# SDR Y2GR201111333574

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 3, 2011
- Submitted: November 3, 2011
- Operation: General aviation
- Make and model: Cessna 310N
- Registry model: [Cessna 310N](https://openairdocs.org/model/cessna-310n) (OpenAirDocs)
- Engine: Cont IO470VO
- Engine time: 243 hours
- System (JASC): [8520 · Reciprocating Engine Power Section](https://openairdocs.org/jasc/8520)
- Part: Gear
- Part number: 653631
- Condition: Damaged
- Location: Crankshaft
- Part time: 243 hours
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/Y2GR201111333574

## Discrepancy

CRANKSHAFT GEAR WAS FOUND WITH FOUR TEETH MISSING FROM THE GEAR. THE CAMSHAFT GEAR THAT IT IS MESHED WITH STILL ROTATED AROUND THE GEAR AND MESHED WITH THE REMAINING TEETH. SB 08-12 DATED 9/9/08 SUPERSEDES THIS GEAR PN WITH A NEW HEAVIER GEAR PN 657175 AT THE NEXT ENGINE DISASSEMBLY. THIS ENGINE HAD BEEN DISASSEMBLED FOR A PROPELLER STRIKE INSPECTION.

---
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.