# SDR CA990115015

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 4, 1999
- Submitted: March 26, 2000
- Operation: General aviation
- Make and model: Piper PA-31
- Registry model: [Piper PA-31](https://openairdocs.org/model/piper-pa-31) (OpenAirDocs)
- Engine: Lyc TIO540A2B
- System (JASC): [8520 · Reciprocating Engine Power Section](https://openairdocs.org/jasc/8520)
- Part: Seal
- Part number: SL15628
- Condition: Leaking
- Location: Crankshaft
- Stage of operation: CR
- Nature of condition: K
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA990115015

## Discrepancy

(CAN) OIL LEAK REPORTED BY PILOT.  INSPECTION FOUND THE FRONT CRANKSHAFT SEAL LEAKING.  IT HAD SLIPPED OUT APPROXIMATELY .0625 INCH AND WAS LOOSE.  THE POSSIBLE CAUSE WAS A COLD START AND THE ENGINE RPM TOO HIGH DURING ENGINE WARM UP CAUSING HIGH OIL PRESSURE.  NEW SEAL INSTALLED.

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