Medium large transport has hydraulic pressure loss during approach. Diverts to land.

Attributes
ACN	273638
Time
Date	199406
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : mht airport : bdl
State Reference	NH
Altitude	msl bound lower : 5000 msl bound upper : 5000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : mht tracon : mci
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent : approach
Route In Use	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 : 60 flight time total : 10000 flight time type : 60
ASRS Report	273638
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : critical
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:

While being vectored for final approach into mht, we lost hydraulic quantity and pressure in 'hydraulic system 1.' due to the circumstances, I elected to divert to an airport that had a longer runway than mht. The airport I diverted to was bdl (windsor locks, ct). Again, due to the circumstances associated with the loss of the hydraulic system, I found it prudent to declare an emergency with ATC, advise them of the situation and to arrange for the emergency equipment to be standing by, also that the aircraft would stop and remain on the runway until it could be towed to the gate by maintenance. The whole thing went without a hitch, we landed safely, stopped on the runway and waited to be towed by maintenance as expected.

Original NASA ASRS Text

Title: MLG HAS HYD PRESSURE LOSS DURING APCH. DIVERTS TO LAND.

Narrative: WHILE BEING VECTORED FOR FINAL APCH INTO MHT, WE LOST HYD QUANTITY AND PRESSURE IN 'HYD SYS 1.' DUE TO THE CIRCUMSTANCES, I ELECTED TO DIVERT TO AN ARPT THAT HAD A LONGER RWY THAN MHT. THE ARPT I DIVERTED TO WAS BDL (WINDSOR LOCKS, CT). AGAIN, DUE TO THE CIRCUMSTANCES ASSOCIATED WITH THE LOSS OF THE HYD SYS, I FOUND IT PRUDENT TO DECLARE AN EMER WITH ATC, ADVISE THEM OF THE SIT AND TO ARRANGE FOR THE EMER EQUIP TO BE STANDING BY, ALSO THAT THE ACFT WOULD STOP AND REMAIN ON THE RWY UNTIL IT COULD BE TOWED TO THE GATE BY MAINT. THE WHOLE THING WENT WITHOUT A HITCH, WE LANDED SAFELY, STOPPED ON THE RWY AND WAITED TO BE TOWED BY MAINT AS EXPECTED.

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.