# SDR MAC5301

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 12, 2005
- Submitted: May 20, 2005
- Operation: Air carrier
- Aircraft: [N907FX](https://openairdocs.org/aircraft/N907FX), registered now
- Make and model: Aerosp ATR 42-320
- Registry model: [Aerosp ATR 42-320](https://openairdocs.org/model/aerospatiale-aeritalia-atr-42-320) (OpenAirDocs)
- Aircraft serial: 286
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Line
- Part number: S291805621300
- Condition: Cracked
- Location: Hydraulic Sys
- Stage of operation: TX
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/MAC5301

## Discrepancy

DURING TAXI, NORMAL BRAKING ACTION WAS LOST.  AFTER TROUBLESHOOTING A TUBE TO THE BRAKE METERING VALVE WAS FOUND TO BE BROKEN.  THE TUBE WAS REPLACED AND THE AIRCRAFT RETURNED TO SERVICE.

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