# SDR NACA20030094

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 17, 2003
- Submitted: July 21, 2003
- Operation: Air carrier
- Aircraft: N1377K
- Make and model: Doug DC-6A
- Registry model: [Doug DC-6A](https://openairdocs.org/model/douglas-dc-6a) (OpenAirDocs)
- Aircraft serial: 44596
- Aircraft time: 35,643 hours
- Engine: Pwa R2800CB3
- Engine time: 507 hours
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder
- Part number: 356994
- Part serial: A738WYAY
- Condition: Failed
- Location: Nr 2 Engine
- Part time: 509 hours
- Stage of operation: CR
- How discovered: O
- Nature of condition: R
- Precautionary procedure: E
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/NACA20030094

## Discrepancy

NR 2 ENGINE BACKFIRING & RUNNING ROUGH.  REPLACED NR 13 CYLINDER DUE TO EXHAUST VALVE SPRING FAILURE.

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