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A B757 captain reported low center hydraulic system fluid during descent at 11000 ft. QRH procedures were complied with and system maintained pressure to the gate. A rolling tendency developed on short final which was easily countered but it was unexplained.
| Attributes | |
| ACN | 844565 |
| Time | |
| Date | 200907 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Hydraulic Fluid |
| Person 1 | |
| Function | Pilot Not Flying Captain |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe |
Narrative:
We were alerted to a low fluid quantity in the center hydraulic system; by an EICAS message and the center system reservoir light. The quantity in the center system remained stable at .38. Pressure held constant at 2890 to 2910 pounds until parked at gate. We followed the QRH and declared an emergency. All other systems were normal until short final; where the aircraft started a right wing down rolling moment. The roll was countered with left aileron and was controllable. Landing was uneventful. We cleared the runway and stopped so emergency personnel could check for any unsafe condition. They were unable to determine whether or where the leak occurred. We elected to retract the flaps and spoilers and taxi to the gate. We did not start the APU.
Original NASA ASRS Text
Title: A B757 Captain reported low center hydraulic system fluid during descent at 11000 FT. QRH procedures were complied with and system maintained pressure to the gate. A rolling tendency developed on short final which was easily countered but it was unexplained.
Narrative: We were alerted to a low fluid quantity in the center hydraulic system; by an EICAS message and the center system reservoir light. The quantity in the center system remained stable at .38. Pressure held constant at 2890 to 2910 pounds until parked at gate. We followed the QRH and declared an emergency. All other systems were normal until short final; where the aircraft started a right wing down rolling moment. The roll was countered with left aileron and was controllable. Landing was uneventful. We cleared the runway and stopped so emergency personnel could check for any unsafe condition. They were unable to determine whether or where the leak occurred. We elected to retract the flaps and spoilers and taxi to the gate. We did not start the APU.
Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.