An sf-340 suffered a complete loss of the main hydraulic system and pressure due to a failed hydraul...

Attributes
ACN	924518
Time
Date	201012
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	Saab 340 Undifferentiated
Operating Under FAR Part	Part 121
Flight Phase	Landing
Flight Plan	IFR
Component
Aircraft Component	Hydraulic Main System
Person 1
Function	First Officer Pilot Flying
Qualification	Flight Crew Commercial
Experience	Flight Crew Last 90 Days 4 Flight Crew Total 4500 Flight Crew Type 2300
Person 2
Function	Pilot Not Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 44 Flight Crew Total 5000 Flight Crew Type 4000
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

The first officer was flying the approach and the captain was pilot not flying. When the gear was selected down almost immediately the hydraulic look down light illuminated and the pump was switched off per the memory items. The main accumulator and hydraulic quantity both read zero. The gear indicated down and locked at this point. The emergency checklist was followed and we declared an emergency with the tower. We then pre-coded with the landing and stopped the aircraft on the runway. Crash fire rescue equipment was waiting and informed us of a leak around the nosewheel. We informed the tower we would need to be towed to the gate. We spoke to dispatch; operations and maintenance. We were then towed to the gate for a normal deplaning. We determined a hydraulic line in the nose gear bay ruptured when the landing gear was selected down and we lost all main hydraulic pressure. After landing the ramp personnel arrived at the aircraft to tow us to the gate without chocks and without a working headset. They could hear us but we could not hear them.

Original NASA ASRS Text

Title: An SF-340 suffered a complete loss of the main hydraulic system and pressure due to a failed hydraulic line. The flight crew landed safely and the aircraft towed to the gate where ground personnel failed to have wheel chocks available to secure the aircraft from ground movement.

Narrative: The First Officer was flying the approach and the Captain was pilot not flying. When the gear was selected down almost immediately the hydraulic look down light illuminated and the pump was switched off per the memory items. The main accumulator and hydraulic quantity both read zero. The gear indicated down and locked at this point. The emergency checklist was followed and we declared an emergency with the Tower. We then pre-coded with the landing and stopped the aircraft on the runway. CFR was waiting and informed us of a leak around the nosewheel. We informed the Tower we would need to be towed to the gate. We spoke to Dispatch; Operations and Maintenance. We were then towed to the gate for a normal deplaning. We determined a hydraulic line in the nose gear bay ruptured when the landing gear was selected down and we lost all main hydraulic pressure. After landing the ramp personnel arrived at the aircraft to tow us to the gate without chocks and without a working headset. They could hear us but we could not hear them.

Data retrieved from NASA's ASRS site as of April 2012 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.

An sf-340 suffered a complete loss of the main hydraulic system and pressure due to a failed hydraulic line. The flight crew landed safely and the aircraft towed to the gate where ground personnel failed to have wheel chocks available to secure the aircraft from ground movement.