# SDR CA100427004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 26, 2010
- Submitted: January 4, 2011
- Operation: Air carrier
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft time: 828 hours
- Engine: Allsn 250C47B
- System (JASC): [6220 · Main Rotor Head](https://openairdocs.org/jasc/6220)
- Part: Hub
- Part number: 406010117115
- Condition: Damaged
- Location: Main Rotor Head
- Part time: 1,135 hours
- Component: Main Rotor Head, 407010100123
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA100427004

## Discrepancy

(CAN) THREAD DAMAGED FOUND DURING ATTEMP TO REPLACE A DROOP STOP STUD.  STUD IN QUESTION HAD ORIGINAL LOCKWIRE FROM FACTORY PRIOR TO REMOVAL OF STUD.

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