Divert land due to multiple failures.

Attributes
ACN	277257
Time
Date	199407
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : dtw
State Reference	MI
Altitude	msl bound lower : 41000 msl bound upper : 41000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zob
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	cruise other other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : instrument pilot : cfi pilot : commercial pilot : atp
Experience	flight time last 90 days : 80 flight time total : 5000 flight time type : 1600
ASRS Report	277257
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : private pilot : flight engineer pilot : cfi pilot : atp
Experience	flight time last 90 days : 200 flight time total : 8000 flight time type : 2600
ASRS Report	277247
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	none taken : unable other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Flight lax to bos experienced a series of mechanical malfunctions. We diverted to dtw. During late stage of climb, the center #1 electric hydraulic pump failed and overheated. 2 hours later at cruise, the left generator failed and would not reset. Started APU to provide second electrical source. After both the hydraulic pump failure and generator failure, contacted dispatch and maintenance control while following all company procedures. Approaching the chicago area, noted the right hydraulic quantity had decreased to the 'refill' level. While discussing this item with dispatch and maintenance control, experienced multiple electrical transients which kicked off the automatic-pilots, automatic throttle, and FMS. Accomplished electrical power interruption procedure and elected to divert. Re-released to dtw upon arrival. Dtw maintenance found substantial leak from the hydraulic service access compartment.

Original NASA ASRS Text

Title: DIVERT LAND DUE TO MULTIPLE FAILURES.

Narrative: FLT LAX TO BOS EXPERIENCED A SERIES OF MECHANICAL MALFUNCTIONS. WE DIVERTED TO DTW. DURING LATE STAGE OF CLB, THE CTR #1 ELECTRIC HYD PUMP FAILED AND OVERHEATED. 2 HRS LATER AT CRUISE, THE L GENERATOR FAILED AND WOULD NOT RESET. STARTED APU TO PROVIDE SECOND ELECTRICAL SOURCE. AFTER BOTH THE HYD PUMP FAILURE AND GENERATOR FAILURE, CONTACTED DISPATCH AND MAINT CTL WHILE FOLLOWING ALL COMPANY PROCS. APCHING THE CHICAGO AREA, NOTED THE R HYD QUANTITY HAD DECREASED TO THE 'REFILL' LEVEL. WHILE DISCUSSING THIS ITEM WITH DISPATCH AND MAINT CTL, EXPERIENCED MULTIPLE ELECTRICAL TRANSIENTS WHICH KICKED OFF THE AUTO-PLTS, AUTO THROTTLE, AND FMS. ACCOMPLISHED ELECTRICAL PWR INTERRUPTION PROC AND ELECTED TO DIVERT. RE-RELEASED TO DTW UPON ARR. DTW MAINT FOUND SUBSTANTIAL LEAK FROM THE HYD SVC ACCESS COMPARTMENT.

Data retrieved from NASA's ASRS site as of July 2007 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.