# SDR NACA20050008

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 8, 2005
- Submitted: March 10, 2005
- Operation: Air carrier
- Aircraft: [N43872](https://openairdocs.org/aircraft/N43872), registered now
- Make and model: Doug DC-6
- Registry model: [Doug DC-6](https://openairdocs.org/model/douglas-dc-6) (OpenAirDocs)
- Aircraft serial: 533294
- Aircraft time: 36,620 hours
- Engine: Pwa R2800CB3
- Engine time: 1,174 hours
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder
- Part number: 356995
- Part serial: F7219
- Condition: Failed
- Location: Nr 10
- Part time: 1,174 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/NACA20050008

## Discrepancy

NR 1 ENGINE SHUT DOWN AFTER BACKFIRING IN CRUISE AND COULD NOT RE-LEAN.  REPLACED NR 10 CYLINDER DUE TO EXHAUST VALVE FAILURE.  OP AND LEAK CHECK GOOD.  COMPRESSION CHECK OF NR 15 CYLINDER GOOD, REPLACED WITH NEW SPARK PLUGS.

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