Air carrier large transport lost one hydraulic system on gear retraction. Return and land after manu...

Attributes
ACN	100265
Time
Date	198812
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : dtw
State Reference	MI
Altitude	msl bound lower : 800 msl bound upper : 6000
Environment
Flight Conditions	Mixed
Light	Night
Aircraft 1
Controlling Facilities	tracon : dtw
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	climbout : initial
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 150 flight time total : 6500 flight time type : 2000
ASRS Report	100265
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	other flight crewa
Resolutory Action	flight crew : overcame equipment problem other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Upon retracting landing gear after takeoff, all gear retracted normally, but left 'door' warning light stayed on. Simultaneously system 'a' hydraulic low pressure lights illuminated. Second officer verified complete loss of 'a' hydraulic fluid and pressure. Advised dtw departure of need to return to field after dumping 15000 pounds fuel to reduce to maximum landing weight (150,000 pounds). Climbed to 6000', dumped fuel, accomplished abnormal checklists, returned and landed without incident at dtw after manual gear crank, maintenance inspection discovered broken line on 'a' hydraulics near left gear assembly.

Original NASA ASRS Text

Title: ACR LGT LOST ONE HYDRAULIC SYSTEM ON GEAR RETRACTION. RETURN AND LAND AFTER MANUAL GEAR EXTENSION.

Narrative: UPON RETRACTING LNDG GEAR AFTER TKOF, ALL GEAR RETRACTED NORMALLY, BUT LEFT 'DOOR' WARNING LIGHT STAYED ON. SIMULTANEOUSLY SYSTEM 'A' HYDRAULIC LOW PRESSURE LIGHTS ILLUMINATED. S/O VERIFIED COMPLETE LOSS OF 'A' HYDRAULIC FLUID AND PRESSURE. ADVISED DTW DEP OF NEED TO RETURN TO FIELD AFTER DUMPING 15000 LBS FUEL TO REDUCE TO MAX LNDG WEIGHT (150,000 LBS). CLIMBED TO 6000', DUMPED FUEL, ACCOMPLISHED ABNORMAL CHECKLISTS, RETURNED AND LANDED WITHOUT INCIDENT AT DTW AFTER MANUAL GEAR CRANK, MAINT INSPECTION DISCOVERED BROKEN LINE ON 'A' HYDRAULICS NEAR LEFT GEAR ASSEMBLY.

Data retrieved from NASA's ASRS site as of August 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.

Air carrier large transport lost one hydraulic system on gear retraction. Return and land after manual gear extension.