U.S. AIRWORTHINESS DIRECTIVES
Robinson R44 Raven II · Airworthiness Directives
Overview
This document outlines the U.S. Airworthiness Directives (ADs) applicable to Robinson helicopters, specifically focusing on the R44 series. It includes mandatory inspections, modifications, and replacements necessary to maintain airworthiness and safety. The directives are aimed at operators, maintenance personnel, and regulatory bodies to ensure compliance with safety standards. Each directive specifies the action required, the affected components, and any associated service bulletins (SB) for further guidance. The document is crucial for ensuring the ongoing safety and reliability of the R44 helicopters in operation.
- Inspect C029-3 TR blades for cracks before each flight.
- Replace D270-1 Rev A thru E governor controller with Rev F or later.
- Check A185 riveted brackets as per AD 2024-23-01.
- Follow AD 2023-11-07 for radar altimeter operation restrictions.
- Modify engine RPM sensor wiring as per AD 2022-12-08.
Document
Source
Originally published by robinsonstrapistorprod.blob.core.windows.net. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.
Document details
- Type
- Airworthiness Directives
- Year
- 2025
- Pages
- 7
- File size
- 168 KB
- Publisher
- robinsonstrapistorprod.blob.core.windows.net
Common. One of the most common aircraft types we track.
Most owners only have the POH. Here's the essential set for the Robinson R44 Raven II.
- Pilot's Operating Handbook / AFM
- Checklist
- Maintenance Manual
- Parts Catalog (IPC)
- Systems & Wiring
- Service Bulletins
- Type Certificate (TCDS)
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In this document
Inspection Requirements
The document mandates several inspections for the R44 series, including a check of the A185 riveted bracket and the C029-3 TR blades for cracks before each flight. Specific service bulletins (SB-113, SB-110) provide detailed procedures for these inspections.
Governor Controller Replacement
AD 2024-20-03 requires the removal of the D270-1 Rev A thru E governor controller and its replacement with D270-1 Rev F or a later approved revision. This is critical for ensuring proper governor function.
Engine/Transmission Coupling
Directive 2024-19-11 addresses the engine/transmission coupling, specifically the clutch shaft forward yoke (pn C907-1 & -2). Operators must follow the associated service bulletins for compliance.
Radar Altimeter Operations
AD 2023-11-07 outlines restrictions on operations requiring radar altimeters, emphasizing the need for compliance with the latest safety standards.
RPM Sensor Wiring Inspection
AD 2022-12-08 mandates the inspection and modification of engine RPM sensor wiring, with specific service bulletins detailing the necessary actions.
Safety notes
- Failure to comply with these directives may result in unsafe operating conditions.
- All inspections must be documented and reported as per FAA regulations.
Full document text
Rev: 15 July 2025 (Hyperlink corrections, various edits) U.S. AIRWORTHINESS DIRECTIVES (see also FAA Advisory Circular 39-7D) Page 1 of 7 Robinson R22-series helicopters (TCDS H10WE): 2024-20-03 Remove D270-1 Rev A thru E governor controller from service and install D270-1 Rev F or later approved revision (SB-121) 2024-04-02 Before the first flight of the day, check each A029-2 REV A thru U TRB tip cap area (SL-93A, SB-120C, AMOC to AD 2024-04-02) 2023-11-07 Restrictions on operations requiring radar altimeters (Statement to accompany AD 2023-11-07, supersedes AD 2021-23-13) 2022-12-08 Inspect & modify C143-1 engine-RPM sensor wiring (SB-119; AMOC to AD 2022-12-08 dated 2025.06.23, AMOC to AD 2022-12-08 dated 2024.06.13, AMOC to AD 2022-12-08 dated 2022.08.05) 2014-23-16 Inspect A016-4 MRBs, retire by JAN 2020, (SB-103A, SB-96, SL-56B, supersedes 2011-12-10) 2013-19-06 R22 s/n 0002-4271 w/ A670-1 Rev A-H lever-handle fuel shut-off valve (SB-105) 2010-24-03 R22 s/n 0002-3325 w/ >2200h TTIS, tail rotor pedal bearing block supports (SB-97) 2005-16-05 R22's modified by Tech Tool Plastics' door STC SR09189RC 2004-19-09 A016-2 MRB 10-yr life, retires A016-1, supersedes 2004-06-52, moots 94-15-08 & 80-11-07 2003-04-04 A031-1 Rev J or prior TR pitch control (SB-90A) 2000-20-51 A203-5 yoke half assy Lots 24 thru 43, or letter-coded (SB-88A) 2000-08-09 A188-2 s/n 3708-3757, 3808-3893, & 3908-4207 (SB-85) 99-07-17 A188-2 s/n 3708-3757, 3808-3893, & 3908-4207 (SB-85) 99-02-02 A947-1 Rev A-D, A193-1 flexplate (SB-73 & SB-75; supersedes 98-14-08, 95-06-07, 94-11-01) 98-21-09 Fuel tank vent modifications (SB-83 & SB-84) 97-25-05 R22 s/n 2571-2664 carburetor & CAT gage change (SB-82) 97-02-14 Chg Nr warning, install gov’r, POH rev (SB-80A; supersedes 96-11-08 & 82-23-51, SB25) 96-09-29 A170-1 Rev I & J & A170-2 Rev J upper sheaves (SB-77) 95-26-04 POH change (supersedes 95-04-14 & 95-02-03) 95-23-05 A021-1 TRGB mfg’d or OH’d prior to 8 June 92 (SB-74, SL-45; supersedes 94-17-07) 95-11-09 POH change & install placard prohibiting Low-G pushovers (SB-79) 95-06-03 A006-1 Rev A thru Z MRGB, manufactured or overhauled prior to 15 June 92 (SB-76) 92-06-17 NAS1304-16 bolts marked "AF" (SB-69) 90-17-01 Carburetor airbox latches (SB-61) 88-26-01 R2 A158-1 MR Spindles (SB-60A; supersedes 88-24-03) 87-18-03 A258 pitch links (SB-57) 84-18-04 A006-1 MRGB Rev A thru V (SB-43) 83-15-07 R1 A016-1 Rev W MR blades (SB-33) 82-15-07 Tail rotor drive R22 s/n 0002 thru 0282 (SB-20, SL-14) 82-11-01 A020-2 frame s/n 0002 thru 0287 (SB-47, SB-23, SB-18, SB-3) Rev: 15 July 2025 (Hyperlink corrections, various edits) U.S. AIRWORTHINESS DIRECTIVES (see also FAA Advisory Circular 39-7D) Page 2 of 7 Robinson R22-series helicopters (TCDS H10WE): 82-03-07 A016-1 Rev A-V MR blades (SB-13; supersedes 81-24-10 & 81-19-03) 81-05-52 R1 A194 yoke R22 s/n 0002 thru 0095 as specified (SB-11, SB-9, SB-6) 80-26-06 Tail rotor drive R22 s/n 0002 thru 0058 (SL-6) 80-24-01 A020-2 frame s/n 0002 thru 0082 80-21-53 MRGB gears s/n 39 thru 210 Rev: 15 July 2025 (Hyperlink corrections, various edits) U.S. AIRWORTHINESS DIRECTIVES (see also FAA Advisory Circular 39-7D) Page 3 of 7 Robinson R44-series helicopters (TCDS H11NM): 2024-23-01 Requires inspection of each A185 [riveted] bracket and depending on the results, accomplishing additional inspections or taking any necessary corrective actions (SB-113, SL-61B) 2024-20-03 Remove D270-1 Rev A thru E governor controller from service and install D270-1 Rev F or later approved revision (SB-114) 2024-19-11 Engine/Transmission coupling - clutch shaft forward yoke pn C907-1 & -2 (SL-91, AMOC to FAA AD 2024-19-11 Ref. 775-24-00418, AMOC to FAA AD 2024-19-11 Ref. 775-24-00419, AMOC to FAA AD 2024-19-11 Ref. 775-25-00002) 2024-04-02 Before the first flight of the day, check each C029-3 REV A thru Q TRB tip cap area (SL-82A, SB-112C, AMOC to AD 2024-04-02 dated 2025.01.23) 2023-11-07 Restrictions on operations requiring radar altimeters, (SB-117, Statement to accompany AD 2023-11-07; supersedes AD 2021-23-13) 2022-19-12 Inspect C029-3 TR blades (S/Ns 9410-10659) for cracks prior to each flight (SB-108, SB-110, supersedes 2021-19-08) 2022-12-08 Inspect & modify engine RPM sensor wiring (SB-111; AMOC to AD 2022-12-08 dated 2025.06.23, AMOC to AD 2022-12-08 dated 2024.06.13, AMOC to AD 2022-12-08 dated 2022.08.05) 2020-18-08 R44 II engine air induction hose pn A785-31, inspect (SB-97, supersedes 2019-12-18) 2020-08-10 Inspect C029-2 TR blades (last delivered DEC 2011) for cracks prior to each flight 2016-26-04 Alter C016-7 Rev AA-AE MRBs (SB-89) 2014-23-16 Inspect C016-2,-5 MRBs, retire by JAN 2020 (SB-72A, SB-61, SL-32B, supersedes 2011-12-10) 2013-05-15 R44 & R44 II w/emergency floats D757-1 inflation valve w/ D758-1 C or prior housing (SB-80) 2010-24-03 R44 s/n 0001-1200 w/ >2200h TTIS, tail rotor pedal bearing block supports (SB-63) 2007-11-01 C628-4 seat belt buckle assy Rev M or prior 2003-24-51 NAS6605-31 bolts marked "01DO" (SB-51) 2003-04-05 C031-1 Rev G & prior pitch control (SB-43A) 2001-20-18 C044-1 horizontal stabilizers S/Ns 0009-0224 (SB-39) 2000-08-04 C188-3 sprag clutch S/Ns 0003-0505 (SB-32 & SB-36) 2000-07-03 Wire harness contacting A762-2 fuel line assy (SB-68) 99-23-01 A756-6 Rev N/prior grip (SB-17; supersedes 98-21-36) 99-17-17 C908-1C yokes Lots 36B, 37, & 38 (SB-35) 99-13-11 Aux fuel tank drain tube shutoff clamp & placard (SB-30) 99-07-18 C188-3 sprag clutches S/Ns 0003-0452 (SB-32) 98-22-16 Install C016-2 MR blades (SB-28A; supersedes 98-12-19) 98-05-10 Replace oil cooler line engine-mounted aluminum elbows with steel elbows (SB-25) 98-04-12 Lateral trim spring shaft inspection (SB-26) Rev: 15 July 2025 (Hyperlink corrections, various edits) U.S. AIRWORTHINESS DIRECTIVES (see also FAA Advisory Circular 39-7D) Page 4 of 7 Robinson R44-series helicopters (TCDS H11NM): 97-16-02 Actuator switch inspection, replace clutch assy (SB-21 & SB-23)
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97-02-15 Rotor RPM warning change, POH revision (supersedes 96-11-09) 96-18-22 C006-1 Rev A thru P main rotor gearboxes (SB-15) 95-26-05 R1 Rescinds 95-26-05 (supersedes 95-04-13 & 95-02-04) 95-11-10 POH change & Low-G placard installation (SB-6) 95-09-07 Push-pull tube roller guide installation (SB-4) 94-26-10 Cyclic control parts (supersedes 94-17-18) Rev: 15 July 2025 (Hyperlink corrections, various edits) U.S. AIRWORTHINESS DIRECTIVES (see also FAA Advisory Circular 39-7D) Page 5 of 7 Robinson R66 helicopters (TCDS R00015LA): 2024-04-02 Before the first flight of the day, check each F029-1 REV A thru F TRB tip cap area (SL-40A, SB-41C, AMOC to AD 2024-04-02 Ref. 772-25-00024) 2023-11-07 Restrictions on operations requiring radar altimeters, (SB-43, Statement to accompany AD 2023-11-07, supersedes AD 2021-23-13) 2022-19-12 Inspect F029-1 TR blades (S/Ns 2410-2589) for cracks prior to each flight (SB-40) 2021-04-12 Replace hanger bearing on D224-3 TR drive shaft (SB-20B) 2019-07-02 Remove oil tank, or modify tank outlet, as specified (SB-21A) 2016-26-04 Alter F016-2 Rev A-E MR blades (SB-13) Rev: 15 July 2025 (Hyperlink corrections, various edits) U.S. AIRWORTHINESS DIRECTIVES (see also FAA Advisory Circular 39-7D) Page 6 of 7 Engines: Lycoming O-320-B2C (TCDS E-274), O-360-J2A (TCDS E-286), O-540-F1B5 (TCDS E-295), IO-540-AE1A5 (TCDS 1E4) 2024-21-02 Connecting rod bushing inspections (SB-480F, SB-630B) 2017-16-11 Connecting rod non-conforming small end bushings (SB-632B) 2015-19-07 Externally mounted fuel injection lines (SB-342G; ss 2011-26-04, ex-2008-14-07) 2012-19-01 Crankshafts in specified s/n O-540 & IO-540 engines (SB-569A, SB-569A-S1, ex-2006-20-09) 2012-03-06 Fuel injection servo with PMA’d AFS fuel servo diaphragm (AFS-SB6; ex-2011-15-10) 2006-12-07 Non-Lycoming ECI “Classic cast” cylinder assemblies O-320/-360/-540-series only 2006-10-21 Non-Lycoming 360-/540-series ECI connecting rods P/N AEL11750 2005-19-11 360-/540-series crankshafts installed after March 1, 1999 (SB-566, SB-566-S1) 2004-10-14 Crankshaft gear (SB-475C, SB475C-S1; supersedes AD 91-14-22) 2004-05-24 540-series crankshaft gear retaining bolt (SB-554, SB-554-S5; supersedes 2002-23-06) 99-03-05 Crankshaft gear retaining bolt on O-540-F1B5 (R44 SB-29) 98-17-11 Crankshafts repaired by Nelson Balancing Service 98-02-08 Crankshaft corrosion (SB-505B; ref only- does not apply to helicopter installations) 97-15-11 Piston pins (SB-527C; supersedes 97-01-03) 96-23-03 Specified flange number high-pressure fuel pumps (SB-525A) 96-09-10 Iron/aluminum oil pump impellers (SB-524, SB-524-S1; supersedes 81-18-04 R2) 95-26-02 Fuel contamination (supersedes 94-14-13) 95-07-01 Non-Lycoming connecting rod bolts (O-360 & larger engines only) 92-12-05 Piston pins (SB-501B) 87-10-06 R1 Rocker arms (SB-477A) 75-08-09 Oil pump drive shaft and impeller (SB-524) 73-23-01 P/N 69650 piston pin failures (SB-367F) Rolls-Royce 250-C300/A1 (TCDS E4CE) 2022-10-06 Replace P/N RR30000240 4th-stage wheel as specified (supersedes 2017-18-14) Rev: 15 July 2025 (Hyperlink corrections, various edits) U.S. AIRWORTHINESS DIRECTIVES (see also FAA Advisory Circular 39-7D) Page 7 of 7 Appliances: ACS Products Company and Gerdes Products Company: 93-05-06 Ignition switch wear, corrosion, & lubrication check (RHC once used Gerdes p/n A510-2) AlliedSignal Inc: 98-14-03 King KT 76A p/n 066-1062-00/10/02 s/n 93,000-109,999 Am-Safe, Inc: 87-17-06 Seat belt/harness restraint connector (RHC SB 55; RHC has used p/n 501907-401 and -405) EON Corporation: 87-04-19 E6000 buckle assemblies, seat belt 80-05-04 E2900 & E8000 seat belts & harnesses Garmin International: 2005-01-19 GTX 330 Transponder software upgrade (supersedes 2004-10-15) 2001-23-17 GNS 430, specific s/n require circuitry change (SB 9905) Mechanical Products, Inc: 87-06-09 Circuit breakers, series 4001, 4200, 4310, & 8500 Precision Airmotive LLC (formerly FACET AEROSPACE, MARVEL-SCHEBLER, & BENDIX): 2009-02-03 RSA-10 fuel inj. servo’s 365533 gasket (MSB PRS-107, supersedes 2008-08-14, 2008-06-51) 98-01-06 Venturi replacement (supersedes 93-18-03) 93-19-04 Aftermarket CFS floats marked "10-91" (supersedes 92-15-16) 89-04-02 Replace 62-226 air metering stop pin 72-06-05 R2 Throttle arm inspection Continental Motors (formerly TCM, formerly BENDIX): 94-06-09 Capacitor p/n 10-349276 Lots 93-40 & 93-42 (TCM CSB 641) 94-01-03 R2 Replace coil, magnet (TCM MSB644; supersedes 73-07-04) 82-20-01 Impulse couplings with <300 operating hours (Bendix SB 623) 81-17-01 5-contact bushing starter vibrators (Bendix SB 614) 76-07-12 Ignition switches without 4-digit date codes (Bendix SB 583) 74-26-09 Magneto solid steel drive bushing (Bendix SB 556) United Instruments, Inc: 2017-04-06 Altimeter erroneous indication due to diaphragm leak 86-05-02 Altimeter non-synchronization 74-24-13 P/N 5932() & 5934(), specified s/n altimeters
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