Air carrier medium large transport hydraulic main, and electric backup stabilizer trim failure leads to emergency landing.

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Attributes
ACN	156439
Time
Date	199009
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : gdm
State Reference	MA
Altitude	msl bound lower : 23000 msl bound upper : 23000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zbw tower : ogd
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	descent other
Route In Use	arrival other arrival star : star
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : cfi pilot : commercial pilot : instrument
Experience	flight time last 90 days : 160 flight time total : 10000 flight time type : 75
ASRS Report	156439
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa
Resolutory Action	flight crew : declared emergency none taken : unable other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

In-flight, system 1 and 2 hydraulic fault lights illuminated on the mfds, indicating a hydraulic failure in the stablizer trim system. Followed book procedure to no avail. Back up electrical motor wouldn't work either. Declared emergency and landed normally in bos.

Original NASA ASRS Text

Title: ACR MLG HYDRAULIC MAIN, AND ELECTRIC BACKUP STABILIZER TRIM FAILURE LEADS TO EMERGENCY LNDG.

Narrative: INFLT, SYS 1 AND 2 HYD FAULT LIGHTS ILLUMINATED ON THE MFDS, INDICATING A HYD FAILURE IN THE STABLIZER TRIM SYS. FOLLOWED BOOK PROC TO NO AVAIL. BACK UP ELECTRICAL MOTOR WOULDN'T WORK EITHER. DECLARED EMER AND LANDED NORMALLY IN BOS.

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.