# SDR MTNA2017062701

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 27, 2017
- Submitted: June 29, 2017
- Operation: Air carrier
- Aircraft: [N909FX](https://openairdocs.org/aircraft/N909FX), registered now
- Make and model: Aerosp ATR 42-300
- Registry model: [Aerosp ATR 42-300](https://openairdocs.org/model/aerospatiale-aeritalia-atr-42-300) (OpenAirDocs)
- Aircraft serial: 275
- Aircraft time: 26,999 hours, 30,974 cycles
- System (JASC): [3243 · Master Cylinder/Brake Valve](https://openairdocs.org/jasc/3243)
- Part: Master Cylinder
- Part number: 10025111Y00
- Part serial: 554
- Condition: Inoperative
- Location: Brakes
- 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/MTNA2017062701

## Discrepancy

DURING TAXI, THE AIRCRAFT EXPERIENCED A COMPLETE BRAKE FAILURE. THE AIRCRAFT WAS STOPPED USING THE EMERGENCY BRAKE, AND RETURNED TO GATE WITHOUT INCIDENT. THE FO'S MASTER CYLINDER WAS REPLACED, ALONG WITH THE LOW-PRESSURE RESERVOIR AND THE METERING VALVE. THE LOW-PRESSURE SYSTEM WAS BLED, THE OPERATIONAL CHECK WAS GOOD, AND THE AIRCRAFT WAS RETURNED TO SERVICE.

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