# SDR NAFA20030002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 9, 2003
- Submitted: October 10, 2003
- Operation: Air carrier
- Aircraft: [N7780B](https://openairdocs.org/aircraft/N7780B), registered now
- Make and model: Doug DC-6A
- Registry model: [Doug DC-6A](https://openairdocs.org/model/douglas-dc-6a) (OpenAirDocs)
- Aircraft serial: 45372
- Aircraft time: 22,120 hours
- Engine: Pwa R2800CB3
- Engine time: 2,077 hours
- System (JASC): [7421 · Spark Plug/Igniter](https://openairdocs.org/jasc/7421)
- Part: Spark Plug
- Part number: URHB32E
- Condition: Cracked
- Location: Nr 16 Cylinder
- Part time: 181 hours
- Stage of operation: CL
- 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/NAFA20030002

## Discrepancy

NR 1 PRECAUTIONARY ENGINE SHUT DOWN DUE TO NR 16 CYLINDER DOUBLE SHORTED SECONDARY.  REMOVED AND REPLACED NR 16 CYLINDER FRONT AND REAR SPARK PLUGS.  CHECKED GOOD.

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