# SDR 2005FA0001335

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 21, 2005
- Submitted: September 27, 2005
- Operation: General aviation
- Aircraft: N100E
- Make and model: Beech B50
- Registry model: [Beech B50](https://openairdocs.org/model/beech-b50) (OpenAirDocs)
- Aircraft serial: CH14
- Aircraft time: 10,752 hours, 6,497 cycles
- Engine: Garrtt TFE73131C
- System (JASC): [2435 · Starter-Generator](https://openairdocs.org/jasc/2435)
- Part: Starter Gen
- Part number: 80603201
- Part serial: 625
- Condition: Failed
- Location: Nr 1 Engine
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2005FA0001335

## Discrepancy

UNIT SUSTAINED A MAIN BEARING ARMATURE DRIVE SHAFT FAILURE DURING FLIGHT. THE NR1 MAIN GENERATOR WARNING LIGHT ENUNCIATOR ILLUMINATED THE ARMATURE, DRIVE BALL DRIVESHAFT, AND BEARING FLANGE ARE NON-SERVICEABLE.  THE ORIGINAL OVERHAUL PERIOD (TBO), FOR THIS UNIT IS 900 FLIGHT HOURS.  THE AIR OPERATOR HAS NOW ELECTED TO REDUCE THE TBO OF THE UNIT TO 600 HRS.

---
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.