# SDR CA150519023

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 19, 2015
- Submitted: August 5, 2015
- Operation: General aviation
- Make and model: Bell 206B
- Registry model: [Bell 206B](https://openairdocs.org/model/bell-206b) (OpenAirDocs)
- Aircraft time: 15,905 hours
- System (JASC): [6520 · Tail Rotor Gearbox](https://openairdocs.org/jasc/6520)
- Part: Gear
- Part number: 206040406101
- Condition: Damaged
- Location: Tail Rotor
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA150519023

## Discrepancy

(CAN) UPON INSPECTION OF THE GEAR DURING O/H OF THE GEARBOX, IT WAS FOUND THAT 1 OF THE ATTACHMENT BOLT HOLES HAD NO CHAMFER WHERE THE BOLT HEAD MEETS THE GEAR FACE. THIS RESULTED IN DAMAGE TO THE SHANK AREA UNDERNEATH THE BOLT HEAD.

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