# SDR NACA20030069

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 23, 2003
- Submitted: January 24, 2003
- 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: 37,854 hours
- Engine: Pwa R2800CB3
- Engine time: 1,446 hours
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder
- Part number: 356993
- Part serial: L3757
- Condition: Cracked
- Location: 4
- Part time: 525 hours
- Component: Engine, Pwa, CB3
- Component part number: R2800
- 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/NACA20030069

## Discrepancy

DISCREPANCY: #4 ENGINE PRECAUTIONARY SHUT DOWN DUE TO BACK FIRING, ANALYZER READS #4 CYLINDER LOW COMPRESSION BOTH SIDES.CORRECTIVE ACTION: REPLACED #4 ENGINE #4 CYLINDER.

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