<< >> NASA ASRS Report 1111038, August 2013

A B737-800 'B' hydraulic system alerted low quantity and pressure descending through 8;000 ft on approach so an emergency was declared; the QRH completed and an uneventful landing followed.

Attributes
ACN	1111038
Time
Date	201308
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	B737-800
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Component
Aircraft Component	Hydraulic Main System
Person 1
Function	Pilot Flying First Officer
Person 2
Function	Captain Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

Loss of system B hydraulics on arrival descending through 8;000 ft we experienced a complete loss of system B hydraulics (pressure and quantity). A master caution alert notified us of the condition which occurred when flaps were selected to 1 degree. We notified ATC immediately; declared an emergency and requested arff. We then proceeded to complete the QRH procedure checklist 'loss of system B'.

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Original NASA ASRS Text

Title: A B737-800 'B' Hydraulic System alerted LOW QUANTITY and PRESSURE descending through 8;000 FT on approach so an emergency was declared; the QRH completed and an uneventful landing followed.

Narrative: Loss of System B Hydraulics On arrival descending through 8;000 FT we experienced a complete loss of System B hydraulics (pressure and quantity). A Master Caution Alert notified us of the condition which occurred when Flaps were selected to 1 degree. We notified ATC immediately; declared an emergency and requested ARFF. We then proceeded to complete the QRH procedure checklist 'Loss of System B'.

Data retrieved from NASA's ASRS site as of July 2013 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.