# SDR NAFA20020001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 11, 2002
- Submitted: March 12, 2002
- 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: 21,684 hours
- Engine: Pwa R2800*
- Engine time: 1,361 hours
- System (JASC): [7421 · Spark Plug/Igniter](https://openairdocs.org/jasc/7421)
- Part: Spark Plug
- Part number: RHB32E
- Condition: Shorted
- Location: Nr 2 Engine
- Part time: 359 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/NAFA20020001

## Discrepancy

PRECAUTIONARY SHUT DOWN NR 2 ENGINE, DUE TO BACKFIRING.  NR 16 CYLINDER LEFT A LONG RESISTANCE PATTERN, RIGHT SHORTED SECONDARY.  INSPECTED THE NR 16 CYLINDER, REPLACED LEFT AND RIGHT SPARK PLUGS AND SHORT LEADS.

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