VENDOR SERVICE PUBLICATION NO. 62
Piper PA-12 Super Cruiser · Service Bulletins
Overview
This document is a Vendor Service Publication No. 62, issued on April 7, 1986, addressing the AVCO Lycoming Service Bulletin No. 464A. It is directed towards all owners and operators of Piper aircraft, including distributors and service facilities. The bulletin highlights a potential failure of impulse couplings in various Piper models, including the PA-12 Super Cruiser, which could lead to a total loss of engine power. The document outlines compliance requirements for inspection and identification of affected magnetos and provides detailed instructions for ensuring safety and compliance with the service bulletin.
- The service bulletin applies to the Piper PA-12 Super Cruiser and other models listed.
- Impulse coupling failures can lead to total engine power loss.
- Magnetos with less than 300 operating hours must be inspected before the next engine start.
- All affected impulse coupling assemblies must be inspected and identified as compliant with the service bulletin.
- Improperly heat-treated flyweights must be replaced immediately to ensure safety.
Document
Source
Originally published by bsd-box.net. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.
Document details
- Type
- Service Bulletins
- Year
- 1986
- Pages
- 5
- File size
- 319 KB
- Publisher
- bsd-box.net
Common. Rarer than 3% of the aircraft models we track.
Most owners only have the POH. Here's the essential set for the Piper PA-12 Super Cruiser.
- Pilot's Operating Handbook / AFM
- Checklist
- Maintenance Manual
- Parts Catalog (IPC)
- Systems & Wiring
- Service Bulletins
- Type Certificate (TCDS)
Piper PA-12 Super Cruiser for sale now
Free — save the PA-12 Super Cruiser to your watchlist and track it in one place.
More Piper PA-12 Super Cruisermanuals & documents
- Ethics of misdiagnosisOther Documents
- PS-POH-1-1-01Checklist
- Avidyne 700-00182-XXX and 700-00179-XXX Approved Model List for STC SA00343BOFlight Manual
- Avidyne Traffic Advisory System Approved Model ListSystems Description
- A Handsome 1947 Piper Super CruiserOther Documents
- PIPER PA-12/14/15/16/17 with Lycoming O235 EngineSystems Description
- Aviation Occurrence Report: Stall During Initial ClimbOther Documents
- Correct Procedures for Rigging a SuperCubMaintenance Manual
- Tech Sheet: Piper PA-12: Super Cruiser, J5 CubSpecifications
If you fly the Piper PA-12 Super Cruiser, you may also be researching these.
In this document
Purpose
The purpose of this service bulletin is to distribute AVCO Lycoming Service Bulletin No. 464A to all relevant parties, including owners, operators, and service facilities. It addresses a critical safety issue regarding impulse coupling failures that could result in engine power loss.
Compliance Time
Compliance with the service bulletin is required as specified in the attached Bendix Service Bulletin No. 623A. All magnetos with impulse couplings must be inspected and identified prior to the next engine start if they have less than 300 operating hours.
Inspection Procedures
The bulletin provides detailed inspection procedures for impulse coupling cam assemblies. It emphasizes the need to check for improperly heat-treated flyweights, which could lead to failure. Specific steps are outlined for inspecting and replacing defective components.
Maintenance Parts Affected
The service bulletin lists all impulse coupling cam assemblies and magnetos incorporating impulse couplings as affected parts. It specifies that all spare parts must also be inspected before being put into service.
General Information
The document warns of the potential for failure due to improperly heat-treated flyweights in impulse couplings. It stresses the importance of following inspection procedures to prevent failures that could lead to engine power loss.
Safety notes
- Failure of an impulse coupling can result in total loss of engine power.
- Improperly heat-treated flyweights can lead to impulse coupling failure.
Full document text
VSP-62 . April 7, 1986 VENDOR SERVICE PUBLICATION TO: All Owners/Operators, Piper Distributors, Factory Direct Dealers and Piper Field Service Facilities SUBJECT: AVCO Lycoming Service Bulletin No. 464A MODELS AFFECTED: SERIAL NUMBERSAFFECTED: PA-12 Super Cruiser 12-02 through 12-4036 PA-14 Family Cruiser 14-01 through 14-523 PA-16 Clipper 16-01 through 16-736 PA-18 Super Cub 18-01 through 18-8309025 PA-20 Pacer 20-01 through 20-1121 PA-22 Tripacer/Colt 22-01 through 22-9848 PA-23-150/160 Apache 23-01 through 23-2046 PA-23-235 Apache 27-505 through 27-622 PA-23-250 Aztec 27-01 through 27-2504 PA-24-180/250 Comanche 24-01 through 24-2387 PA-25-150/235/260 Pawnee 25-01 through 25-8156024 PA-28-150/160/180 Cherokee 28-01 through 28-7505261 PA-28-140 Cherokee 28-20001 through 28-7725290 PA-28-161 Warrior II 28-7716001 through 28-8516099 PA-28-181 Archer II 28-7690001 through 28-8590045 PA-28R-180 Arrow 28R-30001 through 28R-7130019 PA-28R-200 Arrow II 28R-35001 through 28R-7635545 PA-28R-201 Arrow I I I 28R-7737001 through 28R-7837335 PA-28RT-201 Arrow IV 28R-7918001 through 28R-8218039 PA-28-235 Cherokee 28-10001 through 28-7710089 PA-30 Twin Comanche 30-01 through 30-2000 PA-32-300 Cherokee Six 32-40001 through 32-7940290 PA-32-301 Saratoga 32-8006001 through 32-8506021 PA-34-200 Seneca 34-7250001 through 34-7450220 PA-36-300 Brave 36-7760001 through 36-8160023 PA-38-112 Tomahawk 38-78AOOOl through 38-82A0122 PA-39 Twin Comanche 39-01 through 39-155 PA-44-180 Seminole 44-7995001 through 44-8195040 PA-44-180T Turbo Seminole 44-8107001 through 44-8207031 COMPLIANCETIME: As specified in attached Bendix Service Bulletin No. 623A. PIPER AIRCRAFT CORPORATION 2926 PIPER DRIVE, VERO BEACH, FL 32960 l (305) 567-4361 VENDOR SERVICE PUBLICATION NO. 62 PAGE 2 OF 2 PURPOSE: To distribute AVCO Lycoming Service Bulletin No. 464A to all Owners/Operators, Piper Distributors, Factory Direct Dealers and Piper Field Service Facilities, The attached AVCO Lycoming Service Bulletin addresses a potential for impulse coupling failure. Failure of an impulse coupling can result in total loss of engine power. Affected AVCO Lycoming equipment may be installed in the above listed Piper airplanes. WILLIAMSPORT, PENNSYLVANIA 17701 DATE: October 18, 1985 Service Bulletin No. 464A (Supersedes Service Bulletin No. 464) Engineering Aspects are FAA Approved SUBJECT: Bendix Service Bulletin Revision No. 623A. Supplement No. 1 to Service Bulletin No. 464 is a revision of Bendix Service Bulletin No. 623. Bendix Engine Products Division Jacksonville. Fl. 32245-7880 SERVICE BULLETIN JP-00278 Engineering Aspects are FAA Approved Bulletin No. 623A Date 9/1982 Revised 8/1984 L SUBJECT: Inspection of impulse coupling cam assemblies. REASON FOR BULLETIN: 1. To alert all users of possible impulse coupling failure. 2. To provide an inspection procedure to preclude failure of the impulse coupl- ing. EQUIPMENT AFFECTED: All Bendix magnetos with type designations as follows: S4LN-21/1225/1227 S4RN-21/1225/1227 S4LN-200 P/N 10-163005-7 S6LN-21/23/25/1225/1227 S6RN-21/23/25/1225/1227 D-2021/2031 D-3000 all (Refer to Bendix Publication L-1147 Aircraft Impulse Coupling Cross Reference Data as required.) Except Bendix Blue Label magnetos above S/N 8236001 Except Bendix Red Label magnetos above serial numbers as indicated below: s-20: B-001171 or A297043 s-200: B-001732 or A297043 s-1200: B-001162 or A297043 D-2000: 35550 D-3000: B-000249 or 5806 Page 1 of 3 Member of GAMA General Aviation Manufacturers Association Service Bulletin No. 464A MAINTENANCE (SPARE) PARTS AFFECTED: 1. All impulse coupling cam assemblies. 2. All impulse coupling assemblies. 3. All spare magnetos incorporating an impulse coupling. COMPLIANCE: 1. All magnetos having impulse couplings with less than 300 operating hours must be inspected and identified as having complied with this Service Bulletin prior to the next engine start. 2. All spare parts must be inspected and identified before being put into service. GENERAL INFORMATION: Some improperly heat treated (soft) flyweights have been reported on impulse couplings currently in service. If this condition exists and is not detected, impulse coupling failure could occur. The flyweights must be inspected in accordance with the instructions in this Service Bulletin and if defective (soft) the impulse coupling or cam assembly must be replaced immediately. DETAILED INSTRUCTIONS: (Refer to appropriate Bendix Magneto Overhaul Instruc- tions for the magneto series being inspected.) NOTE The magneto should be removed from the engine only to the extent necessary to perform the in- spection described herein. Depending on the engine application, it may not be necessary to remove the harness from the magneto for the inspection procedure. NOTE All magnetos with the impulse coupling recessed into the magneto flange must have the impulse coupling removed from the magneto to perform the inspection. This is a bench operation and will require the magneto to be completely removed from the engine and the harness removed from the magneto. CAUTION Whenever an impulse coupling is removed from a magneto, it must be removed following publish- ed procedures, paying strict attention to notes and cautions. Upon reassembly, the castellated nut securing the impulse coupling to the drive shaft must be torqued to 15 ft. lbs. and cotter pinned with new pin. If unable to install pin, torque nut to next castle, not to exceed 25 ft. lbs. and install pin. Removed pin must be discard- ed and replaced with a new cotter pin (P/N 10-90751-18). 1. Following published procedures remove the magneto from the engine. 2. Place the magneto in a suitable work stand with the impulse coupling facing up. Page 2 of 3 3. Use finger pressure to push inward on the toe (see figure 1) of each flyweight so that the flyweight heel protrudes outward. 4. Using a fine #l, double cut, l/2 inch wide file, at least
Show full textShow less
3/32 inch thick, pass the file across the heel of the flyweight attempting to remove material. (See figure 1.) If the flyweight has been properly heat treated the file will “glide” smoothly over the heel of the flyweight, removing no material. If the flyweight is not properly heat treated (soft), the file will not “glide” easily across the surface of the flyweight heel, and material will be removed. IN THIS AREA TOE HEEL Figure 1. Note: XXX indicates heat treated flyweight by lot number 5. If an improperly heat treated (soft) flyweight is found, immediately remove and replace the cam assembly and/or the impulse coupling assembly following pro- .- cedures in the magneto overhaul instructions, an pay- inn strict attention to notes and cautions. 6. Inspect the impulse coupling stop pins for wear and replace as necessary. 7. After flyweights and stop pins have been inspected and the impulse coupling reinstalled on the magneto (if removed), identify the magneto by stamping a 1/16 inch letter “F” in the upper right corner of the identification plate to indicate this Service Bulletin has been complied with. 8. Reinstall the magneto on the engine following publish- ed procedures. 9. Make an appropriate engine log book entry, recording magneto serial number, to indicate that this Service Bulletin has been complied with. 10. Inspect all spare parts assemblies, including magnetos, following the same procedures described in steps 3 and 4 of the Detailed Instructions of this Ser- vice Bulletin. If both flyweights are found acceptable, identify the cam assembly by applying yellow Dykem or yellow lacquer to the heel of each flyweight. On magneto spares, stamp a 1/16 inch letter “F” in the upper right corner of the identification plate to in- dicate this Service Bulletin has been complied with. Service Bulletin No. 464A 11. Any cam assembly with an improperly heat treated (soft) flyweight should be returned to the manufac- turer through a currently Authorized Bendix Engine Products Division Distributor. WARRANTY CONSIDERATION: None applicable 12. A new method of marking is being implemented to permanently identify heat treated cam assembly flyweights. See figure “1” for location. Pending con- sumption of current inventory, there will be a mixture of assemblies identified by the following methods. 1. Original method ----- Yellow paint (Dykem or Lac- quer) on the heel of each flyweight. SPECIAL TOOLS REQUIRED: Refer to applicable manuals. MAN HOURS REQUIRED: 1.0 hour per engine with shallow flange mag. 1.25 hours per engine with deep flange mag. 2. New method ----- Stamped numbers as indicated in WEIGHT CHANGE: figure “1” on each flyweight. None Page 3 of 3
56 Piper PA-12 Super Cruiser parts for sale
See all →
Parts listed for sale by vetted eBay sellers — confirmed on eBay at checkout.