# SDR NACA20060052

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 25, 2006
- Submitted: November 28, 2006
- Operation: Air carrier
- Aircraft: [N2907F](https://openairdocs.org/aircraft/N2907F), registered now
- Make and model: Doug DC-6
- Registry model: [Doug DC-6](https://openairdocs.org/model/douglas-dc-6) (OpenAirDocs)
- Aircraft serial: 533265
- Aircraft time: 37,747 hours
- Engine: Pwa R2800CB3
- Engine time: 2,038 hours
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder
- Part number: 356996
- Part serial: SAB9323
- Condition: Failed
- Location: Nr 11
- Part time: 2,038 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/NACA20060052

## Discrepancy

NR 1 ENGINE BACK FIRE ON DESCENT FLIGHT, SUSPECT NR 11 REAR.  ENGINE SHUTDOWN.  REPLACED NR 11 CYLINDER DUE TO RING LAND FAILURE.

---
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.