# SDR CA980916016

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 11, 1998
- 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 TIO540*
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Head
- Part number: ECLW13448CP
- Condition: Cracked
- Location: Nr 3 Cylinder
- Stage of operation: CL
- Nature of condition: E, K
- Precautionary procedure: A, E
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA980916016

## Discrepancy

(CAN) DURING CLIMB-OUT, THE NR 1 ENGINE BEGAN TO RUN ROUGH.   A SHORT TIME LATER, OIL STARTED TO APPEAR ON THE ENGINE COWLING.  THE CREW DID A PRECAUTIONARY SHUTDOWN AND RETURNED TO THE POINT OF DEPARTURE.  POST-FLIGHT INSPECTION FOUND THE NR 3 CYLINDER WITH A CRACKED HEAD, MOVEMENT OF THE HEAD ALLOWED THE PUSHROD SEALS TO UNSEAT RESULTING IN THE OIL LEAK. THE NR 3 CYLINDER WAS REPLACED AND GROUND RUN SERVICEABLE.

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