# SDR HEED089083

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 14, 2002
- Submitted: September 15, 2003
- Operation: Air carrier
- Aircraft: N407XM
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 53464
- Aircraft time: 1,093 hours
- System (JASC): [6520 · Tail Rotor Gearbox](https://openairdocs.org/jasc/6520)
- Part: Gearbox
- Part number: 406040400117
- Part serial: A1204
- Condition: Vibration
- Location: Tail Rotor
- Part time: 1,093 hours
- Stage of operation: NR
- How discovered: O
- Nature of condition: E
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HEED089083

## Discrepancy

UNEXPLAINED TAIL ROTOR VIBRATION AND GRITTY SUBSTANCE IN GEARBOX. REPLACE UNIT.

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