# SDR CNQR2012052286445

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 22, 2012
- Submitted: May 22, 2012
- Operation: General aviation
- Filed by: [Textron Aviation Inc, repair station CNQR918C](https://openairdocs.org/faa-repair-station/CNQR918C/textron-aviation-inc.md) (OpenAirDocs)
- Aircraft: [N1EL](https://openairdocs.org/aircraft/N1EL), registered now
- Make and model: Cessna 510
- Registry model: [Cessna 510](https://openairdocs.org/model/cessna-510) (OpenAirDocs)
- Aircraft serial: 5100061
- Aircraft time: 998 hours, 463 cycles
- Engine: Pwc PW615FA
- Engine time: 998 hours, 463 cycles
- System (JASC): [8300 · Accessory Gearboxes](https://openairdocs.org/jasc/8300)
- Part: Gearbox
- Condition: Cracked
- Location: Zone 400
- Part time: 998 hours, 463 cycles
- Stage of operation: CR
- How discovered: E
- Nature of condition: K
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CNQR2012052286445

## Discrepancy

A CRACK WAS DISCOVERED IN THE ENGINE ACCESSORY GEARBOX NEAR THE STARTER/GENERATOR MOUNTING FLANGE. DURING THE AIRCRAFT`S LAST FLIGHT IT EXPERIENCED A GENERATOR BEARING FAILURE.  DURING THE POST RUNS, AFTER PART REPLACEMENT AN OIL LEAK WAS DISCOVERED COMING FROM A HAIRLINE CRACK IN THE GEARBOX.  CRACK WAS VERIFIED VIA EDDY CURRENT INSPECTION.

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