# SDR DALA2015110106687

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 1, 2015
- Submitted: November 3, 2015
- Operation: Air carrier
- Aircraft: [N721TW](https://openairdocs.org/aircraft/N721TW), registered now
- Make and model: Boeing 757231
- Aircraft serial: 29954
- Aircraft time: 58,567 hours, 16,465 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Line
- Condition: Failed
- Location: Hyd System
- Stage of operation: CL
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2015110106687

## Discrepancy

CREW PERFORMED ATB DUE TO LT HYD SYS FAILURE.  NR 5 AND NR 6 TIRES ALSO FOUND TO HAVE FAILED.  DECLARED AN EMERGENCY WITH ATC, ARFF MET THE ACFT AFTER STOPPING ON THE RUNWAY, AND ACFT WAS TOWED OFF THE RUNWAY.  REPLACED A HYDRAULIC LINE FROM THE TILT PRESSURE SWITCH.  INSTALLED NEW EDP CASE DRAIN FILTER.  REPLACED THE ACMP CASE DRAIN AND PRESSURE /RETURN FILTERS.  R & R THE ACMP AND EDP IAW AMM 29-11.  PTU FILTER CHECKED AND CLEAN.  OPS CK AND LEAK CK GOOD.  REF ERA 541080-14 FOR WORK PERFORMED.

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