# SDR AC2A2020111413901

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 13, 2020
- Submitted: November 15, 2020
- Operation: Air carrier
- Aircraft: [N639DS](https://openairdocs.org/aircraft/N639DS), registered now
- Make and model: Agusta AW139
- Registry model: [Agusta AW139](https://openairdocs.org/model/agustawestland-philadelphia-aw139) (OpenAirDocs)
- Aircraft serial: 41262
- Aircraft time: 6,865 hours, 12,672 cycles
- System (JASC): [6321 · Main Rotor Brake](https://openairdocs.org/jasc/6321)
- Part: Control Module
- Part number: 3G6352V01851
- Part serial: FR0084
- Condition: Defective
- Location: Rotor Brake
- Part time: 4,056 hours
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AC2A2020111413901

## Discrepancy

ROTOR BRAKE WILL NOT BUILD PRESSURE.  ROTOR BRAKE CONTROL MODULE WAS FOUND TO BE DEFECTIVE.  MODULE WAS PREVIOUSLY REPAIRED BY MANUFACTURE AND BECAME DEFECTIVE IN 379.9 HOURS OF OPERATION.

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