# SDR QMLA2025011720003

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 14, 2025
- Submitted: January 17, 2025
- Operation: Air carrier
- Aircraft: [N189AM](https://openairdocs.org/aircraft/N189AM), registered now
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 54047
- Aircraft time: 6,250 hours, 15,171 cycles
- System (JASC): [6330 · Main Rotor Transmission Mount](https://openairdocs.org/jasc/6330)
- Part: Mount
- Part number: 4073102030101
- Part serial: KA2081KA2062
- Condition: Delaminated
- Location: Transmission
- Stage of operation: AP
- 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/QMLA2025011720003

## Discrepancy

PILOT REPORTED AN UNUSUAL VIBRATION IN FLIGHT. AFTER INSPECTING TRANSMISSION CORNER MOUNTS WE FOUND THAT THE LH CORNER MOUNTS WERE DELAMINATING/SEPARATING. WE JUST INSTALLED THESE CORNER MOUNTS ON 10/11/25 AND SHOULDN'T HAVE FAILED ALREADY.

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