Aircraft diverts to land at altitude field because of hydraulic failure in 1 of its systems.

Attributes
ACN	277303
Time
Date	199407
Day	Mon
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : syr
State Reference	NY
Altitude	msl bound lower : 33000 msl bound upper : 33000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zob tracon : jfk tower : lvk
Operator	common carrier : air carrier
Make Model Name	A310
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : cfi pilot : atp
Experience	flight time last 90 days : 40 flight time total : 22000 flight time type : 52
ASRS Report	277303
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 19789 flight time type : 3500
ASRS Report	277508
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	Other
Supplementary
Primary Problem	Aircraft

Narrative:

Experienced a green hydraulic system failure. Was en route cvg-ory. Diverted into jfk. Declared an emergency. Abnormal procedures worked fine. No problems with ATC. Requested runway 31L at jfk because it's the longest runway 31L was not available due to equipment on runway 31R was next longest runway and approach said it was available. As we interrupted the localizer for runway 31R. Tower asked if we were receiving the GS. We weren't tower said technicians were trying to get the GS working. The GS never worked and no VASI on runway 31R. I would have preferred a runway with vertical guidance as it was night and we were making an overweight land. Other than that, no problems. Supplemental information from acn 277508: aircraft had a history of a very slow hydraulic leak (main green system) for about a week (would have to add fluid after 2-3 international legs. Maintenance had just changed the green and yellow system fluid shut-off valves just prior to our flight. Turned green pumps off but fluid level continued to decrease and eventually went to zero (took another 20 mins). Accomplished loss of green system abnormal checklists, manually extended the gear, we declared an emergency, got ATC vectors to jfk and made a over grass landing on runway 31R (smooth touchdown 293000 pounds.

Original NASA ASRS Text

Title: ACFT DIVERTS TO LAND AT ALT FIELD BECAUSE OF HYD FAILURE IN 1 OF ITS SYSTEMS.

Narrative: EXPERIENCED A GREEN HYD SYS FAILURE. WAS ENRTE CVG-ORY. DIVERTED INTO JFK. DECLARED AN EMER. ABNORMAL PROCS WORKED FINE. NO PROBLEMS WITH ATC. REQUESTED RWY 31L AT JFK BECAUSE IT'S THE LONGEST RWY 31L WAS NOT AVAILABLE DUE TO EQUIP ON RWY 31R WAS NEXT LONGEST RWY AND APCH SAID IT WAS AVAILABLE. AS WE INTERRUPTED THE LOC FOR RWY 31R. TWR ASKED IF WE WERE RECEIVING THE GS. WE WEREN'T TWR SAID TECHNICIANS WERE TRYING TO GET THE GS WORKING. THE GS NEVER WORKED AND NO VASI ON RWY 31R. I WOULD HAVE PREFERRED A RWY WITH VERT GUIDANCE AS IT WAS NIGHT AND WE WERE MAKING AN OVERWT LAND. OTHER THAN THAT, NO PROBS. SUPPLEMENTAL INFO FROM ACN 277508: ACFT HAD A HISTORY OF A VERY SLOW HYD LEAK (MAIN GREEN SYS) FOR ABOUT A WK (WOULD HAVE TO ADD FLUID AFTER 2-3 INTL LEGS. MAINT HAD JUST CHANGED THE GREEN AND YELLOW SYS FLUID SHUT-OFF VALVES JUST PRIOR TO OUR FLT. TURNED GREEN PUMPS OFF BUT FLUID LEVEL CONTINUED TO DECREASE AND EVENTUALLY WENT TO ZERO (TOOK ANOTHER 20 MINS). ACCOMPLISHED LOSS OF GREEN SYS ABNORMAL CHKLISTS, MANUALLY EXTENDED THE GEAR, WE DECLARED AN EMER, GOT ATC VECTORS TO JFK AND MADE A OVER GRASS LNDG ON RWY 31R (SMOOTH TOUCHDOWN 293000 LBS.

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.