# SDR CA030110006

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 12, 2002
- Submitted: January 21, 2003
- Operation: Air carrier
- Make and model: Lear 25B
- Registry model: [Lear 25B](https://openairdocs.org/model/gates-lear-jet-25b) (OpenAirDocs)
- Aircraft time: 10,982 hours
- Engine: Ge CJ6106
- System (JASC): [2435 · Starter-Generator](https://openairdocs.org/jasc/2435)
- Part: Starter Gen
- Part number: 3083949AT
- Condition: Failed
- Location: Lt Engine
- Stage of operation: CR
- How discovered: O
- Nature of condition: X, M, J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA030110006

## Discrepancy

(CAN)  DEPARTED AIRPORT AND LEVELED OFF AT FL410. VERY LIGHT TURBULENCE WAS ENCOUNTERED. APPROXIMATELY TWO MINUTES INTO CRUISE, THE RT ENGINE PRODUCED A LIGHT BANG & BEGAN TO SPOOL DOWN. THE RPM'S SETTLED A  T 25-30 PERCENT. THE R/H THROTTLE WAS REDUCED TO IDLE THEN TO IDLE CUT-OFF. DURING THE DESCENT, AT FL380 THE LT ENGINE BEGUN TO VIBRATE, FOLLOWED BY AN ILLUMINATION OF THE LT GENERATOR WARNING LIGHT. AT THIS TIME AN EMERGENCY WAS DECLARED & A DESCENDING TURN WAS INITIATED.

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