Carj make an emergency descent following loss of cabin pressure.

Attributes
ACN	696588
Time
Date	200605
Local Time Of Day	0001 To 0600
Place
Locale Reference	atc facility : zzz.artcc
State Reference	US
Altitude	msl single value : 34000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zzz.artcc
Operator	common carrier : air carrier
Make Model Name	Regional Jet 700 ER&LR
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Experience	flight time last 90 days : 80 flight time total : 4000 flight time type : 1200
ASRS Report	696588
Person 2
Affiliation	company : air carrier
Function	oversight : pic
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : cabin alt master caution
Resolutory Action	flight crew : declared emergency flight crew : exited adverse environment
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

We were flying from ZZZ1 to ZZZ2 at FL340. During cruise we got cabin altitude master caution. Cabin altitude was climbing. The captain and I both went on oxygen and requested clearance for a lower altitude due to a cabin pressure problem. ATC initially cleared us to FL270 then vectored us 20 degrees to the left and cleared us to FL180. We requested 10000 ft and the captain declared an emergency. After we were clear of traffic and were still descending to FL180; ATC cleared us to 10000 ft. The flight attendant was notified of the situation and a passenger announcement was made once we were at 10000 ft.

Original NASA ASRS Text

Title: CARJ MAKE AN EMER DSCNT FOLLOWING LOSS OF CABIN PRESSURE.

Narrative: WE WERE FLYING FROM ZZZ1 TO ZZZ2 AT FL340. DURING CRUISE WE GOT CABIN ALT MASTER CAUTION. CABIN ALT WAS CLBING. THE CAPT AND I BOTH WENT ON OXYGEN AND REQUESTED CLRNC FOR A LOWER ALT DUE TO A CABIN PRESSURE PROB. ATC INITIALLY CLRED US TO FL270 THEN VECTORED US 20 DEGS TO THE L AND CLRED US TO FL180. WE REQUESTED 10000 FT AND THE CAPT DECLARED AN EMER. AFTER WE WERE CLR OF TFC AND WERE STILL DSNDING TO FL180; ATC CLRED US TO 10000 FT. THE FLT ATTENDANT WAS NOTIFIED OF THE SITUATION AND A PAX ANNOUNCEMENT WAS MADE ONCE WE WERE AT 10000 FT.

Data retrieved from NASA's ASRS site as of January 2009 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.