# SDR CA040716007

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 12, 2004
- Submitted: January 5, 2005
- Operation: General aviation
- Make and model: Doug C-54
- Registry model: [Doug C-54](https://openairdocs.org/model/douglas-c-54) (OpenAirDocs)
- Engine: Pwa R20007M2
- System (JASC): [8500 · Engine (Reciprocating)](https://openairdocs.org/jasc/8500)
- Part: Diaphragm
- Condition: Damaged
- Location: Accelerator Pump
- Component: Accelerator Pum, Pwa
- Component part number: 81648
- Stage of operation: CR
- How discovered: V
- Nature of condition: E
- Precautionary procedure: E
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA040716007

## Discrepancy

(CAN) DURING CRUISE THE NR 4 ENGINE STARTED TO BACKFIRE AND SHAKE.  THE ENGINE WAS SHUTDOWN AND THE PROPELLER FEATHERED.  THE FLIGHT RESUMED WITHOUT INCIDENT.

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