# SDR NACA20030093

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 16, 2003
- Submitted: July 21, 2003
- Operation: Air carrier
- Aircraft: [N2907F](https://openairdocs.org/aircraft/N2907F), registered now
- Make and model: Doug DC-6A
- Registry model: [Doug DC-6A](https://openairdocs.org/model/douglas-dc-6a) (OpenAirDocs)
- Aircraft serial: 44636
- Aircraft time: 34,829 hours
- Engine: Pwa R2800CB3
- Engine time: 859 hours
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder
- Part number: 356993
- Part serial: 992417
- Condition: Failed
- Location: Nr 4 Engine
- Part time: 861 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/NACA20030093

## Discrepancy

NR 4 ENGINE WOULD NOT TAKE A LEAN.  DOUBLE SHORTED SECONDARY.  REPLACED NR 4 ENGINE NR 16 CYLINDER.

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