# SDR 97ZZZX4305

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 1, 1997
- Submitted: March 26, 2000
- Operation: General aviation
- Make and model: Piper PA-20-135
- Registry model: [Piper PA-20-135](https://openairdocs.org/model/piper-pa-20-135) (OpenAirDocs)
- Engine: Lyc O290D2
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Valve
- Condition: Sticking
- Location: Engine Exhaust
- Part time: 2,200 hours
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/97ZZZX4305

## Discrepancy

FOUND ENGINE EXHAUST VALVE STICKING.  AIRCRAFT HAD BEEN OPERATED ON AVIA GAS.  VALVE REQUIRED DISSASSEMBLY, CLEANING, AND LAPPING IN.  SMOH:  525 HOURS.

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