A B737-200 on landing declared an emergency due to complete loss of 'a' system hydraulic pressure an...

Attributes
ACN	423049
Time
Date	199812
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : roc
State Reference	NY
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Flight Phase	ground other : taxi landing other other
Flight Plan	None
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : cfi
Experience	flight time last 90 days : 180 flight time total : 9000 flight time type : 3500
ASRS Report	423049
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Experience	flight time last 90 days : 210 flight time total : 15000 flight time type : 950
ASRS Report	422811
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : declared emergency none taken : unable
Consequence	Other

Narrative:

'A' system hydraulic failure necessitating emergency gear extension, and a partial flap landing (15 degrees flaps) with nosewheel steering inoperative. Elected to taxi clear at high speed taxiway then shut down versus shutting down on the runway because we had 3 down and locked indications and the turnoff was very gradually done at very low speeds. There were no injuries or damage to the aircraft done. An emergency was declared because a flight attendant noticed clear fluid 'spewing' visually on the top surface of the wing. Wanted traffic priority to expedite the landing and also to have fire equipment standing by. Callback conversation with reporter revealed the following information: the reporter stated the aircraft was a B737-200 and that the fluid loss was a failed coupling and line in the leading edge of the left wing and was a pressure line for the leading edge devices. The reporter said this was the second hydraulic failure of the 'a' system in 1 month. The reporter stated in nov/98 a line failed in the main wheel well causing a complete loss of pressure and quantity.

Original NASA ASRS Text

Title: A B737-200 ON LNDG DECLARED AN EMER DUE TO COMPLETE LOSS OF 'A' SYS HYD PRESSURE AND QUANTITY CAUSED BY A FAILED COUPLING AND SECTION OF LINE IN THE L WING LEADING EDGE.

Narrative: 'A' SYS HYD FAILURE NECESSITATING EMER GEAR EXTENSION, AND A PARTIAL FLAP LNDG (15 DEGS FLAPS) WITH NOSEWHEEL STEERING INOP. ELECTED TO TAXI CLR AT HIGH SPD TXWY THEN SHUT DOWN VERSUS SHUTTING DOWN ON THE RWY BECAUSE WE HAD 3 DOWN AND LOCKED INDICATIONS AND THE TURNOFF WAS VERY GRADUALLY DONE AT VERY LOW SPDS. THERE WERE NO INJURIES OR DAMAGE TO THE ACFT DONE. AN EMER WAS DECLARED BECAUSE A FLT ATTENDANT NOTICED CLR FLUID 'SPEWING' VISUALLY ON THE TOP SURFACE OF THE WING. WANTED TFC PRIORITY TO EXPEDITE THE LNDG AND ALSO TO HAVE FIRE EQUIP STANDING BY. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE ACFT WAS A B737-200 AND THAT THE FLUID LOSS WAS A FAILED COUPLING AND LINE IN THE LEADING EDGE OF THE L WING AND WAS A PRESSURE LINE FOR THE LEADING EDGE DEVICES. THE RPTR SAID THIS WAS THE SECOND HYD FAILURE OF THE 'A' SYS IN 1 MONTH. THE RPTR STATED IN NOV/98 A LINE FAILED IN THE MAIN WHEEL WELL CAUSING A COMPLETE LOSS OF PRESSURE AND QUANTITY.

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.

A B737-200 on landing declared an emergency due to complete loss of 'a' system hydraulic pressure and quantity caused by a failed coupling and section of line in the left wing leading edge.