# SDR CA131210001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 6, 2013
- Submitted: September 14, 2015
- Operation: General aviation
- Make and model: Lear 35A
- Registry model: [Lear 35A](https://openairdocs.org/model/gates-learjet-35a) (OpenAirDocs)
- Aircraft time: 11,848 hours
- Engine: Garrtt TFE73122B
- System (JASC): [8300 · Accessory Gearboxes](https://openairdocs.org/jasc/8300)
- Part: Case
- Part number: 30713213
- Condition: Cracked
- Location: Gearbox
- Part time: 12,382 hours
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA131210001

## Discrepancy

(CAN) DURING VISUAL INSPECTION OF THE ENGINE GEARBOX IT WAS NOTED THAT THE OIL FILTER HOUSING ASSY LOWER MOUNTING STUD EAR WAS CRACKED.  REPLACED THE AFT GEARBOX HOUSING CASE.

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