Major hydraulic failure of an medium large transport aircraft caused both left main tires to be blow...

Attributes
ACN	256797
Time
Date	199311
Day	Sat
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : sjc
State Reference	CA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 4000
ASRS Report	256797
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : declared emergency other
Consequence	faa : investigated other Other
Supplementary
Primary Problem	Aircraft

Narrative:

On routine passenger flight from dfw to sjc, we had intermediate level off at FL310. We noticed hydraulic low quantity light illuminate on right hydraulic system. Quantity indicated 3 quarts. We accomplished abnormal procedures, contacted company flight control, then continued on to sjc. On approach into sjc, we pressurized the hydraulic system and extended the flap handle to 15 degrees. Now both left and right hydraulic system indicated zero pressure. We accomplished abnormal procedures and eventually got the flaps to landing confign. We landed in sjc with pumps turned off (as per the procedure) with only accumulator pressure available for brakes and no nosewheel steering. We landed on centerline, on speed. The aircraft began to drift right. The captain applied left differential braking to return to centerline and we came to stop with 3-4000 ft remaining. Both left tires were blown. Passenger were deplaned through aft stairway and transported to terminal .very smooth touchdown and rollout -- no injuries. Found out later, the right hydraulic pump failed and we lost fluid. All procedures were complied with and no other problems were encountered. The runway was closed until they could tow the aircraft off. Crew coordination was great, ATC very helpful. No other factors noteworthy to report.

Original NASA ASRS Text

Title: MAJOR HYD FAILURE OF AN MLG ACFT CAUSED BOTH L MAIN TIRES TO BE BLOWN DURING LNDG ROLLOUT AND THE PAX TO BE DEPLANED ON THE RWY.

Narrative: ON ROUTINE PAX FLT FROM DFW TO SJC, WE HAD INTERMEDIATE LEVEL OFF AT FL310. WE NOTICED HYD LOW QUANTITY LIGHT ILLUMINATE ON R HYD SYS. QUANTITY INDICATED 3 QUARTS. WE ACCOMPLISHED ABNORMAL PROCS, CONTACTED COMPANY FLT CTL, THEN CONTINUED ON TO SJC. ON APCH INTO SJC, WE PRESSURIZED THE HYD SYS AND EXTENDED THE FLAP HANDLE TO 15 DEGS. NOW BOTH L AND R HYD SYS INDICATED ZERO PRESSURE. WE ACCOMPLISHED ABNORMAL PROCS AND EVENTUALLY GOT THE FLAPS TO LNDG CONFIGN. WE LANDED IN SJC WITH PUMPS TURNED OFF (AS PER THE PROC) WITH ONLY ACCUMULATOR PRESSURE AVAILABLE FOR BRAKES AND NO NOSEWHEEL STEERING. WE LANDED ON CTRLINE, ON SPD. THE ACFT BEGAN TO DRIFT R. THE CAPT APPLIED L DIFFERENTIAL BRAKING TO RETURN TO CTRLINE AND WE CAME TO STOP WITH 3-4000 FT REMAINING. BOTH L TIRES WERE BLOWN. PAX WERE DEPLANED THROUGH AFT STAIRWAY AND TRANSPORTED TO TERMINAL .VERY SMOOTH TOUCHDOWN AND ROLLOUT -- NO INJURIES. FOUND OUT LATER, THE R HYD PUMP FAILED AND WE LOST FLUID. ALL PROCS WERE COMPLIED WITH AND NO OTHER PROBS WERE ENCOUNTERED. THE RWY WAS CLOSED UNTIL THEY COULD TOW THE ACFT OFF. CREW COORD WAS GREAT, ATC VERY HELPFUL. NO OTHER FACTORS NOTEWORTHY TO RPT.

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.

Major hydraulic failure of an medium large transport aircraft caused both left main tires to be blown during landing rollout and the passenger to be deplaned on the runway.