A B757-200 immediately after takeoff when landing gear retracted lost the left hydraulic system pres...

Attributes
ACN	413573
Time
Date	199809
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : lax airport : las
State Reference	NV
Altitude	agl bound lower : 200 agl bound upper : 200
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : las tower : las
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	climbout : takeoff climbout : initial other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 220 flight time total : 20000 flight time type : 2500
ASRS Report	413573
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Flight xyz aircraft YYY lost left hydraulic system on takeoff immediately following gear retraction. Fluid lost through nose wheel well. Made normal landing at flaps 20 degrees setting after completing hydraulic system failure checklist. Extended landing gear and flaps by means of alternate system. Emergency was not declared. Aircraft was towed to the gate by maintenance personnel after landing as nosewheel steering was lost. The biggest distraction was ATC's incessant and mostly unnecessary questions, such as 'do you need to dump fuel?' I was asked this question at least 3 times. We were very busy completing required checklists and repeatedly had to politely inform ATC that we would advise them when we would be returning for landing. Callback conversation with reporter revealed the following information: the reporter said this is the third occurrence of loss of the left hydraulics from the nose gear components. The reporter said this incident was caused by a failed flexible hydraulic pressure hose on the gear actuator or the nose gear door actuator. The reporter stated the exact hose function was not known but it was a hose in 1 of the 2 actuators.

Original NASA ASRS Text

Title: A B757-200 IMMEDIATELY AFTER TKOF WHEN LNDG GEAR RETRACTED LOST THE L HYD SYS PRESSURE AND QUANTITY DUE TO A FAILED NOSE GEAR FLEXIBLE HOSE.

Narrative: FLT XYZ ACFT YYY LOST L HYD SYS ON TKOF IMMEDIATELY FOLLOWING GEAR RETRACTION. FLUID LOST THROUGH NOSE WHEEL WELL. MADE NORMAL LNDG AT FLAPS 20 DEGS SETTING AFTER COMPLETING HYD SYS FAILURE CHKLIST. EXTENDED LNDG GEAR AND FLAPS BY MEANS OF ALTERNATE SYS. EMER WAS NOT DECLARED. ACFT WAS TOWED TO THE GATE BY MAINT PERSONNEL AFTER LNDG AS NOSEWHEEL STEERING WAS LOST. THE BIGGEST DISTR WAS ATC'S INCESSANT AND MOSTLY UNNECESSARY QUESTIONS, SUCH AS 'DO YOU NEED TO DUMP FUEL?' I WAS ASKED THIS QUESTION AT LEAST 3 TIMES. WE WERE VERY BUSY COMPLETING REQUIRED CHKLISTS AND REPEATEDLY HAD TO POLITELY INFORM ATC THAT WE WOULD ADVISE THEM WHEN WE WOULD BE RETURNING FOR LNDG. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR SAID THIS IS THE THIRD OCCURRENCE OF LOSS OF THE L HYDS FROM THE NOSE GEAR COMPONENTS. THE RPTR SAID THIS INCIDENT WAS CAUSED BY A FAILED FLEXIBLE HYD PRESSURE HOSE ON THE GEAR ACTUATOR OR THE NOSE GEAR DOOR ACTUATOR. THE RPTR STATED THE EXACT HOSE FUNCTION WAS NOT KNOWN BUT IT WAS A HOSE IN 1 OF THE 2 ACTUATORS.

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 B757-200 immediately after takeoff when landing gear retracted lost the left hydraulic system pressure and quantity due to a failed nose gear flexible hose.