# SDR NACA200000020

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 13, 2000
- Submitted: August 23, 2000
- Operation: Air carrier
- Aircraft: N1036F
- Make and model: Doug DC-6A
- Registry model: [Doug DC-6A](https://openairdocs.org/model/douglas-dc-6a) (OpenAirDocs)
- Aircraft serial: 43581
- Aircraft time: 40,903 hours
- Engine: Pwa R2800CB3
- Engine time: 2,077 hours
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder
- Part number: 356993
- Part serial: FK1947
- Condition: Cracked
- Location: Nr 2 Engine
- Part time: 2,077 hours
- Stage of operation: CR
- How discovered: O
- Nature of condition: R
- Precautionary procedure: E, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/NACA200000020

## Discrepancy

NR 2 ENGINE BACKFIRES IN CRUISE AND PRECAUTIONARY SHUTDOWN AT 0222Z, SUSPECT NR 4 CYLINDER.  REPLACED NR 4 CYLINDER DUE TO CRACKED HEAD.

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