# SDR AU510001911

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 12, 2005
- Submitted: June 6, 2006
- Operation: General aviation
- Make and model: Cessna 421C
- Registry model: [Cessna 421C](https://openairdocs.org/model/cessna-421c) (OpenAirDocs)
- Engine: Cont GTSIO520N
- Propeller: Mcauly 3FF32C501
- System (JASC): [8520 · Reciprocating Engine Power Section](https://openairdocs.org/jasc/8520)
- Part: Gear
- Part number: 537432
- Condition: Damaged
- Location: Crankshaft
- Part time: 1,516 hours
- Stage of operation: DE
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AU510001911

## Discrepancy

(AUS) ENGINE CRANKSHAFT GEAR MISSING TEETH.  SUSPECT CAUSED BY A PIECE OF METAL FROM THE STARTER ADAPTER GEAR JAMMING IN THE GEAR TEETH. METAL CONTAMINATION OF ENGINE. (CASA NR 510001911)

---
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.