# SDR AU990041

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 21, 1999
- 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
- Propeller: Hartzl HCE3YR2
- System (JASC): [7810 · Engine Collector/Tailpipe/Nozzle](https://openairdocs.org/jasc/7810)
- Part: Exhaust Pipe
- Part number: LW16696
- Condition: Faulty
- Location: Engine
- Stage of operation: DE
- Nature of condition: E, R
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AU990041

## Discrepancy

(AUS) DURING DESCENT, THE RT ENGINE MAP DROPPED.  INVESTIGATION REVEALED EXHAUST SLIP JOINTS HAD EXPANDED OPEN ENOUGH FOR A GAP TO APPEAR BETWEEN THE PIPE ENDS.  FURTHER INVESTIGATION FOUND THAT THE FEMALE SECTION OF PIPE EXPANDED TO A LARGE DIAMETER THAN MALE PIPE, BUT WHEN COLD, THE EXHAUST PIPE FITTED CORRECTLY.

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