# SDR QMLA2025032720041

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 27, 2025
- Submitted: March 27, 2025
- Operation: Air carrier
- Aircraft: [N184AM](https://openairdocs.org/aircraft/N184AM), registered now
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 54044
- Aircraft time: 6,227 hours, 21,480 cycles
- Engine: Allsn 250C47B
- Engine time: 4,426 hours, 12,759 cycles
- System (JASC): [6220 · Main Rotor Head](https://openairdocs.org/jasc/6220)
- Part: Rotor Head
- Part number: 407010100115
- Part serial: A302
- Condition: Cracked
- Location: Main Rotor
- 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/QMLA2025032720041

## Discrepancy

CRACK FOUND ON MAIN ROTOR HUB BEARING ADAPTER ASSY ON DIAMOND BLADE.  REPLACED MRH ASSY.

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