# SDR CA050307010

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 24, 2005
- Submitted: April 1, 2005
- Operation: General aviation
- Make and model: Bell 412
- Registry model: [Bell 412](https://openairdocs.org/model/bell-412) (OpenAirDocs)
- System (JASC): [6220 · Main Rotor Head](https://openairdocs.org/jasc/6220)
- Part: Nut
- Part number: NAS10222A8
- Condition: Incorrect
- Location: Rotor Hub
- Stage of operation: IN
- How discovered: V
- Nature of condition: W
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA050307010

## Discrepancy

(CAN) CAD PLATED NUT NAS1022AX8 INSTALLED INSTEAD OF DRY FILM LUBED NAS10222A8. THE NAS1022AX8 NUT FAILED DURING TORQUE UP, PART CRACKED.

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