HARTZELL PROPELLER INC. SERVICE BULLETIN HC-SB-61-227 Propeller - Hub Inspection

Piper PA-36 Pawnee Brave · Weight And Balance

Free account — keep the POHs & checklists you reference in one place.

Overview

This document is a service bulletin from Hartzell Propeller Inc. detailing inspection and maintenance requirements for specific propeller hubs. It primarily addresses the Hartzell two-blade, aluminum hub, 'compact' series propellers manufactured before April 1997, particularly those installed on various aircraft, including the Piper PA-32 series. The bulletin outlines the necessary inspections, compliance requirements, and potential actions for propellers that may exhibit signs of wear or failure. It emphasizes the importance of adhering to the latest revision to ensure safety and compliance with FAA regulations. The document includes detailed instructions for inspections, hub replacements, and modifications to ensure continued airworthiness of the propeller systems.

Propellers manufactured before April 1997 without 'A' or 'B' suffixes require mandatory inspections.
Initial eddy current inspections must be performed within 50 hours of operation, with subsequent inspections every 100 hours.
Installation of a hub with a 'B' suffix or modification to an oil-filled configuration increases weight by 0.50 lb (0.23 kg).
Hubs with an 'A' suffix must be replaced at the next overhaul, not to exceed 1000 hours or 72 months from the effective date of the directive.
Only qualified personnel should perform hub inspections and replacements.

Document

Source

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

View original at hartzellprop.com

Report a problem or request removal

Document details

Type: Weight And Balance
Year: 2012
Pages: 22
File size: 370 KB
Publisher: hartzellprop.com

Documentation completeness

4/7

Most owners only have the POH. Here's the essential set for the Piper PA-36 Pawnee Brave.

Pilot's Operating Handbook / AFM
Checklist
Maintenance Manual
Parts Catalog (IPC)
Systems & Wiring
Service Bulletins
Type Certificate (TCDS)

More Piper PA-36 Pawnee Bravemanuals & documents

See all 14 →

In this document

Planning Information

This section outlines the effectivity of the service bulletin, indicating that it applies to Hartzell propellers manufactured before April 1997 without an 'A' or 'B' suffix. It lists affected aircraft types, including aerobatic and agricultural aircraft, and specifies that propellers with a 'B' suffix are not affected. The section also emphasizes the importance of using the most recent revision of the bulletin for compliance.

Compliance Requirements

The compliance section details the inspection intervals for propeller hubs without 'A' or 'B' suffixes, requiring an initial eddy current inspection within 50 hours of operation and subsequent inspections every 100 hours. It also discusses the mandatory replacement of 'A' suffix hubs and provides guidelines for optional modifications to the oil-filled configuration.

Weight and Balance

This section notes that the installation of a hub with a 'B' suffix or modification to an oil-filled configuration results in a weight increase of 0.50 lb (0.23 kg). This information is crucial for pilots and maintenance personnel to consider when calculating the aircraft's weight and balance.

Inspection Procedures

The document provides detailed procedures for inspecting the propeller hub fillet radius, including on-wing inspection methods and the necessary qualifications for personnel performing the inspections. It emphasizes the importance of identifying any cracks or abnormalities during inspections.

Hub Replacement

This section outlines the procedures for replacing propeller hubs, emphasizing that only qualified personnel should perform these tasks. It specifies that hubs without a 'B' suffix must not be reused on non-compliant aircraft and provides instructions for documenting compliance in the propeller logbook.

Safety notes

Failure to comply with this service bulletin may create an unsafe condition that could result in death or serious injury.
Unusual grease leakage or vibration may indicate a failing propeller blade or hub, requiring immediate inspection.

Full document text

HARTZELL PROPELLER INC. SERVICE BULLETIN TRANSMITTAL SHEET HC-SB-61-227 Propeller - Hub Inspection August 27, 2012 This page transmits a revision to Service Bulletin HC-SB-61-227. • Original Issue, dated Jan 16/98 • Revision 1, dated May 18/99 • Revision 2, dated May 8/00 • Revision 3, dated Apr 18/05 • Revision 4, dated Oct 04/05 • Revision 5, dated Sep 28/06 • Revision 6, dated Aug 27/12 Propeller assemblies that have previously complied with the terminating action specified in a previous version of this Service Bulletin are not affected. Propeller assemblies that have not previously complied with the terminating action specified in a previous version of this Service Bulletin are affected. FAA approval has been obtained on technical data in this publication that affects type design. Changes are shown by a change bar in the left margin of the revised pages. This revision is issued to change the following in the Service Bulletin: - Adds an optional Terminating Action for conversion of hubs without an "A" or "B" serial number suffix to an oil-filled configuration - Revises the document to latest caution and format requirements This Service Bulletin is reissued in its entirety. HARTZELL PROPELLER INC. SERVICE BULLETIN TRANSMITTAL SHEET HC-SB-61-227 Propeller - Hub Inspection (This page is intentionally blank.) HARTZELL PROPELLER INC. SERVICE BULLETIN HC-SB-61-227 Propeller - Hub Inspection Jan 16/98 HC-SB-61-227 Revision 6, dated Aug 27/12 Page 1 of 20 1. Planning Information A. Effectivity CAUTION: DO NOT USE OBSOLETE OR OUTDATED INFORMATION. PERFORM ALL INSPECTIONS OR WORK IN ACCORDANCE WITH THE MOST RECENT REVISION OF THIS SERVICE BULLETIN. INFORMATION CONTAINED IN THIS SERVICE BULLETIN MAY BE SIGNIFICANTLY CHANGED FROM EARLIER REVISIONS. FAILURE TO COMPLY WITH THIS SERVICE BULLETIN OR THE USE OF OBSOLETE INFORMATION MAY CREATE AN UNSAFE CONDITION THAT MAY RESULT IN DEATH, SERIOUS BODILY INJURY, AND/OR SUBSTANTIAL PROPERTY DAMAGE. REFER TO THE SERVICE BULLETIN INDEX FOR THE MOST RECENT REVISION LEVEL OF THIS SERVICE BULLETIN. (1) Hartzell two blade, aluminum hub, "compact" ( )HC-( )2Y( )-( ) series propellers manufactured before April 1997 and have no suffix letter, or have an "A" or "E" suffix letter at the end of the hub and propeller serial number and installed on the following applications are affected by this Service Bulletin. (a) Aerobatic aircraft (including certificated aerobatic aircraft, military trainers, or any aircraft routinely exposed to aerobatic usage) (b) Agricultural aircraft (c) Piper PA-32( ) series aircraft with Lycoming 540 series engines rated at 300 HP or higher (d) Britten Norman BN-2( ) series aircraft with Lycoming 540 series engines NOTE 1: These propellers are installed on, but not limited to, the aircraft applications listed in Table 2. NOTE 2: The parenthesis shown in the model designations throughout this Service Bulletin indicate letter(s) or number(s) that may or may not be present because of different configurations permitted on the various aircraft installations. Definition of propeller model designations and further details of letter(s) or number(s) that may be present are shown in Figure 1. © 1998, 1999, 2000, 2005, 2006, 2012 - Hartzell Propeller Inc. - All rights reserved HARTZELL PROPELLER INC. SERVICE BULLETIN HC-SB-61-227 Propeller - Hub Inspection Jan 16/98 HC-SB-61-227 Revision 6, dated Aug 27/12 Page 2 of 20 NOTE 3: Propellers manufactured after April 1997 have a suffix letter "B" at the end of the hub and propeller serial numbers. Hub serial numbers without suffix letter "A" or "B" were manufactured before 1991 and can be identified by two different styles of the fillet radius as shown in Figure 2. "A" suffix serial number hubs can be identified by the fillet radius shown in Figure 2. These hubs have been produced from December 1991 through April 1997. Additional "A" suffix hub serial numbers are shown in Table 1. These hubs have been modified and differ slightly in appearance from those shown in Figure 2. "B" suffix serial number hubs are identified by the lack of a fillet radius at the blade socket shown in Figure 2. These hubs are current production made since April 1997. The "E" suffix letter is added to the hub serial number to indicate that the initial eddy current inspection has been performed and a repetitive eddy current inspection is required. (2) Propellers with a suffix letter "B" at the end of the hub and propeller serial number are not affected by this Service Bulletin. (3) Applications that have NOT previously complied with the terminating action in a previous revision of this Service Bulletin or with the terminating action in FAA Airworthiness Directive 2001-23-08 ARE affected by this Service Bulletin. (4) Applications that have previously complied with the terminating action in a previous revision of this Service Bulletin or with the terminating action in FAA Airworthiness Directive 2001-23-08 are NOT affected by this Service Bulletin. B. Concurrent Requirements (1) Installation of a "B" serial number suffix hub will require spinner bulkhead modification or replacement in accordance with the Repair/Modification chapter of Hartzell Spinner Assembly Maintenance Manual 127 (61-16-27). (a) Applications with non-Hartzell spinner assemblies should contact the applicable Type Certificate holder for rework instructions. (2) Additional service documents may apply to the components/propellers affected by this Service Bulletin. Compliance with additional service documents may be necessary in conjunction with the completion of the Accomplishment Instructions in this Service Bulletin. Refer to the Hartzell Propeller website at www.hartzellprop.com for a cross-reference of service documents. HARTZELL PROPELLER INC. SERVICE BULLETIN HC-SB-61-227 Propeller - Hub Inspection Jan 16/98 HC-SB-61-227 Revision 6, dated Aug 27/12 Page 3 of 20 Model Designations for Aluminum Hub, Reciprocating Engine Propellers

Show full text

Figure 1 FLANGE DISTANCE FROM HUB DESIGNATION PARTING LINE TO FLANGE FACE C - STANDARD HUB D,F 3.250 IN (82.55 MM) K,R,L 4.187 IN (106.34 MM) N 3.375 IN (85.72 MM) E - EXTENDED HUB F 7.250 IN (184.15 MM) K,R,L 9.187 IN (233.34 MM) N 8.375 IN (212.73 MM) F - EXTENDED HUB R,L 7.187 IN (182.55 MM) G - EXTENDED HUB F 4.250 IN (107.95 MM) H - EXTENDED HUB F,N 7.500 IN (190.50 MM) I - EXTENDED HUB R 6.187 IN (157.15 MM) F 5.250 IN (133.35 MM) J - EXTENDED HUB F 6.500 IN (165.10 MM) L - EXTENDED HUB F 3.750 IN (95.25 MM) M - EXTENDED HUB R,L 6.750 IN (171.45 MM) BASIC DESIGN CHARACTERISTIC DOWEL LOCATION with respect to # 1 blade, viewed clockwise facing propeller flange: BLANK - 90 AND 270 DEGREES - CONTINENTAL, 0 AND 180 DEGREES - LYCOMING B - 30 AND 210 DEGREES - CONTINENTAL, FRANKLIN AND PORSCHE C - 150 AND 330 DEGREES - CONTINENTAL AND LYCOMING D - 60 AND 240 DEGREES - CONTINENTAL E - 0 AND 180 DEGREES AND PROPELLER LABEL ALIGNED WITH ENGINE TC MARKS - CONTINENTAL P - 0 AND 180 DEGREES AND PROPELLER LABEL ALIGNED WITH ENGINE TC MARKS - CONTINENTAL B HC - C 2 Y F - 1 BF NO. OF BLADES HUB MOUNTING FLANGE BLADE SHANK TYPE (ALUMINUM BLADES) OR BLADE RETENTION SYSTEM (COMPOSITE BLADES) "Y" SHANK RETENTION SYSTEM, ALUMINUM BLADE, INTEGRAL PITCH CHANGE ARM "Y" SHANK RETENTION SYSTEM, COMPOSITE BLADE, INTEGRAL OR BOLT ON PITCH CHANGE ARM BOLT DOWELS NO. OF BOLTS TYPICAL ENGINE CIRCLE - inch NO. DIAMETER OR STUDS F 4.00 2 1/2 6 (1/2 inch) CONTINENTAL K 4.75 2 3/4 6 (1/2 inch) LYCOMING 360/540 L 4.75 2 5/8 6 (7/16 inch) LYCOMING 290/320 N 4.25 2 1/2 8 (9/16 inch) GTSI0520 R 4.75 2 3/4 6 (1/2 inch) LYCOMING D 4.00 0 1/2 8 (1/2 inch) CONTINENTAL GTSIO-520 HC HARTZELL CONTROLLABLE HARTZELL PROPELLER INC. SERVICE BULLETIN HC-SB-61-227 Propeller - Hub Inspection Jan 16/98 HC-SB-61-227 Revision 6, dated Aug 27/12 Page 4 of 20 "Fillet radius" on hubs made between 1983 and 1991. Serial number has no suffix letter. Hub Identification Figure 2 Left side of hub from No. 1 blade Propeller serial number Right side of hub from No. 1 blade Hub serial number Hubs made December 1991 thru April 1997, have the suffix "A" in the serial number (See additional "A" suffix hubs in Table 1) Current hub design, has the suffix "B" in the serial number and is not affected by this Service Bulletin, "fillet radius" not present on "B" serial number suffix hubs Ser No. CH12345A Ser No. CH12345A A12345A A12345A "Fillet radius" on hubs made before 1983. Serial number has no suffix letter. A12345A A12345A Location of lubrication fittings after 1983 Location of lubrication fittings before 1983 A12345A A12345A Blade Number 1 HARTZELL PROPELLER INC. SERVICE BULLETIN HC-SB-61-227 Propeller - Hub Inspection Jan 16/98 HC-SB-61-227 Revision 6, dated Aug 27/12 Page 5 of 20 C. Reason WARNING: UNUSUAL OR ABNORMAL GREASE LEAKAGE OR VIBRATION, WHERE THE CONDITION INITIATED SUDDENLY, CAN BE AN INDICATION OF A FAILING PROPELLER BLADE OR BLADE RETENTION COMPONENT. AN INFLIGHT BLADE SEPARATION MAY RESULT IN DEATH, SERIOUS BODILY INJURY, AND/OR SUBSTANTIAL PROPERTY DAMAGE. UNUSUAL OR ABNORMAL GREASE LEAKAGE OR VIBRATION DEMANDS IMMEDIATE INSPECTION FOR POSSIBLE CRACKED HUB (FOR FURTHER INFORMATION ON THIS SUBJECT SEE HARTZELL SERVICE LETTER HC-SL-61-165). (1) There have been numerous occurrences of hub fillet radius cracks, including incidents of in-flight blade separation in Hartzell two blade "compact" series aluminum hub propellers. Cracks were typically discovered during an inspection following reports of abnormal vibration or grease leakage. Cracks typically initiate in the same region of the hub in the area adjacent to the blade called the "fillet radius". As the cracks propagate toward the center of the hub, their progression accelerates and may result in the failure of one hub half that can progress to blade separation. (2) Several of these events have occurred after the issuance of Hartzell Service Bulletin 164, FAA Airworthiness Directive 90-02-23, both of which required a 50 hour repetitive visual inspection of the hub. Because these cracks have proven difficult to detect visually, this Service Bulletin was issued to replace Service Bulletin 164 and requires a repetitive eddy current inspection. FAA enforced Revision 2 of this Service Bulletin through their issuance of Airworthiness Directive 2001-23-08. (3) Because of continuing events, Revision 3 to this Service Bulletin was released to require a reduction in the repetitive inspection interval and to expand the inspection region from what was required in AD2001-23-08. (4) Three of the recent cracked hubs occurred on hubs with an "A" serial number suffix. All three of these hubs cracked in the rear hub half, whereas the failures seen in the earlier design hub (without a serial number suffix) occurred on the front hub half. The design changes indicated by the "A" suffix are considered an improvement over the original, earlier design, but this evidence suggests that installation of "A" suffix hubs may not be a solution to the cracking problem. To alleviate concerns over the "A" hub design, and because the rear of the hub is not easily inspected, there is a requirement to replace all "A" suffix hubs with the current design "B" suffix hub. (5) Updated regulatory action is not expected. HARTZELL PROPELLER INC. SERVICE BULLETIN HC-SB-61-227 Propeller - Hub Inspection Jan 16/98 HC-SB-61-227 Revision 6, dated Aug 27/12 Page 6 of 20 D. Description (1) This document provides Instructions for Continued Airworthiness (ICA). (2) The inspection area has been expanded to include the surface surrounding the balance weight attachment hole, the unchamfered area surrounding the hub clamping bolt hole, and hub fillet radius. The balance weight attachment hole and hub clamping bolt hole do not require eddy current inspection. (3) This Service Bulletin provides requirements for: (a) An initial and recurring eddy current inspection of the propeller hub fillet radius of hubs that do not have an "A" or "B" serial number suffix. (b) An initial and recurring eddy current inspection of the propeller hub fillet radius of "A" suffix hubs listed in Table 1 of this Service Bulletin. (c) Optional replacement of the hub as a terminating action for hubs that do not have an "A" or "B" serial number suffix. (d) Mandatory replacement of "A" suffix hubs, including those hubs listed in Table 1 of this Service Bulletin. (4) Revision 4 reduced the repetitive interval for the eddy current inspection. (5) Revision 6 introduces the optional terminating action of converting to the oil-filled configuration for hubs without an "A" or "B" suffix serial number. E. Compliance (1) Hubs without "A" or "B" serial number suffix (Hubs made before December 1991 - see Figure 2) (a) Perform the expanded eddy current inspection described in this revision within the next 50 hours of operation since the last inspection performed in accordance with Hartzell Service Bulletins 164( ) or HC-SB-61-227 or Airworthiness Directives 90-02-23 or 2001-23-08 or within 50 hours from the effective date of this Service Bulletin, whichever occurs first. (b) After the initial inspection perform the eddy current inspection described in this revision at intervals not to exceed 100 hours of operation. NOTE: A propeller hub from an aircraft that is affected by this Service Bulletin is not to be removed and reused on another aircraft application that does not have such inspection requirements. Such hub interchangeability is no longer authorized for the applications listed in Effectivity paragraph 1.A.(1). If propeller service history or other records indicate that such a replacement was made in the past, then the 100 hour repetitive inspection should be continued regardless of aircraft model installed. HARTZELL PROPELLER INC. SERVICE BULLETIN HC-SB-61-227 Propeller - Hub Inspection Jan 16/98 HC-SB-61-227 Revision 6, dated Aug 27/12 Page 7 of 20 (c) Optional Terminating Action - Replacement of the propeller hub with a "B" suffix serial number hub is a terminating action for this Service Bulletin. These hubs have a different part number and are identified by suffix letter "B" at the end of the propeller serial number. Refer to section 2. Material Information, for part number information. (d) Optional Terminating Action - Modification of the propeller hub to the oil-filled configuration in accordance with Hartzell Service Letter HC-SL-61-273. 1 Modification of the affected propeller to the oil-filled configuration, in accordance with Hartzell Service Letter HC-SL-61-273, is an optional terminating action for the inspection requirements specified in this Service Bulletin. 2 A propeller that has been modified to the oil-filled configuration, in accordance with this Service Bulletin and Hartzell Service Letter HC-SL-61-273, must not be installed on any other application, including experimental. (2) "A" suffix hubs listed in Table 1. (a) Perform the eddy current inspection described in this document within the next 50 hours of operation since the last inspection performed in accordance with Hartzell Service Bulletins 164( ) or HC-SB-61-227 or Airworthiness Directives 90-02-03 or 2001-23-08 or within 50 hours from the date of this Service Bulletin, whichever occurs first. (b) After the initial inspection, perform the eddy current inspection described in this revision at intervals not to exceed 100 hours of operation. (c) Replace the hub with a "B" suffix hub at the next overhaul, not to exceed 1000 hours or 72 months from December 24, 2001, the effective date of Airworthiness Directive 2001-23-08. NOTE: A propeller hub from an aircraft that is affected by this Service Bulletin is not to be removed and reused on another aircraft application that does not have such inspection requirements. HARTZELL PROPELLER INC. SERVICE BULLETIN HC-SB-61-227 Propeller - Hub Inspection Jan 16/98 HC-SB-61-227 Revision 6, dated Aug 27/12 Page 8 of 20 (3) "A" suffix hubs not listed in Table 1 (Hubs made between December 1991 and April 1997 - see Figure 2) (a) Non-agricultural, Non-aerobatic applications: Replace the hub at the next overhaul, not to exceed 2000 hours or 72 months from December 24, 2001, the effective date of Airworthiness Directive 2001-23-08. (b) Agricultural applications: Replace the hub at next overhaul, not to exceed 2000 hours or 36 months from December 24, 2001, the effective date of Airworthiness Directive 2001-23-08. (c) Aerobatic applications: Replace the hub at next overhaul, not to exceed 1000 hours or 72 months from December 24, 2001, the effective date of Airworthiness Directive 2001-23-08. NOTE: A propeller hub from an aircraft that is affected by this Service Bulletin is not to be removed and reused on another aircraft application that does not have such inspection requirements. F. Approval (1) This Service Bulletin is approved by the Manager, FAA, Chicago Aircraft Certification Office, ACE 115C, by approval document dated August 27, 2012 as an alternate method of compliance with Airworthiness Directive 2001-23-08 as follows: (a) This Service Bulletin is an alternate method of compliance for AD 2001-23-08 paragraphs (a) through (e). (b) This revision to the Service Bulletin includes an additional alternate method of compliance for AD 2001-23-08 paragraph (e), Terminating Action. G. Manpower (1) Eddy current inspection on-wing Eddy Current Inspection 0.5 Man-hours Spinner dome removal and installation 0.5 man-hours Total man-hours 1.0 man-hours (2) Propeller hub replacement: Propeller Removal/Installation 2.0 man-hours Propeller Hub Replacement 6.0 man-hours Total man-hours 8.0 man-hours NOTE: Hub replacement, when accomplished in conjunction with propeller overhaul, requires no additional labor. HARTZELL PROPELLER INC. SERVICE BULLETIN HC-SB-61-227 Propeller - Hub Inspection Jan 16/98 HC-SB-61-227 Revision 6, dated Aug 27/12 Page 9 of 20 (3) Spinner bulkhead modification 3.0 man-hours (if required because of hub replacement) (4) Propeller hub modification: Propeller Removal/Installation 2.0 man-hours Propeller Disassembly/Assembly 4.0 man-hours Propeller Hub Modification 2.0 man-hours Total man-hours 8.0 man-hours If required, Teflon Removal/Installation 1.0 man-hours per blade NOTE: Hub disassembly/assembly and Teflon® removal/installation do not require additional labor when accomplished in conjunction with propeller overhaul. H. Weight and Balance (1) There is a 0.50 lb. (0.23 kg) increase in weight with installation of a hub with suffix letter "B" in the serial number. (2) There is a 0.50 lb. (0.23 kg) increase in weight with hub modification to the oil-filled configuration. I. Electrical Load Data (1) Not Changed J. References (1) Hartzell Standard Practices Manual 202A (61-01-02) (2) Hartzell Propeller Owner's Manual 115 (61-00-15) (3) Hartzell Propeller Owner's Manual 145 (61-00-45) (4) Hartzell Compact and Lightweight Compact Non-Feathering (-1) and Aerobatic (-4) Propeller Overhaul and Maintenance Manual 113B (61-10-13) (5) Hartzell Compact Constant Speed and Feathering Propeller Overhaul Manual 117D (61-10-17) (6) Hartzell Metal Spinner Maintenance Manual 127 (61-16-27) (7) Hartzell Service Letter HC-SL-61-273 (8) Airworthiness Directive 90-02-23 (9) Airworthiness Directive 2001-23-08 K. Other Publications Affected None HARTZELL PROPELLER INC. SERVICE BULLETIN HC-SB-61-227 Propeller - Hub Inspection Jan 16/98 HC-SB-61-227 Revision 6, dated Aug 27/12 Page 10 of 20 Socket Fillet Radius Inspection Figure 3 Circled areas encompass the "fillet radius", must be inspected. Hubs with no "A" or "B" serial number suffix, and hubs listed in Table 1: Inspect highlighted area on each blade socket (forward hub half) during on-wing inspection, and four points (both hub halves) during overhaul inspection. Inspect the shaded area Balance weight hole Hub clamping bolt hole Inspect the shaded area Typical crack NOTE: The hub clamping bolt holes and the balance weight holes are not included in the areas to be inspected. W10571D.eps cir.eps HARTZELL PROPELLER INC. SERVICE BULLETIN HC-SB-61-227 Propeller - Hub Inspection Jan 16/98 HC-SB-61-227 Revision 6, dated Aug 27/12 Page 11 of 20 2. Material Information A. Parts Required (1) If the hub is replaced, see the hub replacement information below. Previous Hub Part Number Description Replacement Hub Part Number D-2201-1 Hub Unit D-6531-41 D-2201-2 Hub Unit D-6522-21 D-2201-2R Hub Unit D-6522-21R D-2201-3 Hub Unit D-6529-41 D-2201-5 Hub Unit D-6531-42 D-2201-6 Hub Unit D-6522-22 D-2201-7 Hub Unit D-6529-42 D-2201-16 Hub Unit D-6522-21 D-2201-16R Hub Unit D-6522-21R D-2201-17 Hub Unit D-6529-41 D-2201-24 Hub Unit D-6530-30 D-2477-3 Hub Unit D-6564-21 D-4214 Hub Unit D-6557-42 (2) Refer to Hartzell Metal Spinner Maintenance Manual 127 (61-16-27) for spinner bulkhead replacement part numbers and/or modification information. B. Special Tooling (1) An Eddy Current Instrument is required. Refer to Hartzell Standard Practices Manual 202A (61-01-02) for details. C. Material Necessary for Propeller Modification to the oil-filled configuration: (1) Refer to Hartzell Service Letter HC-SL-61-273 for a complete list of requirements. HARTZELL PROPELLER INC. SERVICE BULLETIN HC-SB-61-227 Propeller - Hub Inspection Jan 16/98 HC-SB-61-227 Revision 6, dated Aug 27/12 Page 12 of 20 3. Accomplishment Instructions A. Hub Inspection - Hubs without an "A" or "B" serial number suffix (1) Inspection of the fillet radii of the (front) cylinder half of the propeller hub may be performed "on-wing" without removing the propeller from the engine. (2) This inspection must be performed by qualified personnel at an appropriately licensed propeller service facility or a certificated aircraft mechanic with an eddy current qualification in accordance with the Eddy Current Inspection chapter of Hartzell Standard Practices Manual 202A. (3) If inspection is performed during propeller overhaul or if the propeller has been removed from the aircraft and disassembled, both halves of the hub are to be inspected. (4) On-Wing inspection procedure - Hubs without "A" or "B" serial number suffix : (a) Remove the spinner dome in accordance with the applicable owner's manual. (b) If the propeller has blade counterweights, position the blades to provide maximum exposure of the forward hub half fillet radius area. NOTE: If the propeller does not have blade counterweights, special positioning of blades is not required. 1 For propellers models ( )HC-( )2Y( )-2( ) with counterweighted propeller blades, perform engine run and shut down with propeller blades in the feathered position. This will position the blade counterweights to provide maximum exposure of the forward hub half fillet radius area. HARTZELL PROPELLER INC. SERVICE BULLETIN HC-SB-61-227 Propeller - Hub Inspection Jan 16/98 HC-SB-61-227 Revision 6, dated Aug 27/12 Page 13 of 20 WARNING 1: DO NOT USE BLADE PADDLES TO FEATHER THE PROPELLER. IT IS POSSIBLE FOR EXCESSIVE LOADS TO BE APPLIED WITH BLADE PADDLES AND RESULT IN HIDDEN DAMAGE TO THE PITCH CHANGE MECHANISM. WARNING 2: CARE MUST BE TAKEN TO UNFEATHER THE PROPELLER IN ACCORDANCE WITH SECTION 3.(A)(7). 2 For propellers models ( )HC-( )2Y( )-4( ) with counterweighted propeller blades (used on acrobatic aircraft), manually turn blades from high to low pitch to move the counterweight away from the inspection area (there is no pitch return spring in these propeller models and the blades can be turned manually without the use of blade paddles). This will position the blade counterweights to provide maximum exposure of the forward hub half fillet radius area. CAUTION: BALANCE WEIGHTS MUST BE RETURNED TO THE SAME LOCATION ON THE HUB FROM WHICH THEY WERE REMOVED. (c) Remove balance weights and make note of location as necessary. NOTE: ( )HC-( )2Y( )-(2,4)( ) propellers with balance weights installed may require removal from the aircraft for disassembly to permit removal of the balance weights behind counterweights. (d) Before any cleaning, visually inspect for a cracked hub in the area of the hub fillet radii (a cracked hub can have traces of grease coming from the crack making the crack more visible). (e) Clean the surface of the hub to remove oil, grease, or other contaminants that may interfere with the efficiency of the eddy current inspection. NOTE: Paint removal is not required for eddy current inspection. (f) Perform eddy current inspection in accordance with procedures in Hartzell Standard Practices Manual 202A. See Figure 3. NOTE: The inspection area has been expanded to include the surface surrounding the balance weight attachment hole, the unchamfered area surrounding the hub clamping bolt hole, and hub fillet radius. The balance weight attachment hole and hub clamping bolt hole do not require eddy current inspection. HARTZELL PROPELLER INC. SERVICE BULLETIN HC-SB-61-227 Propeller - Hub Inspection Jan 16/98 HC-SB-61-227 Revision 6, dated Aug 27/12 Page 14 of 20 DN3607A DN3609A DN3613A DN3615A DN3628A DN3630A DN3641A DN3940A DN3944A DN3949A DN3962A The following hubs, part number D-2201-16, were shipped to British Aerospace for intended use on BAE 125 Bulldog aircraft. These hubs were reworked to have the post-1991 style "fillet radius". BAE 125 Bulldog Table 1 (5) If a crack indication is found, hub replacement is required before further flight. Report any findings of a cracked hub to the Hartzell Propeller Product Support Department. (6) If no crack indications are found, (a) After the first inspection only, permanently identify the hub to indicate compliance with this Service Bulletin. Use a metal impression stamp (0.125 inch [3.175 mm]), round bottom characters) to stamp the letter E at the end of the propeller serial number. For example, propeller serial number DN1234 would be changed to DN1234E. This change is to be noted in the propeller logbook so that it provides further indication that this Service Bulletin is applicable. CAUTION: BALANCE WEIGHTS MUST BE RETURNED TO THE SAME LOCATION ON THE HUB FROM WHICH THEY WERE REMOVED. (b) Reinstall balance weights and fasteners from the location they were removed. Refer to the Static and Dynamic Balance chapter of Hartzell Standard Practices Manual 202A (61-01-02). (7) If the blades were required to be placed in feather position to perform this inspection, the blades may be unfeathered using the procedure below: (a) Remove the valve cap. (b) Using a suitable device, depress the valve stem to relieve the air charge from the cylinder. HARTZELL PROPELLER INC. SERVICE BULLETIN HC-SB-61-227 Propeller - Hub Inspection Jan 16/98 HC-SB-61-227 Revision 6, dated Aug 27/12 Page 15 of 20 CAUTION 1: REPOSITION BLADES WITH CARE. DO NOT USE A SINGLE BLADE PADDLE TO REPOSITION BLADES. IT IS POSSIBLE FOR EXCESSIVE LOADS TO BE APPLIED WITH BLADE PADDLES AND RESULT IN HIDDEN DAMAGE TO THE PITCH CHANGE MECHANISM. CAUTION 2: DO NOT PUT BLADE PADDLES ON DEICE BOOTS, AS BOOTS MAY BE DAMAGED. (c) Using a blade paddle on each blade, simultaneously move both blades from the feather position to the low pitch position. (d) Remove the blade paddles. (e) For propellers that use an air charge, recharge the cylinder in accordance with the applicable owner's manual. 1 Reinstall the air valve cover cap and spinner dome in accordance with the applicable owner's manual. (g) Proceed to section 3.A.(9). (8) If the blades were not required to be feathered to perform this inspection, reinstall the spinner dome in accordance with the applicable owner's manual. (9) Make an entry in the propeller logbook indicating compliance with the hub inspection requirement of this Service Bulletin noting the time for the next inspection. B. Hub Inspection - "A" Suffix Hubs Listed in Table 1. (1) Hubs listed in Table 1 of this bulletin are to be initially and repetitively inspected, until a terminating action is accomplished, using the procedure detailed in section 3.A. of this Service Bulletin. (2) Hubs listed in Table 1 of this bulletin must be replaced in accordance with section 1.E.(2) of this Service Bulletin. C. Hub Inspection - "A" Suffix Hubs Not Listed in Table 1. (1) No hub inspection is required for "A" suffix hubs. (2) "A" suffix hubs must be replaced in accordance with section 1.D.(3) of this Service Bulletin. HARTZELL PROPELLER INC. SERVICE BULLETIN HC-SB-61-227 Propeller - Hub Inspection Jan 16/98 HC-SB-61-227 Revision 6, dated Aug 27/12 Page 16 of 20 D. Hub Replacement (1) Hub replacement must be performed by qualified personnel at an appropriately licensed propeller service facility. Replacement of the existing hub with a hub identified by a "B" suffix letter in the propeller serial number is terminating action for this Service Bulletin. (2) Hubs without a "B" suffix in the serial number that are removed from aircraft applications affected by this Service Bulletin [as defined in Effectivity, section 1.A.(1)] must not be reused on another aircraft application that does not have such inspection requirements. A hub removed from an affected aircraft must either be installed on another affected application, or be retired in accordance with Hartzell Standard Practices Manual 202A (61-01-02). (3) For spinner bulkhead modification or replacement part numbers, refer to the Repair and Modification chapter of Hartzell Metal Spinner Maintenance Manual 127 (61-16-27). (4) Make an entry in the propeller logbook indicating compliance with the hub replacement instructions as terminating action for this Service Bulletin. E. Optional Propeller Modification to the Oil-filled Configuration WARNING: MODIFICATION TO THE OIL-FILLED CONFIGURATION IS ONLY APPROVED FOR PROPELLERS AFFECTED BY THIS SERVICE BULLETIN. (1) Affected propeller models without an "A" or "B" suffix serial number may be modified to the oil-filled configuration as terminating action for this Service Bulletin. (a) Modification of the propeller hub to the oil-filled configuration must be performed by qualified personnel at an appropriately licensed propeller service facility. (b) Modification of the propeller hub to the oil-filled configuration must be performed in accordance with Hartzell Service Letter HC-SL-61-273. (c) A propeller modified to the oil-filled configuration, must not be restored to the grease lubricated configuration. (2) Make an entry in the propeller logbook indicating compliance with the Propeller Modification to the Oil-filled Configuration instructions as terminating action for this Service Bulletin. F. Recommended Service Facilities (1) Hartzell Propeller has a worldwide network of Recommended Service Facilities that are recommended by Hartzell Propeller for overhaul and repair of our products. HARTZELL PROPELLER INC. SERVICE BULLETIN HC-SB-61-227 Propeller - Hub Inspection Jan 16/98 HC-SB-61-227 Revision 6, dated Aug 27/12 Page 17 of 20 (2) Each service facility must meet standard FAA requirements and additional Hartzell Propeller requirements before being recommended by Hartzell Propeller. Each service facility is audited by Hartzell Propeller to verify the continuation of the standards. (3) Hartzell Propeller recommends that you use one of these service facilities when having your propeller overhauled or repaired. (4) For a current list of Hartzell Propeller Recommended Service Facilities, contact Hartzell Product Support or refer to the Hartzell Propeller website at www.hartzellprop.com. G. Contact Information Hartzell Propeller Inc. Attn.: Hartzell Product Support One Propeller Place Piqua, Ohio 45356-2634 USA Phone: (001) 937.778.4379 Fax: (001) 937.778.4391 E-mail: techsupport@hartzellprop.com HARTZELL PROPELLER INC. SERVICE BULLETIN HC-SB-61-227 Propeller - Hub Inspection Jan 16/98 HC-SB-61-227 Revision 6, dated Aug 27/12 Page 18 of 20 Aerospatiale (Morane Saulnier) MS893A, E , 180GT 7A14 O-360-A1A HC-C2YK-1B 7666A-2 Aerospatiale (Socata) TB-30 EPSILON Unknown AEIO-540-L1B5D HC-C2YR-4CF FC8475-6 Akrotech G-200 Experimental AEIO-360-A1E HC-C2YR-1A 7690C G-200 Experimental AEIO-360-A1E HC-C2YR-1AX2 7690C American Champion (Bellanca) DW-1 EAGLE Unknown IO-540-M1B5D HC-C2YR-1BF F8475R 8GCBC SCOUT STC-SA530AL O-360-C2A, C1A, C2E, C1E HC-C2YR-1BF F7666A 8GCBC SCOUT A21CE O-360-C2A,C2E,C1A,C1E HC-C2YR-1BF 7666A 8GCBCT SCOUT STC-SA530AL IO-360-C1A, C2A, C1E, C2E HC-C2YR-1 7666A 8KCAB DECATHLON A21CE AEIO-320-E1B; IO-320-E1(A,B) HC-C2YL-4F FC7663-4 8KCAB DECATHLON A23CE AEIO-320-E1B; IO-320-E1(A,B) HC-C2YL-4, -4F, -4BF FC7663-4 8KCAB DECATHLON A21CE AEIO-360-H1A HC-C2YR-4BF, -4CF FC7666A-2 Aviat EAGLE Experimental AEIO-360-A1D HC-C2YR-1A 7690A EAGLE Experimental AEIO-360-A1D HC-C2YK-4CF FC7666A-2, -4Q S-1T PITTS A8SO AEIO-360-A1D, -A1E HC-C2YK-4CF FC7666A-2 S-1T PITTS Experimental AEIO-360-A1E HC-C2YR-1A 7690C S-1T PITTS Experimental AEIO-360-A1E HC-C2YR-1AX1 7690C S-1T PITTS Experimental AEIO-360 Series HC-C2YR-8X1 7690C S-2A PITTS A8SO IO-360-A1A, AEIO-360-A1(A,E) HC-C2YK-4CF FC7666A-2 S-2A PITTS A8SO IO-360-A1A, AEIO-360-A1(A,E) HC-C2YK-4AF FC7666A-2 S-2S, S-2B PITTS A8SO AEIO-540-D4A5 HC-C2YR-4CF FC8477A-4 S-2A PITTS Experimental IO-360-A1A HC-C2YK-4CF FC7666A-2Q, -4Q S-2 PITTS Unknown IO-360-A1A HC-C2YK-4 C7666A S-2S PITTS Experimental AEIO-540-D4(A,B,C)5 HC-C2YR-4CF FC8477-6Q S-2S PITTS Experimental AEIO-540-D4A5 HC-C2YR-4CF FC8477 Beech A45 (T-34A), B-45 5A3 IO-470N BHC-L2YF-4F FC8468AR A45 (T-34A), B-45 STC-SA876CE IO-470N BHC-L2YF-4BF FC8468AR Britten Norman BN-2;BN-2A-6,8,9; A17EU O-540-E4C5 HC-C2YK-2BF, -2CUF (F)C8477(A)(B)-4, -6 BN-2(A,B)-26,27 BN-2A-2,3,20,21; BN-2B-20,21 A17EU IO-540-K1B5 HC-C2YK-2(B,C)(U)(F) (F)C8477(A)(B)-4 BN-2A MK III, MK III-2,-3 A29EU O-540-E4C5 HC-C2YK-2CUF FC8477A(B)-4 Cessna A188A, A188B, STC-SA8343SW IO-540-K1(A,B,G)5, -S1A5 HC-C2YR-1BF F8475R T188C AGWAGON DeHavilland CHIPMUNK Unknown IO-540-C4B5 HC-C2YK-4CF FC8477-4R Embraer EMB-200A Unknown O-540-H1B5D HC-C2YK-1BF F8477-4 EMB-201A, -202 Unknown IO-540-K1F5D, -K1J5D HC-C2YR-1BF F8475R Flug & Fahrzeugwerke AS 202/18A BRAVO A34EU AEIO-360-B1F HC-C2YK-1BF F7666A-2 AS 202/26A Experimental IO-540-D4B5 HC-C2YK-1BF F8477 Great Lakes 2T-1A-1, 2T-1A-2 A18EA IO-360-B1F6, AEIO-360-B1G6 HC-C2YK-4F FC7666A-2 2T-1A-2 A18EA IO-360-B1F6, AEIO-360-B1G6 HC-C2YK-4F FC7666A-2 AIRCRAFT MODEL FAA TC/STC NO. ENGINE PROPELLER BLADE Aircraft and Propeller Applications Table 2, page 1 of 3 NOTE: Affected propellers are installed on, but not limited to, the aircraft applications listed in Table 2. HARTZELL PROPELLER INC. SERVICE BULLETIN HC-SB-61-227 Propeller - Hub Inspection Jan 16/98 HC-SB-61-227 Revision 6, dated Aug 27/12 Page 19 of 20 Grob G115D Experimental AEIO-360-B1F HC-M2YR-1BF 7690E-2 G115T AEIO-540-D4A5 HC-C2YR-4CF FC8477A-4 Hindustan HPT 32 TRAINER Unknown AEIO-540-D4B5 HC-C2YR-4CF FC8477-4R Morovan Z-42 Unknown AIO-320-B1B HC-C2YL-4F FC7663A-4 Z-42 Unknown AIO-320 HC-C2YL-1B 7663A-4 526L A30EU AIO-360-B1B HC-C2YK-4 C7666A-2 Mudry CAP 20 Unknown AIO-360-B1A HC-C2YK-4F FC7666A Pacific Aerospace CT4A, CT4B Unknown IO-360-D, -H, -HB BHC-C2YF-1BF F7663 Piper PA-25-260 PAWNEE 2A8, 2A10 O-540-G1A5 HC-C2YK-1( )F F8477 PA-32-300, PA-32S-300 A3SO IO-540-K1A5, -K1G5 HC-C2YK-1( )F F8475R PA-32-300, PA-32S-300 A3SO IO-540-K1A5, -K1G5 HC-C2YK-1( )F F8475(D)-4 PA-32-300, PA-32S-300 A3SO IO-540-K1A5, -K1G5 HC-C2YK-1BF F8475R PA-32R-300, PA-32RT-300 A3SO IO-540-K1A5D, -K1G5D HC-C2YK-1()F F8475D-4 PA-32RT-300T LANCE A3SO TIO-540-S1AD HC-E2YR-1()F F8477-4 PA-32S-300 CHEROKEE SIX STC-SA932EA IO-540-K1A5 HC-C2YR-1BF F8475+2 PA-32-301 SARATOGA A3SO IO-540-K1G5 HC-C2YR-1()F F8475D-4 PA-32-301T TURBO SARATOGA A3SO TIO-540-S1AD HC-E2YR-1()F F8477-4 PA-32R-301 SARATOGA SP A3SO IO-540-K1G5D HC-C2YR-1() F8475D-4 PA-32R-301T T-SARATOGA SP A3SO TIO-540-S1AD HC-E2YR-1( )F F8477-4 PA-36-285 BRAVE A9SO, A10SO 6-285-B, C, BA, CA HC-C2YF-1BF F9587A PA-36-300 BRAVE A9SO, A10SO IO-540-K1G5 HC-C2YK-1( )F F8475R Saab-Scania AB MFI-15 SAFARI/SUPPORTER Unknown IO-360-A1B6 HC-C2YK-4BF FC7666A-2 MFI-17 MUSHAK Unknown TSIO-360-LB HC-C2YF-1BF F8459-9R Scottish Aviation (BAE) B.125 BULLDOG Unknown IO-360-A1B6 HC-C2YR-4BF FC7666A-2 Siai Marchetti (Augusta) S.205-18F, 18R A9EU O-360-A1A HC-C2YK-1B 7666A-2 S.205-20F, 20R A9EU IO-360-A1A HC-C2YK-1B 7666A-2 S.208, A A9EU IO-540-E4A5 HC-C2YK-1BF F8477-8R S.208, A A9EU IO-540-E4A5 HC-C2YK-1B 8467-8R S.208 Unknown O-540-E4A5 HC-C2YK-4F SF.260, SF.260B A10EU O-540-E4A5 HC-C2YK-1B 8467-8R SF.260, B, C, D A10EU O-540-E4A5, AEIO-540-D4A5 HC-C2YK-1BF F8477-8R SF.260, B, C, D A10EU O-540-E4A5, AEIO-540-D4A5 HC-C2YK-4F FC8477-8R F.260, F.260B A10EU O-540-E4A5 HC-C2YK-1B 8467-8R F.260C, D, E Unknown O-540-E4A5, (AE)IO-540-D4A5 HC-C2YK-1BF F8477-8R F.260C, D, E, F A10EU O-540-E4A5, (AE)IO-540-D4A5 HC-C2YK-1BF F8477-8R F.260C, D, E STC-SA302GL O-540-E4A5, (AE)IO-540-D4A5 HC-C2YK-4( )F FC8477-8R Skydancer Aviation SD-260 Experimental IO-540-C4B5 HC-C2YR-4CF FC8477A-4 Sorrell SNS-7 Experimental IO-360-B1E HC-C2YK-4CF FC7666A-2, -4Q Staudacher Aircraft STAUDACHER 300 Experimental IO-540-K HC-C2YR-4CF FC8477A-4 STAUDACHER S-1000 Experimental IO-540-D4A5 HC-C2YK-1BF F8477 AIRCRAFT MODEL FAA TC/STC NO. ENGINE PROPELLER BLADE Aircraft and Propeller Applications (continued) Table 2, page 2 of 3 NOTE: Affected propellers are installed on, but not limited to, the aircraft applications listed in Table 2. HARTZELL PROPELLER INC. SERVICE BULLETIN HC-SB-61-227 Propeller - Hub Inspection Jan 16/98 HC-SB-61-227 Revision 6, dated Aug 27/12 Page 20 of 20 Steen SKYBOLT Experimental IO-360-A1A HC-C2YR-4BF, -4CF FC7666A-2 SKYBOLT Unknown IO-540-C4B5 HC-C2YK-1BF F8477-4 SKYBOLT Unknown IO-360-A1B HC-C2YR-4BF, -4CF FC7666A-2 SKYBOLT Unknown IO-540-C4B5 HC-C2YK-4F FC8477-7 Stoddard Hamilton 2 SRG Experimental IO-360 HC-C2YR-4CF FC7666A-4 SUPER 2SRG Experimental IO-360 HC-C2YR-1BF F7068-2 Stolp STARDUSTER Unknown O-360-A1F6 HC-C2YK-4AF FC7666A-4 STARDUSTER Unknown O-540-( ) HC-C2YR-4CF FC8477A-8R STARDUSTER Unknown IO-540-D4A5 HC-C2YK-4AF FC8467-7R STARDUSTER Unknown IO-540-D4A5 HC-C2YK-1BF F8467-8 Transavia AIRTRUK Unknown IO-540-K1A5 HC-C2YR-1BF F8475+2 AIRTRUK Unknown 6-320 HC-C2YR-1F F9587A Universal T-25 MILITARY TRAINER Unknown IO-540-K1A5 HC-C2YK-4BF FC8475A-2 UTVA 75AG Unknown AEIO-540-L1B5D HC-C2YR-1BF F8475D-4 75 Unknown IO-360-B1F HC-C2YK-1BF F7666-2 LASTA Unknown AEIO-540-L1A5D HC-C2YR-4CF FC8475-6 Valmet L-70 VINKA Unknown IO-360-A1B6; AEIO-360-A1B6 HC-C2YR-4F FC7666A-2 Vans RV-6 Experimental IO-360 Series HC-C2YK-4CF FC7666A-2, -4 AIRCRAFT MODEL FAA TC/STC NO. ENGINE PROPELLER BLADE Aircraft and Propeller Applications (continued) Table 2, page 3 of 3 NOTE: Affected propellers are installed on, but not limited to, the aircraft applications listed in Table 2.

All Piper PA-36 Pawnee Brave weight and balance