# SDR AU981668

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 23, 1998
- Submitted: March 26, 2000
- Operation: General aviation
- Make and model: Piper PA-31-350
- Registry model: [Piper PA-31-350](https://openairdocs.org/model/piper-pa-31-350) (OpenAirDocs)
- Engine: Lyc TIO540J2BD
- System (JASC): [8520 · Reciprocating Engine Power Section](https://openairdocs.org/jasc/8520)
- Part: Bearing
- Condition: Failed
- Location: Lt Engine
- Stage of operation: CL
- Nature of condition: B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AU981668

## Discrepancy

(AUS) DURING CLIMB, THE LT ENGINE MANIFOLD PRESSURE DECREASED FROM 39 INCHES TO 30 INCHES WITH A VISIBLE OIL AND SMOKE TRAIL.  GROUND INVESTIGATION FOUND METAL CONTAMINATION IN THE LT ENGINE OIL FILTER AND FURTHER INVESTIGATION FOUND THAT THE NR 6 MAIN BEARING HAD FAILED.

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