# SDR 99ZZZX2189

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 2, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N9923S
- Make and model: Doug DC3C
- Registry model: [Doug DC3C](https://openairdocs.org/model/douglas-dc3c) (OpenAirDocs)
- Aircraft serial: 25964
- Engine: Pwa R183090D
- System (JASC): [8500 · Engine (Reciprocating)](https://openairdocs.org/jasc/8500)
- Part: Engine
- Condition: Failed
- Location: Left
- Part time: 7,575 hours
- Stage of operation: CR
- Nature of condition: R, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/99ZZZX2189

## Discrepancy

AIRCRAFT EN ROUTE FROM MBS/TPA.  LEFT ENGINE STARTED TO LOSE POWER AND WOULD NOT MAINTAIN MANIFOLD PRESSURE.  AIRCRAFT DIVERTED TO MWO.  FOUND REAR CYLINDERS VALVES NOT MOVING .  SUBMITTER SUSPECTED REAR CAM RING FAILURE.

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