# SDR 2005FA0000134

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 16, 2005
- Submitted: February 16, 2005
- Operation: General aviation
- Aircraft: [N17SP](https://openairdocs.org/aircraft/N17SP), registered now
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 53444
- Aircraft time: 1,302 hours
- Engine: Allsn 250C47B
- System (JASC): [6230 · Main Rotor Mast/Swashplate](https://openairdocs.org/jasc/6230)
- Part: Cone
- Part number: 407010104109
- Condition: Worn
- Location: M/R Mast
- Component: Mast, Bell
- Component part number: 407040011101
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2005FA0000134

## Discrepancy

REPLACED MAIN ROTOR MAST CONE PN 407-010-104-109 FOR HUB SHIFT/MAST NUT TORQUE STABILIZATION PROBLEM.  ORDERED NEW CONE P/N 407-010-104-109 FROM MFG. NEW PART WAS RECEIVED WITH A WEAR GROOVE IN CENTER OF CONE FACE (APPEARED USED).   REORDERED ANOTHER NEW CONE AND INSTALLED.  INSTALLED MAST NUT AND STABILIZED TORQUE.

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