Narrative:

Cruising FL250; single pack operation. Remaining pack tripped off. Cabin started climbing. Accomplished emergency descent; diverted to ZZZ; landed uneventfully.

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Original NASA ASRS Text

Title: Dispatched with an inoperative pack; an MD80 suffered loss of pressurization when the other pack packed it in.

Narrative: Cruising FL250; single pack operation. Remaining pack tripped off. Cabin started climbing. Accomplished emergency descent; diverted to ZZZ; landed uneventfully.

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.