# SDR NACA20070002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 12, 2007
- Submitted: January 15, 2007
- Operation: Air carrier
- Aircraft: N6174C
- Make and model: Doug DC-6A
- Registry model: [Doug DC-6A](https://openairdocs.org/model/douglas-dc-6a) (OpenAirDocs)
- Aircraft serial: 44075
- Aircraft time: 52,738 hours
- Engine: Pwa R2800CB3
- Engine time: 1,994 hours
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder
- Part number: 356993
- Part serial: FK1498
- Condition: Cracked
- Location: Nr 4
- Part time: 499 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/NACA20070002

## Discrepancy

NR 2 ENGINE SHUT DOWN DUE TO LOW COMPRESSION INDICATION ON NR 4 CYLINDER.  REPLACED NR 4 CYLINDER DUE TO A CRACKED HEAD PER NAC DC-6MM SECT V PG 16 AND 16A.  OP AND LEAK CHECKED GOOD.

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