B737-300 crew had 'B' system hydraulic failure.

Attributes
ACN	535450
Time
Date	200201
Day	Sat
Local Time Of Day	1801 To 2400
Place
Locale Reference	intersection : triny
State Reference	PA
Altitude	msl single value : 3000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : pit.tracon
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer & glide slope : 32 other
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Aircraft 2
Route In Use	approach : visual
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : commercial pilot : flight engineer pilot : instrument pilot : multi engine
Experience	flight time last 90 days : 200 flight time total : 25000 flight time type : 9000
ASRS Report	535450
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical non adherence : company policies non adherence : far non adherence : published procedure other anomaly other
Independent Detector	other flight crewa other flight crewb
Resolutory Action	controller : provided flight assist controller : issued new clearance flight crew : declared emergency flight crew : landed in emergency condition other
Consequence	other
Supplementary
Problem Areas	Maintenance Human Performance Aircraft Company
Primary Problem	Aircraft

Narrative:

Lost system 'B' hydraulic pressure. System 'B' hydraulic quantity indicated 'full' while system 'a' quantity indicated 'empty.' accomplished abnormal procedure to lower flaps and leading edge devices. Declared emergency due to landing with 15 degrees flaps and alternate brakes and 1 reverser operating with standby hydraulic pressure. Landing uneventful on runway 28L. Alternate brakes were very sensitive and tended to grab. At gate, maintenance discovered cannon plugs to hydraulic quantity gauges were reversed. Cable length was supposed to make this impossible. Murphy's law strikes again.

Original NASA ASRS Text

Title: B737-300 CREW HAD 'B' SYS HYD FAILURE.

Narrative: LOST SYS 'B' HYD PRESSURE. SYS 'B' HYD QUANTITY INDICATED 'FULL' WHILE SYS 'A' QUANTITY INDICATED 'EMPTY.' ACCOMPLISHED ABNORMAL PROC TO LOWER FLAPS AND LEADING EDGE DEVICES. DECLARED EMER DUE TO LNDG WITH 15 DEGS FLAPS AND ALTERNATE BRAKES AND 1 REVERSER OPERATING WITH STANDBY HYD PRESSURE. LNDG UNEVENTFUL ON RWY 28L. ALTERNATE BRAKES WERE VERY SENSITIVE AND TENDED TO GRAB. AT GATE, MAINT DISCOVERED CANNON PLUGS TO HYD QUANTITY GAUGES WERE REVERSED. CABLE LENGTH WAS SUPPOSED TO MAKE THIS IMPOSSIBLE. MURPHY'S LAW STRIKES AGAIN.

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.