB-117-013 23.Jul.'86 Replacement of Battery Vent Hoses O 90 1001～1006&1008～1013 KSB-117-014 30.Oct.'85 Reidentification of Retirement-Life-Limitation Parts of Lifting System E 10 1001～1006&1008～1013 KSB-117-015 23.Jul.'86 Replacement of Current Generator Control Panels(GCP） with Improved-Type GCPS D 90 1001～1006,1008&1009 KSB-117-016A 25.Jul.'85 Restriction of Never Exeed Speeds(VNE) Cancelled. Incorporated in manual KSB-117-017 1.Mar.'85 Inspection of Tail Rotor Pitch Link Length Cancelled. Incorporated in manual KSB-117-018 23.Jul.'86 Replacement of Wiper Blade Wiping Elements O 70 1001～1006&1008～1013 KSB-117-019 13.May.'86 Substitute for Pyrotechnic Pistol(Type-K/No.1) D 70 1001～1006&1008～1013 KSB-117-020A 19.Jun.'91 Modification of KAWASAKI BK117 Helicopter (Max.Approved Takeoff Gross Weight:2850kg) to KAWASAKI BK117 A-3 Configuration (Max.Approved Takeoff Gross Weight:3200kg) O － 1001～1006&1008～1013 KSB-117-021 15.May.'86 Reinforcement of Tail Skid Forward Attachment Area D 30 1001～1003,1006,1008,1009＆1011 KSB-117-022 18.Feb.'88 Replacement-Goosenecks and Hinge Supports of Main Transmission Cowling Access Doors Cancelled. Completed KSB-117-023A 6.jul.'90 Installation of Refueling Kit O 60 1001～1006&1008～1013 KSB-117-024 24.Oct.'87 Improvement of Printed Wiring Board Installation D 90 1001～1006&1008～1013 KSB-117-025 18.Nov.'86 Inspection of Cockpit Door and Cabin Door Handles for Installation Condition Cancelled. Completed KSB-117-026 24.Oct.'87 Diode Installation in Hydraulic and Heating Systems D 90 1001～1006 KSB-117-027B 5.Jul.'90 Tail Rotor Blade-Inspection of Erosion Protective Shell or Replacement of Tail Rotor Blades with New parts M 30 BK117 series except model BK117 TCD-2589-2-90 KSB-117-028B 6.Jul.'90 Installation of Stick position Augmentation System(SPAS) and AC Power System O 40 1001～1006&1008～1013 KSB-117-029 7.Oct.'86 Modification of Wiper Blade Attachment to Constant Pressure Arm Cancelled. Incorporated in manual KSB-117-030 7.Oct.'86 Modification of Main Rotor Shaft Boot Installation Cancelled. Incorporated in manual KSB-117-031 18.Nov.'86 Reinforcement of Seal Covers and Improvement of Seal Box Draining Means D 60 1001～1006&1008～1013 KSB-117-032 18.Aug.'86 Replacement of Tail Rotor Gearbox Attaching Bolts Cancelled. Incorporated in manual KSB-117-033 30.May.'87 Prevention of Improper Connection of Electrical Connectors for Pressure Switches by Color Coding D 90 1001～1006 KSB-117-034B 20.Apr.'04 Inspection of Tail Cone Frame(STA 6616)and Repair of Cracks E 20 Except for Model C-2 KSB-117-035A 30.Jun.'87 Dimensional Inspection-check Valve of Engine Fire Extinguishing System M 60 1001～1006 &1008～1014 TCD-2651-1-87 KSB-117-036 24.Oct.'87 Alternation of Latch Spring Installation for Hydrauric Compartment Cowling(Crest Cowling) Cancelled. Incorporated in manual KSB-117-037 Blank KSB-117-038 2.Jun.'88 Installation of Engine Water Washing Kit O 100 All 1 / 12 ＫＡＷＡＳＡＫＩ ＳＥＲＶＩＣＥ ＢＵＬＬＥＴＩＮ ＩＮＤＥＸ ＢＫ１１７ 18.February.2021 Ｎｏ． ＤＡＴＥ ＳＵＢＪＥＣＴ ＣＡＴ ＳＹＳ EFFECTIVITＹ Aicraft Serial No. ＲＥＭＡＲＫＳ KSB-117-038-1 1.Dec.'95 Ditto KSB-117-039 6.Jul.'90 Inspection of Skid tube Assemblies and Modification of Ground Handling Wheel Console Assemblies D 50 1001～1006,1008～1015&1017 KSB-117-040B 22.Jun.'89 Inspection of Secondary Bolts Attaching Main Rotor Blades to Rotor Head,and Change in Torquing Their Nuts Cancelled. Incorporated in manual KSB-117-041 30.Jun.'87 Modification of KAWASAKI BK117 Helicopter(Max.Approved Takeoff Gross Weight:2850kg)/KAWASAKI BK117 A-3 Helicopopter (Max.Approved Takeoff Gross Weight:3200kg)to KAWASAKI BK117 A-4 Configuration O － 1001～1006&1008～1013 KSB-117-042 25.Feb.'88 Inspection of Vapor Seals Fuel Vent Lines for Deterioration and Their Replacement Cancelled. Completed KSB-117-043 4.Dec.'87 Preventive Actions Against Possible Crack Formation in Rod Ends of Main Rotor System Rotating Control Rods Cancelled. Incorporated in manual KSB-117-044A 6.Jul.'90 Inspection and Replacement of Goosenecks of Ｔｒａｎｓｍｉssion Cowling Ａccess Door Ｈinges E 20 1001～1006&1008～1032 KSB-117-045 31.May.'88 Restrictions of Never-Exceed Speeds(VNE) Cancelled. Incorporated in manual KSB-117-046 Cancelled KSB-117-047 22.Aug.'88 Replacement of Tension Latches of Hydraulic compartment (Crest),Transmission,and Engine Cowling E 20 1001～1006,1008～1015&1017 KSB-117-047-1 12.May.'89 Ditto KSB-117-048B 23.Jun.'92 Retrofit of Engine Chip Detector Test Circuit D 90 1001～1006&1008～1021 KSB-117-049 Blank KSB-117-050 Not Applicable KSB-117-051 9.Jul.'90 Replacement of Turn and Bank Indicator with an Alternative O 90 1002～1006，1008&1010～1013 KSB-117-052 4.Apr.'89 Inspection of Tail Rotor Transmission Mounting Cancelled. Incorporated in manual KSB-117-053 9.Jul.'90 Installation of Instantaneous Vertical Speed Indicator(s) as an Alternative for Current Rate of Climb Indicator(s) O 90 KSB-117-054 1.Nov.'89 Corrosion Prevention of Main Rotor Transmission by Appling Sealing Compound D 10 Main Transmissions S/N KA0101-KA0366 KSB-117-055 Blank KSB-117-056 1.Nov.'89 Modification of Cabin Door Latch Mechanism Assenblies O 20 1001～1006&1008～1024

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KSB-117-057A 29.Jul.'94 Modification of KAWASAKI BK117 A-4 Helicopter to KAWASAKI BK117 B-1 Configuration O － Model A-4 KSB-117-041 KSB-117-057A-1 20.Nov.'95 Ditto KSB-117-058 11.Apr.'90 Installation of Quartz Clock O 90 1001～1006,1008～1024&1026～1029 KSB-117-059 12.Jun.'89 Installation of Aditional Washers on Drive Rod Assembly Attaching Bolts-Main Rotor System E 10 1001～1006，1008～1024&1026～1028 KSB-117-060 25.May.'90 Modification of Cargo Hook Manual Release Mechanism and Application of Caution Placard E 100 Hooks shipped from KHI before July 1,1989 KSB-117-061 6.Jul.'90 Periodoc Inspection and Replacement of Main Rotor Transmission Input Shaft Attaching Bolts Cancelled. Incorporated in manual KSB-117-062 Cancelled KSB-117-063 11.Apr.'90 Retrofit of RBSH Scavenge Debris Monitor(Engine Chip Detector “2”)Test Circuit D 90 1019，1025～1028&1030～1035 KSB-117-064 13.Jun.'90 Staking of Orifice in Elbow Assembly of Each Engine Torque Line D 60 1019～1091 KSB-117-065 9.Oct.'89 Inspection and Replacement of Tail Rotor Drive Shaft Coupling M 30 1001～1006,1008～1024&1026～1031 KSB-117-066 16.May.'90 Modification and Retrofit of Electrical Bonding Jumpers on Landing Gear E 50 1001～1006 &1008～1037 TCD-3374-91 KSB-117-067 Not Applicable KSB-117-068 13.Jun.'90 Rework of Tailppe for Installation of an Engine with Power Turbine Retention System E 60 1001～1006,1008～1024&1026～1031 KSB-117-069 30.Mar.'90 Removal of Fuel Vapor Return Lines Cancelled. Completed KSB-117-070 25.May.'90 Improvement in Maximum Approved Cargo Hook Load Capacity E 100 Hook shipped from KHI before March 1，1990 KSB-117-071 25.May.'90 Improvement in Maximum Approved Hoisting Capacity of Rescue Winch System E 100 Winchs shipped from KHI before March 1，1990 KSB-117-072 17.Apr.'91 Replacement of JAE Relay(P/N 7264-46549)Gasket E 90 (1001～1056) Relays except shipped from KHI on and after Aug 12,1990 KSB-117-073 Blank 1002～1006,1008,1010～1013,1016,1017 &1019～1024 2 / 12 ＫＡＷＡＳＡＫＩ ＳＥＲＶＩＣＥ ＢＵＬＬＥＴＩＮ ＩＮＤＥＸ ＢＫ１１７ 18.February.2021 Ｎｏ． ＤＡＴＥ ＳＵＢＪＥＣＴ ＣＡＴ ＳＹＳ EFFECTIVITＹ Aicraft Serial No. ＲＥＭＡＲＫＳ KSB-117-074 30.Mar.'91 Inspection and Reinforcement of Anti-Collision Light Mount E 30 1001,1009,1015,1018,1025,1037～1039&1048 KSB-117-075 21.May.'91 Improved Coaxal Cable Shielding of Collins VIR-350/VIR-351 VOR Receiver and VHF-250/VHF251 Transceiver D 100 1001～1068 Ｅｑｕｉｐｐｅｄ with Collins nav/comm system KSB-117-076 9.Mar.'92 Installation of Additional Shims to Provide a Means for Proper Adjustment of Clearances between Rotor Brake Linings and Breake Disc Cancelled. Incorporated in manual KSB-117-076-1 20.Jul.'92 Ditto Cancelled. Incorporated in manual KSB-117-077 1.Feb.'91 Retrofit of Static Dischargers and Modification of Electrical Bonding and Fuel Vent Line Outlet Prots M 10 1001～1035 &1037～1066 TCD-3432-91 KSB-117-078 18.Apr.'91 Improvement of Fuel System Electrical Bonding M 60 1001～1072,1074&1075 KSB-117-079 4.Aug.'92 Retrofit of Ground Connector to Fuel Filler Port Grounding Jack to Facilitate Connection of an Alligator Clip Type Ground Connector of Fuel Hose Nozzle O 20 1001～1084,1087～1089&1091～1099 KSB-117-080 18.Apr.'91 Replacement of Fuel Vent Line Hoses and Inner Sleeves E 60 1001～1072,1074&1075 KSB-117-081 5.Jun.'91 Application of Decals to Engine and Transmission Cowling Access Doors near their Latches and Painting on Tension Latch Hooks D 60 1001～1072,1074&1075 KSB-117-082 3.Sep.'91 Inspection of Main Rotor Transmission Mast Spacer Cancelled. Incorporated in manual KSB-117-083 3.Sep.'91 Retrofit of Additional Support Cushions for Engine Ejector Duch Assemblies D 20 1001～1006&1008～1048 KSB-117-084 Not applicable KSB-117-085 Blank KSB-117-086 25.May.'92 Retrofit of Horizontal Stabilizer Fins with from Core Inserts D 30 1001～1091, 1093&1100 Hor.stab. fins P/N 117-30610& P/N 117-30602 KSB-117-086-1 30.Aug.'94 Ditto KSB-117-087 16.Nov.'91 Modification of Tail Rotor Transmission Mounting Cancelled. Completed KSB-117-088 Blank KSB-117-089 23.Jun.'92 Replacement of Wiring Harnesses for Engine Full Flow Chip Detector Test Circuit D 90 1001～1021* &1022～1052 *after copliance with KSB-117- 048A KSB-117-090 10.Jun.'92 Modification of ECS Overheat Awitch O 100 1001～1087, 1093,1097&1100 equipped with ECS KSB-117-091 16.Nov.'91 Replacement of Electrical Bonding Cables between Main Rotor Head and Blades,and their Attaching Brackets;Introduction of an Alternate Main Rotor Blades Static Discharger M 10 1001～1084, 1087,1093&1100 KSB-117-077 KSB-117-092 Blank KSB-117-093 Blank KSB-117-094 7.Sep.'92 Replacement of Each Cabin Door Stopper D 20 1009,1014～1084,1087,1093,1096,1097,1100&1102 KSB-117-095 25.May.'92 Inspection and Replacement of Starter-Generator Brushes E 90 Brush P/N 23033-1141 KSB-117-096 4.Aug.'92 Installation of Front Cover on Annunciator Panel D 90 1001～1084,1087,1093,1096,1097,1100&1102 KSB-117-097 31.Aug.'93 Change of Engine Fire Detectors to Detectors of Shot Type (Thermal Switch Type) O 60 1001～1024&1026～1030 KSB-117-098 6.Nov.'92 Replacement of External Door Handle Adapter of Cabin Door Incorporating Cabin Camera Window E 100 All A/C with cabin camera window(s) except 1019 KSB-117-098-1 2.Feb.'93 Ditto KSB-117-099B 19.Sep.'01 Inspection of Lower Frame(STA 1655)at Battery Mount for Cracks and Repair of Cracks E 20 1001～1008,1010～1084,1087,1093,1096,1097, KSB-117-101B 5.Feb.'97 Retrofit of an Electrical Engine Overspeed Protection System M 60 1001～1011, 1013～1035, 1037～1084, 1087,1093,1096 1097,1100 &1102～1104 TCD-4385-1-97 KSB-117-101B-1 7.Jan.'99 Ditto KSB-117-102 30.Aug.'94 Modification of KAWASAKI BK117 B-1 Helicopter(Ｍａｘ.Ap-proved Takeoff and Landing Gross Weight:3200kg)to KAWASAKI BK117 B- 2 Helicopter Configuration(Max.Ap-proved Takeoff and Landing Gross Weight:3350kg) O － Model B-1 KSB-117-102-1 17.Jul.'97 Ditto KSB-117-103 10.Feb.'94 Installation of N2 Speed Restriction Decal(s) E 90 All A/C equipped with engine(s) having cast PT rotor 3 / 12 ＫＡＷＡＳＡＫＩ ＳＥＲＶＩＣＥ ＢＵＬＬＥＴＩＮ ＩＮＤＥＸ ＢＫ１１７ 18.February.2021 Ｎｏ． ＤＡＴＥ ＳＵＢＪＥＣＴ ＣＡＴ ＳＹＳ EFFECTIVITＹ Aicraft Serial No. ＲＥＭＡＲＫＳ KSB-117-104 25.Aug.'93 Inspection of Main Rotor Swashplate for Cracks Cancelled. Incorporated in manual KSB-117-105 Blank KSB-117-106 21.Apr.94 Type I Long Range Fuel System-Inspection and Replacement of Hose Assemblies manufactured by Permaswage Cancelled. Incorporated in manual KSB-117-107 21.Feb.'94 Main Rotor System-Inspection of Rotor Hub Cap Bracket for cracks E 10 KSB-117-108 29.Jul.'94 Modification of Deflector Assembly of Air Scoop on Engine Cowling and Modification of Engine Water Washing Kit E 20 100 Model B-1,B-2 KSB-117-109 30.Aug.'94 Change of Zelectrical Wiring of Cargo Hook Release Switch for Helicopter Equipped with Digital Atumatic Flight Control System(DAFCS) E 100 1009,1088,1092,1094,1095,1097&1098 KSB-117-110 19.Jul.'95 Long Range Fuel Tank System-Modification of Fuel Tank Vent System and Improvement of Electrostatic Discharge E 100 Type Ⅰ&Ⅱ L.R.F.T System KSB-117-111 25.Ape.'95 Inspection of Securing Cyclic Stick Grip on the Cyclic Stick Tube and Addition of Locking Wire E 40 KSB-117-112 １．Dec.'95 Modification of Rescue Hoist Hook Keeper O 100 All A/C with Rescue Hoist System KSB-117-113 22.Dec.'94 Cargo Hook System-Improvement of Electirical Bonding of Rubber Plate E 100 All A/C with Cargo Hook System KSB-117-114 22.Dec.'94 Modification of Rescue Hoist Control Box E 100 All A/C with Rescue Hoist System KSB-117-115A 27.Jan.'06 Inspection of Main Rotor Blades M 10 KSB-117-115A-1 11.Sep.'08 Inspection of Main Rotor Blades M 10 KSB-117-116 9.Jan.95 Changing of Retirement Time for Components of Main Controls M 10 All TCD-4164-95 KSB-117-117 31.Mar.'95 Reidentification for Parts of Main Rotor Controls and Tail Rotor Drive E 10 30 All KSB-117-118 20.Feb.'96 Modification of Rescue Hoist Control Box E 100 All A/C with Rescue Hoist System KSB-117-119 5.dec.'96 80kg Auxiliary Fuel Tank System-Check for interfernce of fuel quantity transmitter and auxiliary fuel tank cell E 100 Equipped with 80kg Aux. Tank(under Floor) KSB-117-119-1 19.Aug.'97 Ditto KSB-117-120A 9.Jun.'98 Inspection of Engine Mounting Sideward Links for Crack and Wear and One-time Inspection for Corrosion M 60 All of Model BK117,A-3,A-4 B-1,B-2 TCD-4358-1-97 KSB-117-121 19.Jun.'97 Replacement of Engine Mount Sideward Links D 60 All of Model BK117,A-3,A-4,B-1,B-2 KSB-117-122 8.Jul.'98 2400-Hour Inspection-Main Transmissopm Lubrication System Components Cancelled. Incorporated in manual KSB-117-123 10.Feb.'98 Replacement of Engine N2 Control System Bearings D 60 Model BK117,A-3,A-4,B-1,B-2 Up to 1116 KSB-117-124A 29.Jan.'99 High Visibility Painting of Main Rotor lade O 10 All KSB-117-124A-1 21.Jan.'00 Ditto KSB-117-124A-2 13.Sep.'02 Ditto KSB-117-125 11.Mar.'98 Upgrade of OEI Rating Power for Model BK117 B-2 Replacement O 90 Model B-2 1001～1116 KSB-117-126 22.Sep.'99 Replacement of Radio Magnetic Indicator(RMI) O 100 All KSB-117-12７ 9.Jun.'98 One-time Corrosion Inspection for Engine Mounting Truss Supports M 60 All of Model BK117,A-3, A- 4,B-1,B-2 TCD-4930-99 KSB-117-128 Not Applicable KSB-117-129C 27.Jan.'06 Inspection and Reinforcement of Tail Boom Vertical Fin M 30 KSB-117-131 14.Aug.'97 Inspection and Reinforcement of Engine Accumulator Tube Assembly E 60 1001～1115 KSB-117-132A 25.Jun.'99 Inspection-Door Hinge of Intermediate Gearbox Accedd Door on Tail Boom Vertical Fin E 30 All KSB-117-133 Blank KSB-117-134A 7.Nov.'17 Crack Inspection for Main Rotor Mast Flange M 10 All KSB-117-135 11.Mar.'98 Change of Fuel Prime Pimp Electrical Circuit O 90 Model C-1 1038,1106,1108&1110～1112 KSB-117-136 ７．Nov.'97 Check for Tighteness of Self-lock Nuts at Limiter Base Area- Electrical System E 90 1001～1115 Airｃraft first 600H inspection is not Completed KSB-117-137 Blank KSB-117-138 28.Oct.'99 Installation of White strobe Light O 100 All 1001～1084,1087～1090,1092～1094,1096, 1097&1102～1104 1001～1084,1087～1098 except 1091,1101, 1102～1104 All of Model BK117,A-3,A-4,B-1,B-2,C-1 All of Model BK117,A-3,A-4,B-1,B-2,C-1 All of Model BK117,A-3,A-4,B-1,B-2,C-1 4 / 12 ＫＡＷＡＳＡＫＩ ＳＥＲＶＩＣＥ ＢＵＬＬＥＴＩＮ ＩＮＤＥＸ ＢＫ１１７ 18.February.2021 Ｎｏ． ＤＡＴＥ ＳＵＢＪＥＣＴ ＣＡＴ ＳＹＳ EFFECTIVITＹ Aicraft Serial No. ＲＥＭＡＲＫＳ KSB-117-139 25.Feb.'00 Main Rotor Head-Rework of Oil Seal Retainer D 10 All KSB-117-140 Not Applicable KSB-117-141 7.Jan.'99 1800-Hour Inspection-Freewheel Clutch Manufactured by Borg- Warner E 10 All KSB-117-144 Blank KSB-117-145 31.Mar.'99 Moditcation-Hydraulic Engine Torque Indicating System to Electrical Engine Torque Indicating System O 60 1001～1008 &1010～1017 Model A-4,B-1,B-2 only KSB-117-146 2.Jun.'00 Force Trim Release(FTR)Switch-Enhancement of Reliability and Maintainability for Replacement O 100 KSB-117-146-1 28.Mar.'01 Ditto KSB-117-147 23.Feb.'99 White Painting of Main Rotor Blade Upper Surface in the Area of the Balance Weights E 10 All KSB-117-147-1 13.Jun.'00 Ditto KSB-117-148 25.Feb.'99 One-time Inspection-Attaching Fasteners securing the Hanger Bearings of Tail Rotor Long Shaft M 30 All TCD-4975-99 KSB-117-150 7.Apr.'99 Replacement-Radar altimeter Transmitter/receiver(KRA405) O 100 Equipped with KRA405 KSB-117-151 21.Jul.'99 One-time Inspection-Bushings Fitted into Main Rotor Transmission Torque Mount Airframe side Fitting E 10 Except 1007,1085&1107 KSB-117-152 1.Jul.'99 An Interim Step until Allied Signal Service Bulletin No.LTS101-73- 20-0193 is Accomplished Cancelled. Superseded by KSB-117-161 KSB-117-154A 10.Oct.'00 Retrofit of Hook System for the Access Doors of the Transmission and Engine Cowlings M 20 1001～1123 TCD-5190-99 KSB-117-155C 26.Feb.'16 Replacement of Main Rotor Tension-Torsion Strap E 10 All KSB-117-156A 15.Mar.'02 Modification of Lucas Rescue Hoist Hook Assembly O 100 All KSB-117-159B 18.Feb.'21 Modification of Tail Rotor Head for Use of Tail Rotor Blades (117-317411 and 117-317491) O 30 BK117,A-3,A-4,B-1,B-2 KSB-117-160 7.Jan.'00 Crack Inspection-Main Rotor Blade Attaching Secondary Bolt E 10 1001～1084,1086～1106,1108～1123 KSB-117-161 20.Dec.'99 An Interim Step Against Unsatisfactory Function of Fuel Control System of Alliedsignal LTS-101-750B-1 Engine M 60 Model B-1,B-2 only for engines equipped with acceleration schedule biasing system TCD-5097A-99 KSB-117-166 29.Jun.'01 Markings on Inboard Auxiliary Fuel Tank D 60 KSB-117-168A 19.July.'05 Inspection of Main Rotor Blades for lead-lag and imbalance M 10 BK117,A-3,A- 4,B-1,B-2,C-1 KSB-117-170 12.Dec.'03 Replacement of Vibration Absorber Lower Fitting O 10 All KSB-117-172 23.Aug.'02 Addition of Terminal Module for NR Digital Measurement O 60 Model C-1 KSB-117-173 13.Sep.'01 Fuel Feed Vent Line-Replacement of Float Valve D 60 Model C-1 1110～1112,1116,1120～1130 KSB-117-179 29.Nov.'02 Addition of Part Number for New Hook on LUCAS Rescue Hoist O 100 All equipped with below part KSB-117-181 3.Jun.'03 Change of Fire-Extinguisher Bottle O 60 4002 KSB-117-184 5.Aug.'02 Inspection of Pressure Transducers in Tandem Hydraulic Unit E 40 All KSB-117-189 12.Nov.'02 Modification of Air-Conditioning System for Durability Improvement D 100 Model Basic～B-2 KSB-117-189-1 Cancelled KSB-117-189-2 24.Jan.'06 Modification of Air-Conditioning System for Durability Improvement KSB-117-191A 14.Oct.'15 Cockpit Door(Pilot/Copilot Ssde)Sliding Window Frame-Inspection for Adhesive Failure and Repair E 20 Except for Model C-2 KSB-117-192 23.Aug.'02 Modification and Inspection of Main Rotor Blades D 10 Model B-2,C-1 KSB-117-192-1 19.July.'05 Modification and Inspection of Main Rotor Blades D 10 KSB-117-196 26.Feb.'03 Cleaning, Inspection and Rust Preventive Treatment for Inside of Torque Tube (Cyclic) E 40 Except for Model C-2 KSB-117-197 12.Oct.'04 Extension of the ambient air temperature limitation through the replacement of pressure capsule instrument O 90 Model C-2 4001,4002 and 4003 KSB-117-198 8.Aug.'03 Addition of Tension Spring to N2 Control D 60 Up to 1130 KSB-117-198-1 22.Jan.'04 Ditto KSB-117-200A 28.Jul.'06 Exchange of Aircraft Emargency Locator Transmitter matching to 406 MHz O 100 KSB-117-201 9.Jan.'04 Modification for Improved Hovering Performance O 60 4001～4004 Equipped with Auto-pilot System(DAFCS), 117-81610-01 BK117,A-3,A-4,B-1,B-2,C-1 5 / 12 ＫＡＷＡＳＡＫＩ ＳＥＲＶＩＣＥ ＢＵＬＬＥＴＩＮ ＩＮＤＥＸ ＢＫ１１７ 18.February.2021 Ｎｏ． ＤＡＴＥ ＳＵＢＪＥＣＴ ＣＡＴ ＳＹＳ EFFECTIVITＹ Aicraft Serial No. ＲＥＭＡＲＫＳ KSB-117-202 15.Mar.'04 Change of Performance Charts at the Temporary Replacement of Engines E 60 Model C-2 KSB-117-204 5.Jun.'03 Equipment of Key Lock for Doors O 20 4001～4003 KSB-117-205 1.Mar.'04 Change of CPDS Software Version V2003 O 90 4002,4003,4005,4000 KSB-117-206 7.Jul.'03 Improvement of Glareshild O 20 4003 KSB-117-207 7.Jul.'03 Improvement of Instrument Panel O 20 4001～4003 KSB-117-208 9.Oct.'03 Inspection and Repair of Cracks in Mounting Hinges of Cockpit Doors E 20 Except for Model C-2 KSB-117-209 19.Mar.'04 Exchange of support for T/R FLEXBALL D 30 4001～4003,4005,4006 KSB-117-210 22.May.'03 Inspection of bearings in tail rotor transmission and intermediate gearbox, and reduction of the inspection interval for magnetic plug M 30 All KSB-117-212 8.Sep.'03 Inspection of Joint Area between Tail Boom and Vertical Fin Replacement of Protective Tape E 30 All KSB-117-213 17.Dec.'03 Replacement of VARTOMS monitor box O 60 4001～4003,4005,4006 KSB-117-215 19.Aug.'03 Inspection of the Wall Thickness of the Skin Panelling of the Vertical Fin, Tail Unit M 30 Except for Model C-2 KSB-117-216 7.Oct.'03 Addition of Scavenge Oil Filter O 60 KSB-117-217 5.Mar.'04 Modification of Tail Rotor Head E 30 4001～4003 KSB-117-218 27.Oct.'03 Drive Link Assembly - Necked Down Bolt Replacement and Revised Tightening Torque E 10 4001～4003,4005,4006 KSB-117-219 20.Jan.'04 Attitude and Heading Reference System (AHRS) Addition of free mode function O 100 Model C-2All equipped with FCDS KSB-117-223 2.Apr.'04 Detaching simplification of copilot side CP lever connector O 40 4001～4003,4005,4006 KSB-117-226 30.Nov.'04 Modification of main rotor blade static discharger (carbon cloth) D 10 ModelC-2 All KSB-117-227 13.May.'04 Modification of environmental control system to prevent the dripping of condensed watar D 100 KSB-117-228 30.Jun.'04 Installation of the cover for OAT sensor O 20 4001～4003,4005,4006 KSB-117-229 20.Apr.'04 Removal of unused relay of cargo hook system O 100 1001,1003～1016,1018,1019 KSB-117-230 5.Aug.'04 Prevention of blown tail light O 90 1001 thru 1132 KSB-117-231A 9.Feb.'05 Visual Inspection of Blind Rivets in Tail Boom Upper Skin M 30 4001～4003,4005,4006 KSB-117-232 9.Feb.'05 Replacement of tail boom upper skin rivets and adding new rivets E 30 4001～4003,4005,4006 KSB-117-234 2.Nov.'04 Modification of Gearbox Vent Tube － ARRIEL Engine O 60 C-1,4001～4003,4005,4006 KSB-117-235 2.Aug.'04 Additon of a power control relay for the Rescue Winch System (45m cable length) M 100 KSB-117-236 16.Jul.'04 Temporary emergency procedure for the BK117 Rescue Winch (45m cable length) M 100 KSB-117-237 12.Oct.'04 Inspection of Tail Cone Frame (STA6616) and Repair of Cracks E 20 Model C-2 4001 and 4002 KSB-117-237-1 30.Sep.'05 Inspection of Tail Cone Frame (STA6616) and Repair of Cracks E 20 Model C-2 4001,4002 and 4008 KSB-117-238 3.Feb.'05 Modification of the Main Rotor Blade bushing D 10 BK117 A-3,A-4, B-1,B-2,C-1 KSB-117-239 22.Feb.'05 Visual Inspection of Blind Rivets in Tail Boom Upper Skin M 30 1058～1132 KSB-117-239-1 30.Jun.'05 Visual Inspection of Blind Rivets in Tail Boom Upper Skin M 30 KSB-117-240 2.Nov.'04 Relocation of the limit switch which indicates caution for opening the external power supply door. O 90 4001 ～ 4003, 4005 ～ 4007 KSB-117-241 10.Mar.'05 Modification of connections on Relays for Operation of Cargo Hook and Emergency Float system E 100 KSB-117-242 30.Nov.'04 Cleaning of the Tail Rotor Blade Pitch Bearing E 30 ModelC-2 All KSB-117-245 22.Feb.'05 Replacement of tail boom upper skin rivets E 30 1058～1132 KSB-117-245-1 30.Jun.'05 Replacement of tail boom upper skin rivets E 30 KSB-117-246 28.Mar.'05 Installation of the YAW SAS O 100 4002,4003 KSB-117-246-1 27.Apr.'07 Installation of the YAW SAS O 100 4002,4003 KSB-117-247 1.Apr.'05 Inspection and replacement of rocker support of mixing lever assembly M 10 Models A-3,A-4,B-1,B-2,C-1 1001～1132 Cargo Hook : 4003, 4005, 4006 Emergency Float System : 4005, 4006 BK117,A-3,A-4,B-1,B-2,C-1 Up to 1132 on which environmental control system is installed All (except S/N 1036 and the helicopters on which AVR is installd) All equipped with Rescue Winch System except for Model C-2 BK117. A-3,A-4,B-1, B-2, C-1 1001～1132 All equipped with Rescue Winch System except for Model C-2 6 / 12 ＫＡＷＡＳＡＫＩ ＳＥＲＶＩＣＥ ＢＵＬＬＥＴＩＮ ＩＮＤＥＸ ＢＫ１１７ 18.February.2021 Ｎｏ． ＤＡＴＥ ＳＵＢＪＥＣＴ ＣＡＴ ＳＹＳ EFFECTIVITＹ Aicraft Serial No. ＲＥＭＡＲＫＳ KSB-117-248 23.May.'05 Introduction of a life limit for main rotor blades with bolted balance weight repair M 10 BK117,A-3,A-4,B-1,B-2,C-1 KSB-117-248-1 4.Apr.'05 Introduction of a life limit for main rotor blades with bolted balance weight repair M 10 BK117,A-3,A-4,B-1,B-2,C-1 KSB-117-249 7.Jun.'06 Modification of CP Balance Spring D 40 4001～4003, 4005～4008 KSB-117-251A 26.Mar.'08 Modification of bearing block (drive kink assembly)bushings position E 10 KSB-117-252 28.Dec.'05 Inspection and Replacement of Emergency Float Inflation Valve E 100 KSB-117-253A 14.Oct.'15 Additional screw fixations on the cockpit door sliding window frame(Copilot side) O 20 KSB-117-254 11.Nov.'05 Change of external Loudspeaker System Speaker Brackets M 100 4003,4007and4008 KSB-117-255 7.Mar.'06 Add Usable Fuel O 60 4001 thru 4003 and 4005 thru 4008 KSB-117-256 7.Mar.'06 Relocation of "Emergency Exit Handle" placard and decalcomania for Sliding Door Jettisoning O 20 4002, 4003, 4005 thru 4008 KSB-117-257 21.Nov.'05 Locking of Anti Collision Light Power Supply Unit Assembly Screws E 90 4001 thru 4003 and 4005 thru 4008 KSB-117-259 11.Nov.'05 Exchange of limiter base attachment washer D 90 4001 thru 4003,4005 thru 4008 KSB-117-260 19.Dec.'05 Chafing protection for backshell screw of CPDS and FCDS plugs. E 90 4001 thru 4003 and 4005 thru 4008 KSB-117-261A 9.Nov.'06 Modification of Rescue Winch Control Box E 100 KSB-117-262 28.Feb.'06 Emergency Float Skid Tube - Wall Thickness Inspections and Change of Rivets E 100 4001,4005and4006 KSB-117-264 27.May.'06 Improvement of Fire Fighting System – Belly Tank Ｏ 100 4001, 4007 and 4008 KSB-117-265 27.May.'06 Replacement of the mirror of cargo hook mirror Ｏ 100 KSB-117-266B 05.Feb.'21 Life–Limited Parts – Change of Life Limits for Life–Limited Parts Cancelled. Incorporated in manual KSB-117-267 27.May.'06 Cabin door center rail - addition of the angle Ｏ 20 4001, 4007 and 4008 KSB-117-268 27.May.'06 Addition of the Cover for the Collective Pitch Lever Guard of the Pilot Side Ｏ 40 4007 and 4008 KSB-117-269 20.Mar.'06 Rescue Winch System – Addition of the Guard Assembly for the Standby Switch O 100 4001, 4007 and 4008 KSB-117-271 16.Mar.'06 Additional Inspection for the Cabin Door Cancelled. Incorporated in manual KSB-117-272C 7.May.'15 Generator Control Unit - Inspection of the GND terminal M 90 All KSB-117-276 3.Oct.'06 Replacement of Mounting Bracket for Twist-Grip Position Indication Microswitch O 60 4001 thru 4003,4005 thru 4009 KSB-117-277 11.Aug.'06 Replacement of Connecting Bolts for Tail Rotor Drive Shaft System M 30 4001 thru 4003,4005 thru 4009 KSB-117-280B 6.Jun.'08 Accomplishment of 2.5 MIN OEI RATING CHECK ”MAX N1 CHECK” at high altitude M 60 Model C-1 All KSB-117-281A 6.Jun.'08 Accomplishment of 2.5 MIN OEI RATING CHECK ”MAX N1 CHECK” at high altitude M 60 Model C-2 All KSB-117-283 21.May.'07 Inspection and Modification of Engine Fire Extinguishing Tube Connection M 60 ModelC-1 All ,4001 thru 4003, 4005 thru 4010 KSB-117-284 3.Jul.'07 External Mounted Hoist System – Improvement of Junction Box E 100 4007 thru 4009 KSB-117-286 11.Oct.'07 Air conditioning – Cockpit Ventilation System – Inspection of wire harnesses / pitot / static pressure lines and modification of air distributors M 60 4001 thru 4003,4005 thru 4010 KSB-117-288 31.May.'07 External Mounted Hoist System – Change for fixation method of control pendant O 100 4001, 4007 thru 4009 KSB-117-289 31.May.'07 Optional Equipment - Improvement of EMS (Type Ⅱ) O 100 4009 KSB-117-291 11.Dec.'07 Inspection of the BK117 Tail Rotor Transmission Attachment Nut M 30 All KSB-117-293 7.May.'09 External Loudspeaker - Inspection of the base of the speaker horn and prevention of the omission of the speaker horn E 100 KSB-117-294 9.Jul.'08 Modification of stick locking device M 40 Model C-2 All KSB-117-295Ｂ 13.Oct.'17 Check bearings on Tail Rotor and Lateral Control for Flight Control System M 40 Model C-2 All KSB-117-296 4.Oct.'11 Inspection of wire harnesses for chafing and Retrofit E 90 4001 thru 4021,4023 KSB-117-297 28.Nov.'08 Tail Rotor – Check of the weights and the control lever M 30 All KSB-117-300A 19.May.'09 Inspection and Replacement of the aft cross tube E 50 Model C-2 All KSB-117-301 6.Feb.'09 Inspection of the nuts and chamfer of the studs on the fuel tanks E 60 4012 4001～4003,4005～4011 Models A-3, A-4, B-1, B-2, C-1 All equipped with following parts All equipped with Cargo hook mirror （P/N; B851K1850-051） BK117,A-3,A-4,B-1,B-2,C-1 (All equipped with following sliding window) 1016,1117 and 1118,1079,1106,1108,1110～1112 1116,1120～1124,1126,1127,1129 and 1130 4003,4007～4009 and 4011 All equipped with Rescue Winch (45m) (P/N: 117-83500-01) 7 / 12 ＫＡＷＡＳＡＫＩ ＳＥＲＶＩＣＥ ＢＵＬＬＥＴＩＮ ＩＮＤＥＸ ＢＫ１１７ 18.February.2021 Ｎｏ． ＤＡＴＥ ＳＵＢＪＥＣＴ ＣＡＴ ＳＹＳ EFFECTIVITＹ Aicraft Serial No. ＲＥＭＡＲＫＳ KSB-117-302 6.Apr.'09 Modification of the neutral holder M 40 Except for Model C-2 KSB-117-303 9.Feb.'10 Installation of the voice recorder (DAFR) O 100 Model C-2 All KSB-117-304 24.Dec.'09 Inspection and Protection of Hydraulic Hoses E 40 4001 thru 4013 KSB-117-305A 20.Aug.'10 Rescue Winch System - Check of Boom Support for cracks M 100 KSB-117-306 16.Jun.'09 Inspection and replacement of long drive shaft for correct rivets M 30 Model C-2 All KSB-117-307B 2.Jun.'10 Reduction of the life limit of the bevel gears on the intermediate gear box M 30 Model C-2 All KSB-117-308B 2.Sep.'09 Inspection and replacement of the hook installed on Rescue Hoist Assembly M 100 KSB-117-309 10.Jul.'09 Inspection of the Jettison Mechanism of Jettisonable Sliding Door E 20 KSB-117-311 3.Aug.'09 Inspection of the Level Wind Screw installed on Rescue Hoist System M 100 KSB-117-312 9.Sep.'09 Inspection of the Lock-Release-Safety-Pin of the Jettisonable Sliding Door M 20 KSB-117-315 18.May.'10 Improvement of system test function of the mast moment monitoring system E 80 4001 thru 4014 KSB-117-316 31.Aug.'10 MODIFICATION OF JETTISONABLE SLIDING DOOR M 20 KSB-117-317A 4.Jul.'14 Inspection and repair of screw installation on YAW SEMA CONTROL ROD M 40 KSB-117-318 31.Mar.'10 Inspect bearings of bellcrank (Upper control) for correct attachment M 40 Model C-2 All KSB-117-319 29.Jun.'10 Inspection of Engine Lubrication Pipes and Oil Supply Hoses Cancelled. Incorporated in manual KSB-117-320 27.Aug.'10 Inspection of Wire Harness and Pressure hydraulic tube for chafing E 90 4001 thru 4016 KSB-117-323A 29.Oct.'10 INSPECTION OF THE RELEASE FORCE, DOOR LOCK ROLL POSITION AND REPLACEMENT OF LOWER DOOR BRACKET M 20 4001 thru 4016 KSB-117-324 8.Dec.'10 Rigging Check of the main rotor controls M 40 Model C-2 All KSB-117-325B 14.Jun.'11 INSPECTION AND MODIFICATION OF THE OPERATING FORCE FOR ICP BARO KNOB M 90 KSB-117-327 24.Jan.'12 Addition of Diode for External Power Relay O 90 4001 thru 4014 KSB-117-329 14.May.'14 Replacement of the pilot seat O 70 4001 thru 4016 KSB-117-330 10.Dec.'10 The request of adjustment in dimension between the door proximity switch and the target Cancelled. Incorporated in manual KSB-117-333 28.Apr.'11 Inspection and Protection of Hydraulic Hoses E 40 Except for Model C-2 KSB-117-334 27.Apr.'11 INSPECTION AND REWORK OF CARGO HOOK KEEPER M 100 All All equipped with Cargo Hook KSB-117-335B 12.Sep.'16 Inspection of the Jettison Mechanism of Jettisonable Sliding Door M 20 KSB-117-336 15.Jul.'11 Inspection of Ball Bearing Control E 40 4001 thru 4021 KSB-117-337 26.Aug.'11 Inspection of a clearance of the hydraulic line in the tail boom E 40 4001 thru 4018 KSB-117-338 25.Oct.'11 Separate for routing of wire harnesses on Rescue Winch System E 100 KSB-117-339 4.Aug.'11 Inspection of the Outside Handle fixation condition of Cockpit and Cabin Doors M 20 Except for Model C-2 KSB-117-340 5.Dec.'11 Removal of Diode Assemblies on Generator Relays M 90 4001 thru 4021, 4023 KSB-117-343A 26.Jan.'18 INSPECTION OF YAW SEMA CONTROL ROD E 40 KSB-117-344 1.Feb.'12 Inspection of DC power system box (Aft battery box, Distribution box, Fwd Junction box) E 90 KSB-117-345 29.Mar.'12 Inspection for the spherical bearing staking of the Tail Rotor Pitch Link M 30 KSB-117-346 10.Apr.'12 Inspection for the close-tolerance bolt and nut of the Tail Rotor Head attaching parts M 30 All KSB-117-347 9.Jan.'13 Improvement of the wiring method in the ceiling part of the MID cabin D 90 4002 thru 4012 KSB-117-348A 9.Jun.'15 Change of the connection destination and duplication of GCU ground wire M 90 All KSB-117-349 Not Applicable KSB-117-350 Cancelled Incorporated in manual All Model C-2 4001 thru 4021, 4023, 4024 Model C-2 All All equipped with Jettisonable Sliding Door (Including helicopters after compliance with KSB-117-250) Model C-2 All All Helicopters equipped FCDS Model C-2 All Up to 4016 on which Jettisonable Sliding Door is equipped. (Including helicopters after compliance with KSB-117-250) Model C-2 All (Helicopters equipped with AFCS or Yaw SAS) Model C-2 All All equipped with rescue winch system Model C-2 All All equipped with Jettisonable Sliding Door (Including helicopters after compliance with KSB-117-250) Model C-2 All Excluding without yaw SEMA control rod(NOTE) Model C-2 All Helicopters equipped FCDS Model C-2 All equipped with rescue winch system Model C-2 All All equipped with Jettisonable Sliding Door (Including helicopters after compliance with KSB-117-250) Model C-2 All equipped with rescue winch system Model C-2 All equipped with rescue winch system 8 / 12 ＫＡＷＡＳＡＫＩ ＳＥＲＶＩＣＥ ＢＵＬＬＥＴＩＮ ＩＮＤＥＸ ＢＫ１１７ 18.February.2021 Ｎｏ． ＤＡＴＥ ＳＵＢＪＥＣＴ ＣＡＴ ＳＹＳ EFFECTIVITＹ Aicraft Serial No. ＲＥＭＡＲＫＳ KSB-117-351 30.Jan.'13 Replacement of the keeper return spring of the Cargo Hook E 100 KSB-117-352 Not Applicable KSB-117-353A 14.Feb.'18 Additional PU film for the main rotor blades O 10 Model C-2 All KSB-117-354 14.Nov.'12 Strict compliance of installation procedure for the external cargo on Cargo Hook E 100 KSB-117-356 22.Jan.'13 Replacement of SPAS Airspeed Sensor (Add the alternate part) O 40 KSB-117-356-1 19.Apr.'13 Ditto KSB-117-357 3.Apr.'13 CPDS Software Upgrade for V2006 O 90 4001 thru 4021 KSB-117-358 19.Apr.'13 The proper attachment of the access hole cover for the plate assembly of the hydraulic system D 20 4002 thru 4025, 4027 KSB-117-359 10.Jul.'13 Replacement of generator control unit M 90 4001 thru 4027 KSB-117-360 2.Sep.'13 Modification of the fixing method for the safety covers on the transmission and the engine cowling D 20 4016 thru 4028 KSB-117-361F 23.May.'16 Load Check of Rescue Winch System and Overload Clutch Replacement M 100 KSB-117-362 30.Sep.'13 Replacement of the placard for handling of the Cargo Hook E 100 KSB-117-363 28.May.'13 Modification of the attachment configuration of the limiter in the Aft Battery Box E 90 KSB-117-364 10.Sep.'13 Installation of the settling protector O 100 KSB-117-365 13.Nov.'13 Revision of the MEL(Minimum Equipment List)－Automatic Flight Control System (AFCS) M 100 KSB-117-366 11.Oct.'13 Addition of a cable support for FCDS wire harness D 90 KSB-117-367 9.Feb.'15 Modification of fixing method for aft fire wall gasket D 60 KSB-117-368 2.Aug.'13 Inspection for attachment of output lever of lateral and longitudinal trim actuators M 40 Model C-2 All KSB-117-369A 17.Nov.'14 Removal of Inverter O 100 KSB-117-370 23.Jul.'13 Visual inspection of ARM ASSY M 60 All KSB-117-371 13.Feb.'14 Installation or relocation of the drip catcher D 40 KSB-117-372D 26.Feb.'15 Modification of the hook damper on the rescue hoist system M 100 KSB-117-373 15.Apr.'14 Fall prevention of the lamp cap of the position light E 90 4001 thru 4016 KSB-117-374A 25.Mar.'15 Establishment of airspeed limitations for hands-off operation－Automatic Flight Control System (AFCS) M 100 KSB-117-375A 6.Aug.'18 Prevention of the blown lamp in the position light O 90 4001 thru 4016 KSB-117-376A 14.Nov.'16 Replacement of the Goodrich hook damper with the AHD hook bumper assy O 100 KSB-117-377 14.May.'14 Prevention of the wear on the hinges of the equipment shelf under floor D 90 KSB-117-378 15.Apr.'14 Exchange of O-ring for nut of fuel tank vent fitting E 60 KSB-117-379A 29.Jan.'16 Removal of ADF system (DFS-43A) O 100 KSB-117-380 18.Aug.'14 Fall prevention of the light cap of the tail position light E 90 Except for Model C-2 KSB-117-381 17.Dec.'15 Check for the wiring of cabin Ceiling E 90 KSB-117-382 27.Jun.'14 Rescue Winch System - inspection and retrofit of the hoist control pendant wiring harness M 100 KSB-117-383 29.Sep.'14 Replacement of the upper arm and rear arm of the Jettisonable sliding door E 20 KSB-117-384A 31.Mar.'16 Replacement of Cockpit Door Inside Handle Cancelled. Incorporated in manual KSB-117-385 25.Mar.'15 Change of SEMA “ACTIV“line-Automatic Flight Control System (AFCS) M 100 KSB-117-388 9.Feb.'15 Prevention of loosening for fixing screws on lighting plates D 90 Model C-2 All KSB-117-389 16.Apr.'15 Software upgrade of NAV/COM/GPS transceiver O 100 KSB-117-390 16.Apr.'15 GPS system for IFR operation O 100 All （helicopters equipped with the Cargo Hook） 4012 thru 4025, 4027, 4028 4001～4031(the helicopters equipped with Rescue Winch System) Model C-2 the helicopters which are equipped with AFCS （B221K2801-051 or B221K2801-052） Model C-2 All All equipped with rescue winch system 4002 thru 4004, 4019 4023 thru 4026, 4028 Model C-2 All All equipped with rescue winch system Model C-2 All （Except Emergency Float is equipped） 4001, 4005～4010, 4012～4018, 4020～4022, 4027, 4030, 4031 Model C-2 All All Helicopters equipped with FCDS, The helicopters in which KSB-117-369 NC has been already accomplished. Model C-2 All (the helicopters with installed S430W / GNS430AW) 4001 thru 4030 4027, 4028, 4030 Model C-2 All All helicopters equipped with Jettisonable Sliding Door (Including helicopters which KSB-117-250 has been accomplished) All （helicopters equipped with the Cargo Hook） All （the helicopters with installed Rescue Winch System(P/N:117-85100-101), Model C-2 All （the helicopters with installed Rescue Winch System） 4001 thru 4031 4001, 4005～4010, 4012～4018, 4020～4022, 4027, 4030 (Including helicopters for which KSB-117-379 NC has been accomplished) 4001-4034 (the helicopters which are equipped with AFCS) KAWASAKI-BK117 C-1 All KAWASAKI-BK117 C-2 4001～4034 All equipped with Cargo Hook (Model C-2 4001 thru 4021, 4023 thru 4025) Except for Model C-2 All Helicopters equipped SPAS 4001～4034 (the helicopters which are equipped with AFCS) Model C-2 All (The helicopters installed with GNS430W) 9 / 12 ＫＡＷＡＳＡＫＩ ＳＥＲＶＩＣＥ ＢＵＬＬＥＴＩＮ ＩＮＤＥＸ ＢＫ１１７ 18.February.2021 Ｎｏ． ＤＡＴＥ ＳＵＢＪＥＣＴ ＣＡＴ ＳＹＳ EFFECTIVITＹ Aicraft Serial No. ＲＥＭＡＲＫＳ KSB-117-391 21.Mar.'18 Replacement of Holder 10L Assembly for Flexible Cable inside Tail Boom D 20 4001thru 4016 Helicopters equipped with U-type holder KSB-117-392A 22.Mar.'17 Replacement of the AHD hook bumper assy with the Goodrich hook damper O 100 KSB-117-393 16.Apr.'15 Change of spacers in overhead panel O 90 KSB-117-394 10.Mar.'15 Installation of lockwires on clamps for mounting swashplate boot M 40 All KSB-117-395 16.Apr.'15 Rescue hoist - Improvement on securing method of roller for limit switches D 100 KSB-117-396A 28.Nov.'18 Improved Connection of the Gearbox Vent Tube D 60 Model C-1All, Model C-2 4001 thru 4037 KSB-117-397A 23.May.'16 Replacement of NAV/COM/GPS Receiver/Transmitter GNS430 with GNS430W O 100 KSB-117-398 28.Apr.'15 Check for correct installation position of heat-shrinkable sleeve used on the collective lever (pilot) wiring harness M 40 4001 thru 4036 KSB-117-399 2.Jul.'15 Inspection of Ground Studs for Electrical Power Supplies (Generator and Battery) E 90 4001 thru 4035 KSB-117-400A 9.May.'16 Vibration Absorber - Introducing Flanged Spacers M 10 Model C-2 All KSB-117-401 28.Aug.'15 Inspection of attaching hardware for support bearing of Tail Rotor (T/R) long drive shaft E 30 KSB-117-402 4.Sep.'15 Rescue Winch System - Improvement of the hoist control pendant wiring harness D 100 KSB-117-403 29.Mar.'16 Replacement of screws for EMS equipment side seat E 100 KSB-117-404 6.Oct.'15 Addition of instructions to secure wire harness to aircraft equipped with EMS equipment E 100 4006 KSB-117-405 30.Oct.'15 Replacement of angle joint in jettisonable sliding door E 20 KSB-117-406B 8.Jun.'18 Inspection and Retrofit of Fasteners for Hydraulic Module Plate Assembly M 40 Model C-2 All KSB-117-407 1.Mar.'16 Addition of Block to Prevent Cockpit Door Lock Engagement Failure O 20 KSB-117-408 27.Jun.'16 Inspection and Modification of Air Inlet M 20 4001 thru 4028 4030 thru 4039 KSB-117-409 12.Feb.'16 Inspection of Shackle Installation Point on Cargo Hook E 100 KSB-117-410 14.Jul.'16 Improvement of Antenna Cable Wiring for Radar Altimeter System D 100 KSB-117-411 7.Mar.'16 Reinforcement of Support Assembly for DME Transmitter Receiver D 80 KSB-117-412A 15.Dec.'17 Replacement of new OAT sensor O 60 Model C-1 All KSB-117-413 26.Apr.'16 Change to Part Numbers and Life Limit of Hoist Cable E 100 KSB-117-414 22.Aug.'16 Unification of part number for Tail Rotor Drive Shaft installation bolt E 30 Model C-2 All KSB-117-415 12.May.'17 Modification of Pilot Collective Lever O 40 KSB-117-416 28.Sep.'16 Rescue Winch System - Improvement of Cable Length Indication on CPDS O 100 KSB-117-417 27.Jul.'16 Inspection of the tail rotor transmission for cracks M 30 All KSB-117-418 26.Jan.'18 Change to fixing procedure of the bonding jumper on the yaw SEMA control rod D 40 KSB-117-419 6.Feb.'17 Replacement of Cardan Joint of Tail Rotor Actuator O 100 KSB-117-420A 12.May.'17 Modification of the support to install the post-TU371 tachometer box O 60 KSB-117-422 19.Oct.'16 Inspection of Angle Joint in Cockpit Door E 20 KSB-117-423 11.Jul.'17 Replacement of AFCS Auto Pilot Module (APM) D 100 KSB-117-424 22.Dec.'16 Clearance, Chafing and Protection Inspection for Wiring in Overhead Panel E 90 KSB-117-425 7.Feb.'17 Improvement on securing method of the Wire Harness for Position Light D 90 KSB-117-426 7.Feb.'17 Inspection of Cabin Ceiling Wiring and Retrofit for Prevention of Chafing E 90 4013 thru 4043 KSB-117-427 10.Oct.'17 Reinforcement of Frame under Floor Access Cover in Cabin Entrance/Exit D 20 4001 thru 4044 KSB-117-427-1 29.Jan.'19 Ditto KSB-117-428 26.Jun.'17 Main Rotor Hub Cap – Modification of Boreholes E 10 All KSB-117-429 17.Oct.'17 Improvement of Cargo Hook Cover D 100 All All equipped with Cargo Hook 4001 thru 4013 4001 thru 4007 Model C-2 All helicopters up to serial no. 4016 equipped with jettisonable sliding doors (including helicopters for which KSB-117-250 has been accomplished). Model C-2 All (Helicopters equipped with the Rescue Winch System) 4001, 4005 thru 4010 for which KSB-117-379 or KSB-117-379A has been completed, and 4013 Except for Model C-2 (helicopters equipped with Rescue winch system(P/N 117-85100-201) 4001 thru 4028, 4030 thru 4043 4001 thru 4027 4001, 4007 thru 4010, 4013, 4016, 4022 (Helicopters equipped with the RescueWinch System) Model C-2 All (Helicopters equipped with EMS equipment) Model C-2 Helicopters equipped with AFCS (B221K2801-051) Helicopters equipped with AFCS (B221k2801-052) 4001 thru 4028, 4030 thru 4039 4001 thru 4028, 4030 thru 4041 All (Helicopters equipped with radar altimeter system) Model C-2 All (Helicopters equipped with the Rescue Winch System.) 4001 thru 4006, 4008 thru 4028, 4030 thru 4044 (Helicopters equipped with White Strobe Light) All (Helicopters equipped with tail rotor actuator) 4001 thru 4028 4030 thru 4035 Model C-2 All All equipped with rescue winch system All (Excluding without yaw SEMA control rod) 4002 thru 4004, 4019 4023 thru 4026, 4028 All (Helicopters equipped with a cargo hook) 10 / 12 ＫＡＷＡＳＡＫＩ ＳＥＲＶＩＣＥ ＢＵＬＬＥＴＩＮ ＩＮＤＥＸ ＢＫ１１７ 22.June.2021 Ｎｏ． ＤＡＴＥ ＳＵＢＪＥＣＴ ＣＡＴ ＳＹＳ EFFECTIVITＹ Aicraft Serial No. ＲＥＭＡＲＫＳ KSB-117-430 26.Mar.'18 Check and Replacement of Lead Assembly for Magnetic Compass D 90 All Mfg. S/N 4003 and subsequent or helicopters on which KSB-117-222 has been accomplished. KSB-117-431A 22.Jun.'18 Part Number Conversion for Generator Control Unit M 90 4001 thru 4048 KSB-117-432B 6.Mar.'19 Main Rotor Blade – Replacement of Trim Tab O 10 All KSB-117-433 20.Dec.'17 Replacement of Bonding Jumper for Collective Lever Downlock Detection D 70 4001 thru 4046 Helicopters equipped with FCDS KSB-117-434 15.Jan.'18 Introduction of Life Limit for Helical Gear Support on Main Rotor Transmission M 10 All KSB-117-435A 30.Aug.'18 Main Rotor Blade Inspection of Lead-Lag Value and Imbalance E 10 Except for Model C-2 KSB-117-436 19.Mar.'18 Change of Wiring Route for ATC Transponder D 90 4040, 4042 thru 4044 KSB-117-437 30.Jul.'18 Improvement of Installation Work for the Standby Horizon O 90 4001 thru 4046 Equipped with FCDS KSB-117-437-1 20.Sep.'18 Ditto KSB-117-438 12.Dec.'17 Inspection of Engine Drain Lines D 60 KSB-117-439 6.Jul.'18 Improvement of the Support Connection on the Cargo Hook Mirror O 100 KSB-117-440 11.Apr.'18 Inspection of Tail Rotor Transmission (TGB) for Cracks M 30 All KSB-117-441 6.Mar.'19 Improvement of Engine Fire Extinguishing System Test Circuit D 60 4001 thru 4047 KSB-117-442 27.Apr.'18 Main Rotor Blade - Change of Inspection Interval for Blade Thimble M 10 All KSB-117-443 15.Jun.'18 Main Rotor Blade Inspection of Lead-Lag Value and Imbalance (100 Fhs) E 10 Except for Model C-2 KSB-117-444 29.Aug.'18 Inspection of the Brush Leads for the Starter-Generator E 90 1001 thru 1133 4001 thru 4047 KSB-117-445 18.Jan.'19 Replacement with the Improved Upper Cowling O 20 4001 thru 4046 KSB-117-446 29.Jul.'19 Installation of a New Windshield Wiper System O 70 Model C-2 all KSB-117-447 22.Jun.'21 Improvement of Reliability - AHRS On-Ground Detection System D 100 Model C-2 with FCDS KSB-117-448 23.Oct.'18 Rescue Hoist - Inspection of the hook spring system M 100 Model C-2 all Equipped with Rescue Winch KSB-117-449 19.Dec.'18 Visual Inspection of the Main Rotor Actuator M 40 4001 thru 4047 KSB-117-451 18.Sep.'19 Removal of the Decal that Indicates VNE Limitations for External Optional Equipment E 100 Model C-2 Equipped with applicable optional equipment KSB-117-452 3.Oct.'19 Changing of Retirement Time and Part Number for Parts of Main Rotor, Main Rotor Controls, and Tail Rotor M 10 30 40 Up to model C-1 KSB-117-453A 6.Oct.'20 Modification/Addition of Life Limits and Addition of Mandatory Inspection Interval M 10 30 40 Model C-2 all KSB-117-454 8.Nov.'19 Prohibition of Blend Repair, Confirmation of Repair History and Crack Inspection for Critical Area of Main Rotor Mast Flange E 10 Model C-2 all KSB-117-455 28.Nov.'19 Improvement of Corrosion-Resistance for the Cross Tube Cover O 20 4001 thru 4034 KSB-117-456 30.Jul.'20 Introduction of New Tail Rotor Actuator O 40 Model C-2 all KSB-117-457 19.Feb.'20 Main Rotor Blade Inspection of Lead-Lag Value and Imbalance (300 Fhs) E 10 Except for Model C-2 KSB-117-458 30.Jul.'20 Replacement of Cardan Joint of New Tail Rotor Actuator O 40 Model C-2 all KSB-117-459 27.Feb.'20 Emergency Float System - Inspection of Supply Hoses M 100 Model C-2 Equipped with Emergency Float System KSB-117-461 17.Sep.'20 Visual Inspection of the Nuts on the Pistons of the Main Rotor Actuator M 40 Model C-2 KSB-117-462 13.Nov.'20 Modification (Change/Addition/Deletion) of Time Change Items in the Aircraft Logbook or the History Logs M 10 30 40 100 All KSB-117-463 23.Mar.'21 Change of Fuel Transfer Pump Switches O 60 Model C-2 KSB-117-465 23.Mar.'21 Change of Stud on Fuel Filler Door and External Power Access Door O 20 Model C-2 KSB-117-466 12.Apr.'21 Inspection for Installation of Collective Bellcrank for Upper Control M 40 4001 thru 4047 Up to model C-1, equipped with Cargo Hook Mirror Model C-1, Model C-2 All 11 / 12 ＫＡＷＡＳＡＫＩ ＳＥＲＶＩＣＥ ＢＵＬＬＥＴＩＮ ＩＮＤＥＸ ＢＫ１１７ 29.July.2021 Ｎｏ． ＤＡＴＥ ＳＵＢＪＥＣＴ ＣＡＴ ＳＹＳ EFFECTIVITＹ Aicraft Serial No. ＲＥＭＡＲＫＳ KSB-117-467 27.May.'21 Replacement of the Velour Tape on the Cockpit Door Sliding Window E 20 Model C-2 KSB-117-469 29.Jul.'21 SX-16 Searchlight – Application of LOCTITE to Screws Inside Azimuth Housing Assembly E 100 Model C-2 Equipped with searchlight SX-16 12 / 12

All KAWASAKI BK117 service bulletins