# SDR AC2A2021102913901

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 28, 2021
- Submitted: October 29, 2021
- Operation: Air carrier
- Aircraft: [N639MC](https://openairdocs.org/aircraft/N639MC), registered now
- Make and model: Agusta AW139
- Registry model: [Agusta AW139](https://openairdocs.org/model/agustawestland-philadelphia-aw139) (OpenAirDocs)
- Aircraft serial: 41288
- Aircraft time: 7,024 hours, 12,464 cycles
- System (JASC): [6321 · Main Rotor Brake](https://openairdocs.org/jasc/6321)
- Part: Actuator
- Part number: 3G6352V02452
- Part serial: 2370
- Condition: Stuck
- Part time: 2,789 hours, 5,788 cycles
- Stage of operation: IN
- How discovered: C
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AC2A2021102913901

## Discrepancy

ROTOR BRAKE INOP, FOUND ROTOR BRAKE ACTUATOR WILL NOT ACTUATE (STUCK)

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