# SDR AU981612

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 5, 1998
- Submitted: March 26, 2000
- Operation: General aviation
- Make and model: Piper PA-30
- Registry model: [Piper PA-30](https://openairdocs.org/model/piper-pa-30) (OpenAirDocs)
- Engine: Lyc IO320B1A
- System (JASC): [7810 · Engine Collector/Tailpipe/Nozzle](https://openairdocs.org/jasc/7810)
- Part: Exhaust Stack
- Condition: Misinstalled
- Location: Rt Engine
- 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/AU981612

## Discrepancy

(AUS) PILOT REPORTED UNUSUAL NOISE COMING FROM THE RT ENGINE AND SUSPECTED A STICKY VALVE.  AFTER ENGINE RUNS, THE COWLS WERE REMOVED FROM THE RT ENGINE TO CARRY OUT A COMPRESSION CHECK.  IT WAS THEN NOTICED THAT THE NR 3 EXHAUST STACK WAS NOT FITTED TO THE NR 3 CYLINDER.  THE STACK WAS APPROX 3.81 CM (1.5 INCHES) BELOW ITS CORRECT POSITION.  SUSPECT THAT EITHER THE EXHAUST STACK WAS NOT FITTED OR WAS FITTED INCORRECTLY.

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