Hydraulic failure.

Attributes
ACN	273936
Time
Date	199406
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : buf
State Reference	NY
Altitude	msl bound lower : 2000 msl bound upper : 2000
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	tracon : buf tower : buf tower : ord
Operator	common carrier : air carrier
Make Model Name	B737-200
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent : approach landing other other
Route In Use	approach : straight in arrival other enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 8500 flight time type : 2500
ASRS Report	273936
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 8500 flight time type : 2400
ASRS Report	273933
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 flight crew : overcame equipment problem other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

When gear was lowered for landing, 'a' hydraulic system pressure and quantity went to zero. A missed approach was executed. The gear and flaps were lowered by alternate means. The emergency equipment was called out as a precaution. No emergency was declared. Subsequent landing was uneventful. Aircraft was eased off the runway onto a high speed taxiway, shut down and towed to the gate. Subsequent investigation revealed a leak in the nose gear hydraulic down line.

Original NASA ASRS Text

Title: HYD FAILURE.

Narrative: WHEN GEAR WAS LOWERED FOR LNDG, 'A' HYD SYS PRESSURE AND QUANTITY WENT TO ZERO. A MISSED APCH WAS EXECUTED. THE GEAR AND FLAPS WERE LOWERED BY ALTERNATE MEANS. THE EMER EQUIP WAS CALLED OUT AS A PRECAUTION. NO EMER WAS DECLARED. SUBSEQUENT LNDG WAS UNEVENTFUL. ACFT WAS EASED OFF THE RWY ONTO A HIGH SPD TXWY, SHUT DOWN AND TOWED TO THE GATE. SUBSEQUENT INVESTIGATION REVEALED A LEAK IN THE NOSE GEAR HYD DOWN LINE.

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.