# SDR NACA20040011

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 12, 2004
- Submitted: February 13, 2004
- Operation: Air carrier
- Aircraft: [N2907F](https://openairdocs.org/aircraft/N2907F), registered now
- Make and model: Doug DC-6
- Registry model: [Doug DC-6](https://openairdocs.org/model/douglas-dc-6) (OpenAirDocs)
- Aircraft serial: 533265
- Aircraft time: 35,515 hours
- Engine: Pwa R2800CB3
- Engine time: 1,546 hours
- System (JASC): [7160 · Engine Air Intake System](https://openairdocs.org/jasc/7160)
- Part: Intake Pipe
- Part number: 247779
- Condition: Ruptured
- Location: Nr 4 Engine
- Part time: 1,546 hours
- Stage of operation: AP
- 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/NACA20040011

## Discrepancy

NR 4 ENGINE BACKFIRING ON FINAL AND UPON LANDING.  ENGINE SHUT DOWN AFTER LANDING.  REPLACED NR 4 ENGINE, NR 15 & 16 Y-PIPE DUE TO BEING RUPTURED.  CHECKED GOOD ON RUN.

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