# SDR 99ZZZX4090

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 21, 1999
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: N32800
- Make and model: Bell UH-1H
- Registry model: [Bell UH-1H](https://openairdocs.org/model/bell-uh-1h) (OpenAirDocs)
- Aircraft serial: 6616854
- System (JASC): [6520 · Tail Rotor Gearbox](https://openairdocs.org/jasc/6520)
- Part: Stud
- Part number: AN126420
- Condition: Failed
- Location: Tail Rotor
- Component: 204040012013
- 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/99ZZZX4090

## Discrepancy

MOUNTING STUDS, 6 EACH, FAILED SUB-SURFACE AT 90 DEGREE GEARBOX MOUNTING FLANGE (APPARENT TENSILE FAILURE).  SUBMITTER SUSPECTED PREVIOUS VIBRATORY OR OVER-TORQUE DAMAGE TO MOUNTING STUDS.

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