# SDR 98ZZZX1078

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 5, 1998
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: N100QD
- Make and model: Beech 58
- Registry model: [Beech 58](https://openairdocs.org/model/beech-58) (OpenAirDocs)
- Aircraft serial: TH619
- System (JASC): [2410 · Alternator-Generator Drive](https://openairdocs.org/jasc/2410)
- Part: Drive Coupling
- Part number: 640922A
- Condition: Failed
- Location: Alternator
- Part time: 5,000 hours
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/98ZZZX1078

## Discrepancy

SUBMITTER STATED ALTERNATOR DRIVE HAS NO TBO AND ON FAILURE OF THIS UNIT THE INTERNAL GEAR AND ENGINE OIL SUPPLY ARE FOULED WITH METAL AND DEBRIS WHICH COULD CAUSE A CATASTROPHIC ENGINE FAILURE.  PART SHOULD HAVE LIFE-LIMIT.  MEL SHOULD NOT ALLOW OPERATION WITHOUT INSPECTION.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.