|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||1201 To 1800|
|Locale Reference||atc facility : zzz.artcc|
|Altitude||msl single value : 34000|
|Controlling Facilities||artcc : zzz.artcc|
|Operator||common carrier : air carrier|
|Make Model Name||B757-200|
|Operating Under FAR Part||Part 121|
|Flight Phase||cruise : level|
|Affiliation||company : air carrier|
|Function||flight crew : captain|
oversight : pic
|Anomaly||aircraft equipment problem : critical|
|Independent Detector||other flight crewa|
|Resolutory Action||flight crew : diverted to another airport|
flight crew : landed as precaution
About 30 mins into cruise flight; the left system hydraulic quantity RF was displaced. The value was about .43. Completed procedure in QRH and made the decision to divert to ZZZ for maintenance. Aircraft was well within performance limits for overweight landing. Prior to landing turn left hydraulic pumps back on; quantity continued to decrease to approximately .32 at touchdown. Turned pumps back off. Aircraft landed at 208000 pounds; 125 ft sink rate; normal landing. Emergency equipment was standing by. After clearing runway shut left engine down as a precaution. Taxi to gate under aircraft power.
Original NASA ASRS Text
Title: B757 DIVERTED AS A RESULT OF LOSING LEFT HYD SYSTEM FLUID. SUCCESSFUL OVERWEIGHT LNDG ACCOMPLISHED.
Narrative: ABOUT 30 MINS INTO CRUISE FLT; THE L SYS HYD QUANTITY RF WAS DISPLACED. THE VALUE WAS ABOUT .43. COMPLETED PROC IN QRH AND MADE THE DECISION TO DIVERT TO ZZZ FOR MAINT. ACFT WAS WELL WITHIN PERFORMANCE LIMITS FOR OVERWT LNDG. PRIOR TO LNDG TURN L HYD PUMPS BACK ON; QUANTITY CONTINUED TO DECREASE TO APPROX .32 AT TOUCHDOWN. TURNED PUMPS BACK OFF. ACFT LANDED AT 208000 LBS; 125 FT SINK RATE; NORMAL LNDG. EMER EQUIP WAS STANDING BY. AFTER CLRING RWY SHUT L ENG DOWN AS A PRECAUTION. TAXI TO GATE UNDER ACFT PWR.
Data retrieved from NASA's ASRS site as of January 2009 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.