B757 first officer experiences a cabin altitude EICAS warning message at FL400. An emergency is decl...

Attributes
ACN	1072140
Time
Date	201303
Place
Locale Reference	ZZZZ.ARTCC
State Reference	FO
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Component
Aircraft Component	Pressurization System
Person 1
Function	First Officer Pilot Flying
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

We got a cabin altitude EICAS warning message at FL400 and executed an emergency descent to 10;000 ft per QRH; declared emergency and diverted. Upon initial descent we turned off course 30 degrees and informed ATC of the deviation. Once settled and stable at 10;000 ft we completed appropriate checklists and completed the diversion with no further events.

Original NASA ASRS Text

Title: B757 First Officer experiences a Cabin Altitude EICAS warning message at FL400. An emergency is declared; descent initiated; and a diversion to a suitable airport is planned.

Narrative: We got a Cabin Altitude EICAS warning message at FL400 and executed an emergency descent to 10;000 FT per QRH; declared emergency and diverted. Upon initial descent we turned off course 30 degrees and informed ATC of the deviation. Once settled and stable at 10;000 FT we completed appropriate checklists and completed the diversion with no further events.

Data retrieved from NASA's ASRS site as of July 2013 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.

B757 first officer experiences a cabin altitude EICAS warning message at FL400. An emergency is declared; descent initiated; and a diversion to a suitable airport is planned.