# SDR NACA20060054

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 30, 2006
- Submitted: December 4, 2006
- Operation: Air carrier
- Aircraft: N99330
- Make and model: Doug DC-6A
- Registry model: [Doug DC-6A](https://openairdocs.org/model/douglas-dc-6a) (OpenAirDocs)
- Aircraft serial: 43576
- Aircraft time: 32,257 hours
- Engine: Pwa R2800CB3
- Engine time: 1,692 hours
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder
- Part number: 356993
- Part serial: 800211
- Condition: Cracked
- Location: Nr 16
- Part time: 1,692 hours
- Stage of operation: DE
- 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/NACA20060054

## Discrepancy

NR 4 ENGINE SHUT DOWN DUE TO BACKFIRING.  REPLACED NR 16 CYLINDER DUE TO CRACKED HEAD, REF: NAC DC-6 MM TASK CARD V PG 16 AND 16A.  GROUND RUN CHECK GOOD, NO LEAKS NOTED.

---
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.