# SDR NACA20050028

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 8, 2005
- Submitted: November 9, 2005
- 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: 51,967 hours
- Engine: Pwa R2800CB3
- Engine time: 1,611 hours
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder
- Part number: 404481
- Part serial: FQ994
- Condition: Cracked
- Location: Nr 8
- Part time: 1,611 hours
- Stage of operation: CL
- How discovered: O
- Nature of condition: R, J
- Precautionary procedure: E
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/NACA20050028

## Discrepancy

NR 1 ENGINE PRECAUTIONARY SHUTDOWN DUE TO BACKFIRING AND RUNNING ROUGH.  REPLACED NR 8 CYLINDER DUE TO CRACKED HEAD IAW DC-6MM SECT V, PG 16 & 16A.  OP CHECKED GOOD.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.