Flight crew of air carrier large transport aircraft made a successful emergency landing after using ...

Attributes
ACN	236067
Time
Date	199303
Day	Mon
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : pit
State Reference	PA
Altitude	msl bound lower : 3000 msl bound upper : 5000
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : pit tower : bkl
Operator	common carrier : air carrier
Make Model Name	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 : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 25000 flight time type : 800
ASRS Report	236067
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : overcame equipment problem flight crew : declared emergency
Consequence	faa : investigated Other
Supplementary
Primary Problem	Aircraft

Narrative:

On mar/xx/93, I was the captain on air carrier flight lax-pit, which was an large transport. En route a left hydraulic quantity EICAS message appeared. This was followed shortly by the loss of all left hydraulic quantity. The appropriate abnormal checklist was accomplished and the 'alternate flap operation' and 'alternate gear extension' abnormal checklists were reviewed in anticipation of our arrival in pit. Upon arrival in pit terminal area, the alternate flap operation proceeded normally. However, when the alternate gear extension switch was pushed the nose gear and right main gear extended normally, but there was no green light on the left main gear. A gear disagree light EICAS message appeared and there was a gear door light. A missed approach was executed. The aircraft was observed by crash fire rescue equipment personnel as it passed over the airport. The crash fire rescue equipment personnel reported that the nose gear and right main gear were down and that the left main gear door was open but the gear appeared retracted. We declared an emergency and then proceeded to a holding pattern and conferred with company maintenance personnel by radio. The 'gear disagree' and 'gear doors' abnormal procedures were complied with. It was then decided to apply a positive 'G' load to the aircraft. This resulted in the disappearance of the 'gear disagree' EICAS message. However, there was no green light on the left main gear. It was then decided to make a touch-and-go landing to assist in locking down the left main gear. This was accomplished and crash fire rescue equipment personnel now reported that the left main gear appeared down. As we flew around the airport for the final approach and landing, the flight attendants completed the cabin preparation and briefing in the event an evacuate/evacuation was necessary on landing. I held the left main gear off as long as possible. Rollout was normal and turn off the runway using differential braking was accomplished. The aircraft was towed to the terminal.

Original NASA ASRS Text

Title: FLC OF ACR LGT ACFT MADE A SUCCESSFUL EMER LNDG AFTER USING ALTERNATE MEANS TO LOWER THE L LNDG GEAR DUE TO A HYD FAILURE.

Narrative: ON MAR/XX/93, I WAS THE CAPT ON ACR FLT LAX-PIT, WHICH WAS AN LGT. ENRTE A L HYD QUANTITY EICAS MESSAGE APPEARED. THIS WAS FOLLOWED SHORTLY BY THE LOSS OF ALL L HYD QUANTITY. THE APPROPRIATE ABNORMAL CHKLIST WAS ACCOMPLISHED AND THE 'ALTERNATE FLAP OP' AND 'ALTERNATE GEAR EXTENSION' ABNORMAL CHKLISTS WERE REVIEWED IN ANTICIPATION OF OUR ARR IN PIT. UPON ARR IN PIT TERMINAL AREA, THE ALTERNATE FLAP OP PROCEEDED NORMALLY. HOWEVER, WHEN THE ALTERNATE GEAR EXTENSION SWITCH WAS PUSHED THE NOSE GEAR AND R MAIN GEAR EXTENDED NORMALLY, BUT THERE WAS NO GREEN LIGHT ON THE L MAIN GEAR. A GEAR DISAGREE LIGHT EICAS MESSAGE APPEARED AND THERE WAS A GEAR DOOR LIGHT. A MISSED APPROACH WAS EXECUTED. THE ACFT WAS OBSERVED BY CFR PERSONNEL AS IT PASSED OVER THE ARPT. THE CFR PERSONNEL RPTED THAT THE NOSE GEAR AND R MAIN GEAR WERE DOWN AND THAT THE L MAIN GEAR DOOR WAS OPEN BUT THE GEAR APPEARED RETRACTED. WE DECLARED AN EMER AND THEN PROCEEDED TO A HOLDING PATTERN AND CONFERRED WITH COMPANY MAINT PERSONNEL BY RADIO. THE 'GEAR DISAGREE' AND 'GEAR DOORS' ABNORMAL PROCS WERE COMPLIED WITH. IT WAS THEN DECIDED TO APPLY A POSITIVE 'G' LOAD TO THE ACFT. THIS RESULTED IN THE DISAPPEARANCE OF THE 'GEAR DISAGREE' EICAS MESSAGE. HOWEVER, THERE WAS NO GREEN LIGHT ON THE L MAIN GEAR. IT WAS THEN DECIDED TO MAKE A TOUCH-AND-GO LNDG TO ASSIST IN LOCKING DOWN THE L MAIN GEAR. THIS WAS ACCOMPLISHED AND CFR PERSONNEL NOW RPTED THAT THE L MAIN GEAR APPEARED DOWN. AS WE FLEW AROUND THE ARPT FOR THE FINAL APCH AND LNDG, THE FLT ATTENDANTS COMPLETED THE CABIN PREPARATION AND BRIEFING IN THE EVENT AN EVAC WAS NECESSARY ON LNDG. I HELD THE L MAIN GEAR OFF AS LONG AS POSSIBLE. ROLLOUT WAS NORMAL AND TURN OFF THE RWY USING DIFFERENTIAL BRAKING WAS ACCOMPLISHED. THE ACFT WAS TOWED TO THE TERMINAL.

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.

Flight crew of air carrier large transport aircraft made a successful emergency landing after using alternate means to lower the left landing gear due to a hydraulic failure.