# SDR 99ZZZX1446

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 22, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N36AP](https://openairdocs.org/aircraft/N36AP), registered now
- Make and model: Doug DC3C
- Registry model: [Doug DC3C](https://openairdocs.org/model/douglas-dc3c) (OpenAirDocs)
- Aircraft serial: 13439
- Engine: Pwa R183092
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Valve
- Condition: Inoperative
- Location: Lt Engine
- Part time: 6,183 hours
- Stage of operation: NR
- Nature of condition: R
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/99ZZZX1446

## Discrepancy

DAY/NB9 - EN ROUTE AT CRUISE POWER, LEFT ENGINE STARTED RUNNING ROUGH. DIVERTED TO TDZ. FOUND ALL REAR CYLINDER VALVES NOT MOVING.  SUSPECT REAR CAM RING FAILURE.

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