An A320 green hydraulic system fluid quantity decreased to zero in flight. An emergency was declared...

Narrative:

At cruise; we got a green hydraulic system low level ECAM. System quantity was virtually zero. Complied with ECAM and flight manual procedures to isolate system. This failure would affect landing in that we would not have our primary brake system or nosewheel steering. Additionally; we would only have 1 thrust reverser. Coordinated with dispatch and maintenance; then declared an emergency with center. We informed center that we would need runway 28 (one of the active landing runways) at ZZZ due to its length. Began our landing configuration about 30 miles from ZZZ because we were unsure just how long the flaps would take and to gravity-extend the landing gear. All ATC facilities were great in their handling of our aircraft. Landed runway 28 and were able to turn off at taxiway with differential braking. Configured for tow-in and shutdown. We were then towed to the gate.

Original NASA ASRS Text

Title: An A320 Green Hydraulic system fluid quantity decreased to zero in flight. An emergency was declared followed by a manual gear extension; and a backup brakes no steering landing. The aircraft was towed to the gate.

Narrative: At cruise; we got a Green Hydraulic System Low Level ECAM. System quantity was virtually zero. Complied with ECAM and Flight Manual procedures to isolate system. This failure would affect landing in that we would not have our primary brake system or nosewheel steering. Additionally; we would only have 1 thrust reverser. Coordinated with Dispatch and Maintenance; then declared an emergency with Center. We informed Center that we would need Runway 28 (one of the active landing runways) at ZZZ due to its length. Began our landing configuration about 30 miles from ZZZ because we were unsure just how long the flaps would take and to gravity-extend the landing gear. All ATC facilities were great in their handling of our aircraft. Landed Runway 28 and were able to turn off at taxiway with differential braking. Configured for tow-in and shutdown. We were then towed to the gate.

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.

Attributes
ACN	824226
Time
Date	200902
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	A320
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Component
Aircraft Component	Hydraulic Main System
Person 1
Function	First Officer Pilot Not Flying
Experience	Flight Crew Last 90 Days 230 Flight Crew Total 7500 Flight Crew Type 4000
Person 2
Function	Captain Pilot Flying
Experience	Flight Crew Last 90 Days 220 Flight Crew Total 12320 Flight Crew Type 4300
Events
Anomaly	Aircraft Equipment Problem Critical

An A320 green hydraulic system fluid quantity decreased to zero in flight. An emergency was declared followed by a manual gear extension; and a backup brakes no steering landing. The aircraft was towed to the gate.