# SDR UALA2011121906948

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 18, 2011
- Submitted: December 19, 2011
- Operation: Air carrier
- Aircraft: [N787UA](https://openairdocs.org/aircraft/N787UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26939
- Aircraft time: 64,707 hours, 9,482 cycles
- Engine: Pwa PW40903
- System (JASC): [2760 · Drag Control System](https://openairdocs.org/jasc/2760)
- Part: Unknown
- Condition: Malfunctioned
- Location: Speed Brake
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2011121906948

## Discrepancy

SPEEDBRAKE DID NOT EXTEND.  DEPLOYED MANUALLY.  DEF PER MEL. -INF-  :BOEING AHM DOWNLINKING MMSGS 32-11910, 12760, 12010, 12860 REF MT 27-029R2 & 27-UA08.  THE MT'S REFERENCED MMSG'S NOT DISPLAYED BUT APPEARS BOTH MLG TILT ACTUATORS EXPERIENCING LOW PRESSURE DUE TO BYPASSING HYDRAULIC COMPONENTS WHICH IS KNOWN ISSUE FOR THIS FDE. OK - :MESSAGES CORRELATED TO AUTO SPEEDBRAKE WERE 34-25603 AND 34-25800 WHICH FAULTED 6 LEGS AGO.  ACCOMPLISHED TAT TEST PER MM AND AOA TEST PER MM34-21-04.  NO FAULTS.  ACCMP'D AUTO SPEEDBRAKE 26592 TEST PER MM.  TEST PASSED.  SYSTEM CK'S NORMAL.

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