# SDR 99ZZZX1168

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 21, 1999
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N802JW](https://openairdocs.org/aircraft/N802JW), registered now
- Make and model: Lear 35A
- Registry model: [Lear 35A](https://openairdocs.org/model/gates-learjet-35a) (OpenAirDocs)
- Aircraft serial: 453
- Engine: Garrtt TFE7312
- System (JASC): [7260 · Turbine Engine Accessory Drive](https://openairdocs.org/jasc/7260)
- Part: Valve
- Part number: 30721192
- Condition: Inoperative
- Location: Gearbox
- Stage of operation: NR
- Nature of condition: B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/99ZZZX1168

## Discrepancy

PILOT REPORTED SMOKE IN CABIN.  AIRCRAFT RETURNED TO ITS STARTING POINT (ORF).  PROBLEM ISOLATED TO GEARBOX BREATHER VALVE STUCK CLOSED.  UNIT REPLACED AND OPERATIONAL CHECK GOOD.

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