# SDR AU960423

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 11, 1996
- 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): [7922 · Engine Oil Temperature Regulator](https://openairdocs.org/jasc/7922)
- Part: Circlip
- Condition: Failed
- Location: Ac,Eng Oil Dist
- Component: Lyc, VERNATHERM
- Stage of operation: CL
- Nature of condition: E
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AU960423

## Discrepancy

(AUS) LH ENGINE OIL COOLER BYPASS VALVE (VERNATHERM) BODY CIRCLIP  BROKEN - ONE PIECE OF BROKEN CIRCLIP LODGED IN OIL PRESSURE RELIEF VALVE - SUSPECT CIRCLIP INCORRECTLY HEAT TREATED - RH ENGINE VERNATHERM SIMILARLY AFFECTED

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