Narrative:

We had flown a 2 hour flight just prior to this flight. Prior to this flight; we had a min layover after flying from four hours during the day from the west coast to the east coast. Upon arrival at our first destination; we were scheduled for a day room tor 5 hours but stayed at the airport so that we could leave 2 hours earlier than scheduled. Our airplane had four MEL items. Two were reinspections each flight; one was a fadec issue and the other pitch feel deferral. We had to de-ice prior to engine start. During the week all de-ice events were done after engine start. We took off at max thrust. During climbout; passing about 25000 feet MSL; we experienced a dual pack failure. We placed our oxygen masks on; established communication between ourselves; then began to coordinate a descent to 10;000 ft with ATC and started going through our ECAM procedures. We descended to 10;000 feet. We contacted flight control and established contact with maintenance control. We determined; with flight control; we could make it to our destination at 10;000 feet with the fuel we had on board. As we were going through the ECAM procedures and attempting to reset the packs as per maintenance direction; we realized that our APU was on and the APU bleed valve was open. We turned the APU off and closed the APU bleed valve. We were then able to reset the AC packs. We climbed to FL360 and continued uneventfully. Leaving the APU and APU bleed on were not returned to their proper position after we de-iced. This was the cause of our dual pack failure. Fatigue; failure to utilize checklist discipline; change in de-icing procedure and MEL reinspections were all contributing factors in this event.

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Original NASA ASRS Text

Title: A300 flight crew reported experiencing a dual pack failure necessitating an emergency descent. After troubleshooting; the crew discovered the source of the failure and was able to climb back to the planned cruise altitude.

Narrative: We had flown a 2 hour flight just prior to this flight. Prior to this flight; we had a min layover after flying from four hours during the day from the west coast to the East coast. Upon arrival at our first destination; we were scheduled for a day room tor 5 hours but stayed at the airport so that we could leave 2 hours earlier than scheduled. Our airplane had four MEL items. Two were reinspections each flight; one was a FADEC issue and the other pitch feel deferral. We had to de-ice prior to engine start. During the week all de-ice events were done after engine start. We took off at max thrust. During climbout; passing about 25000 feet MSL; we experienced a dual pack failure. We placed our oxygen masks on; established communication between ourselves; then began to coordinate a descent to 10;000 ft with ATC and started going through our ECAM procedures. We descended to 10;000 feet. We contacted flight control and established contact with maintenance control. We determined; with flight control; we could make it to our destination at 10;000 feet with the fuel we had on board. As we were going through the ECAM procedures and attempting to reset the packs as per Maintenance direction; we realized that our APU was on and the APU bleed valve was open. We turned the APU off and closed the APU bleed valve. We were then able to reset the AC packs. We climbed to FL360 and continued uneventfully. Leaving the APU and APU bleed on were not returned to their proper position after we de-iced. This was the cause of our dual pack failure. Fatigue; failure to utilize checklist discipline; change in de-icing procedure and MEL reinspections were all contributing factors in this event.

Data retrieved from NASA's ASRS site 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.