# SDR MTNA0201501200001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 15, 2012
- Submitted: February 16, 2012
- Operation: Air carrier
- Aircraft: N809FX
- Make and model: Aerosp ATR 72 202
- Registry model: [Aerosp ATR 72 202](https://openairdocs.org/model/aerospatiale-atr-atr-72-202) (OpenAirDocs)
- Aircraft serial: 217
- Aircraft time: 29,275 hours, 28,187 cycles
- System (JASC): [3240 · Landing Gear Brake System](https://openairdocs.org/jasc/3240)
- Part: Master Cylinder
- Part number: 10025111Y00
- Part serial: 554
- Condition: Defective
- Location: Brake System
- Part time: 28,187 hours, 29,275 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: O
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/MTNA0201501200001

## Discrepancy

DURING TAXI OUT OF FLIGHT 8126 THE COPILOTS LEFT BRAKE WAS INOPERATIVE, THE BRAKE WENT TO THE FLOOR.  AFTER TROUBLESHOOTING THE MECHANIC FOUND A BAD BRAKE MASTER CYLINDER. THE MASTER CYLINDER WAS REPLACED IAW ATR72 MM JIC 32-42-13-RAI-10000. THE SYSTEM CHECKED GOOD AND THE AIRCRAFT WAS RETURN TO SERVICE.

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