# SDR 96ZZZM1129

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 8, 1995
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N4213X](https://openairdocs.org/aircraft/N4213X), registered now
- Make and model: Doug DC-6A
- Registry model: [Doug DC-6A](https://openairdocs.org/model/douglas-dc-6a) (OpenAirDocs)
- Aircraft serial: 44605
- Engine: Pwa CB3
- System (JASC): [8520 · Reciprocating Engine Power Section](https://openairdocs.org/jasc/8520)
- Part: Intake Valve
- Part number: 83477
- Condition: Stuck Open
- Location: Nr 3 Engine
- Stage of operation: TO
- Nature of condition: E
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/96ZZZM1129

## Discrepancy

FLT NR 9013 - RETURNED TO ANC DUE TO BACKFIRING ON TAKEOFF.  MAINTENANCE REPLACED NR 3 CYLINDER ASSEMBLY ON NR 3 ENGINE DUE TO DAMAGED INTAKE VALVE AND PISTON.  AIRCRAFT RETURNED TO SERVICE.  (M)

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