<< >> NASA ASRS Report 861421, November 2009

An A320 flight crew departed with a pack deferred inop and lost the second one enroute when it overheated. The executed an emergency descent and regained control of the pack when it cooled; allowing them to continue to destination.

Attributes
ACN	861421
Time
Date	200911
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	A320
Operating Under FAR Part	Part 121
Flight Phase	Takeoff
Component
Aircraft Component	Air Conditioning and Pressurization Pack
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 260 Flight Crew Total 12000 Flight Crew Type 5000
Person 2
Function	Pilot Not Flying First Officer
Experience	Flight Crew Last 90 Days 250 Flight Crew Total 12000 Flight Crew Type 4500
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

We departed with pack 2 deferred inop. At FL310 got pack 1 fault due to overheat. We put on oxygen mask; established communication; declared emergency; requested 10;000ft and began high dive. During dive we referenced qrc and at FL180 pack temp went back to normal. We reset pack and continued to destination at 10000ft. We notified flight attendants; dispatch; and maintenance. Cabin altitude peaked at 7200ft.

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Original NASA ASRS Text

Title: An A320 Flight Crew departed with a pack deferred inop and lost the second one enroute when it overheated. The executed an emergency descent and regained control of the pack when it cooled; allowing them to continue to destination.

Narrative: We departed with pack 2 deferred inop. At FL310 got pack 1 fault due to overheat. We put on oxygen mask; established communication; declared emergency; requested 10;000ft and began high dive. During dive we referenced QRC and at FL180 pack temp went back to normal. We reset pack and continued to destination at 10000ft. We notified Flight Attendants; Dispatch; and Maintenance. Cabin altitude peaked at 7200ft.

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.