<< >> NASA ASRS Report 874710, February 2010

A B757-200's cabin altitude warning horn sounded when the cabin reached 12;000 ft while the aircraft cruised at FL380. An emergency descent was initiated and the cabin reached 14;000 ft.

Attributes
ACN	874710
Time
Date	201002
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Component
Aircraft Component	Pressurization Control System
Person 1
Function	Pilot Flying Captain
Person 2
Function	Pilot Flying First Officer
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

At FL380 cabin altitude alert went off. No status messages alerted other than cabin altitude.

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Original NASA ASRS Text

Title: A B757-200's Cabin Altitude Warning horn sounded when the cabin reached 12;000 FT while the aircraft cruised at FL380. An emergency descent was initiated and the cabin reached 14;000 FT.

Narrative: At FL380 cabin altitude alert went off. No status messages alerted other than cabin altitude.

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.