# SDR 96ZZZX2786

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 23, 1996
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: N107FC
- Make and model: Piper PA-31-310
- Registry model: [Piper PA-31-310](https://openairdocs.org/model/piper-pa-31-310) (OpenAirDocs)
- Aircraft serial: 31612
- Engine: Lyc TIO540A2B
- System (JASC): [7414 · Magneto/Distributor](https://openairdocs.org/jasc/7414)
- Part: Bearing
- Part number: 67542
- Condition: Misinstalled
- Location: Mag Drive
- Stage of operation: CR
- Nature of condition: Y, W
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/96ZZZX2786

## Discrepancy

WHILE IN LEVEL FLIGHT, THE RIGHT ENGINE QUIT WITHOUT WARNING.  UPON INVESTIGATION, DETERMINED THE DRIVE DOWEL PIN (STD-1065) HAD BEEN SHEARED, AND THE LEFT IDLER GEAR (71668) HAD LOST A TOOTH AND JAMMED THE MAGNETO DRIVE GEAR (GEAR RETAINER ASSY LW-19102 OR LW 19096). WHEN THE LEFT MAGNETO (S6LN-1208) WAS REMOVED, THE MAGNETO HAD A BURNED APPEARANCE.  UPON DISASSEMBLY, FOUND THE ROTOR HAD CONTACTED THE POLE SHOES IN THE HOUSING.  AFTER SENDING THE MAGNETO TO THE BENDIX FACTORY, DISCOVERED THE DRIVE GEAR HAD A SIDE LOAD PLACED ON IT CAUSING THIS TO OCCUR.

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