# SDR 98ZZZX1538

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 31, 1998
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: N94TX
- Make and model: Gulstm 560
- Aircraft serial: 5600247
- System (JASC): [2435 · Starter-Generator](https://openairdocs.org/jasc/2435)
- Part: Bearing
- Condition: Failed
- Location: Lt Start/Gen
- Component: Lucas, 23085004
- Stage of operation: CL
- Nature of condition: E
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/98ZZZX1538

## Discrepancy

PILOTS REPORTED A VIBRATION IN THE LEFT ENGINE AFTER TAKEOFF.  THEY RETURNED TO THE AIRPORT WITH NO FURTHER PROBLEM.  INSPECTION REVEALED THE LT STARTER/GENERATOR ANTI-DRIVE END BEARING WAS BEGINNING TO FAIL.  THE GENERATOR WAS STILL OPERATING; HOWEVER, PIECES OF THE BEARING CAGE WERE FOUND UPON REMOVAL INDICATING IMMINENT CATASTROPHIC FAILURE.

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