# SDR NACA20020040

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 31, 2002
- Submitted: September 3, 2002
- Operation: Air carrier
- Aircraft: N779TA
- Make and model: Doug DC-6
- Registry model: [Doug DC-6](https://openairdocs.org/model/douglas-dc-6) (OpenAirDocs)
- Aircraft serial: 45529
- Aircraft time: 37,398 hours
- Engine: Pwa R2800*
- Engine time: 990 hours
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder
- Part number: 356994
- Part serial: RL1012
- Condition: Cracked
- Location: Nr 4 Engine
- Part time: 235 hours
- Stage of operation: CR
- How discovered: O
- Nature of condition: R
- Precautionary procedure: E, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/NACA20020040

## Discrepancy

FEATHERED THE NR 4 ENGINE IN CRUISE DUE TO BACKFIRED, LOW BMEP.  REPLACED THE NR 3 CYLINDER.

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