SF340 captain experiences a hydraulic pump failure while taxiing for takeoff; resulting in loss of s...

Narrative:

Taxing north on taxiway hotel the hydr light flashed on followed by a struggling sound from our hydraulic pump. Shortly there after the hydraulic pump went silent. Almost instantly we lost steering and braking. We put the hydraulic pump to override and nothing. At this point the aircraft was moving slowly to the left of the centerline towards the taxiway edge. With reverse thrust I was almost able to bring the aircraft to a complete stop. I immediately shut down the engines going straight to fuel off and the aircraft rolled about 6 ft off the edge of the taxiway. The flight attendant was notified of the situation and operations were called. Airport operations quickly had a bus to take our passengers back to the terminal. We were towed back to the gate. There was no aircraft damage and no complaints from passengers.

Original NASA ASRS Text

Title: SF340 Captain experiences a hydraulic pump failure while taxiing for takeoff; resulting in loss of steering and braking. Reverse thrust is used and the engines are shut down and the aircraft departs the taxiway a short distance before coming to a stop.

Narrative: Taxing north on taxiway hotel the HYDR light flashed on followed by a struggling sound from our hydraulic pump. Shortly there after the hydraulic pump went silent. Almost instantly we lost steering and braking. We put the hydraulic pump to override and nothing. At this point the aircraft was moving slowly to the left of the centerline towards the taxiway edge. With reverse thrust I was almost able to bring the aircraft to a complete stop. I immediately shut down the engines going straight to fuel off and the aircraft rolled about 6 FT off the edge of the taxiway. The Flight Attendant was notified of the situation and operations were called. Airport operations quickly had a bus to take our passengers back to the terminal. We were towed back to the gate. There was no aircraft damage and no complaints from passengers.

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.

Attributes
ACN	1119777
Time
Date	201310
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	SF 340B
Operating Under FAR Part	Part 121
Flight Phase	Taxi
Component
Aircraft Component	Hydraulic System Pump
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Critical Ground Excursion Taxiway

SF340 captain experiences a hydraulic pump failure while taxiing for takeoff; resulting in loss of steering and braking. Reverse thrust is used and the engines are shut down and the aircraft departs the taxiway a short distance before coming to a stop.