Cabin pressurization loss.

Attributes
ACN	472689
Time
Date	200005
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : zny.artcc
State Reference	NY
Altitude	msl single value : 29000
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zny.artcc
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : atp pilot : multi engine pilot : instrument pilot : commercial
Experience	flight time last 90 days : 200 flight time total : 14000 flight time type : 8000
ASRS Report	472689
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : cab alt warning other flight crewa
Resolutory Action	controller : issued new clearance flight crew : declared emergency flight crew : diverted to another airport
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

Several mins after leveloff at FL290, the altitude warning alarm sounded. Cabin altitude was above 10000 ft and climbing at about 500 FPM. An emergency was declared and the aircraft descended to 10000 ft, then 8000 ft. Oxygen masks were donned by the cockpit crew and all emergency procedures per the QRH were complied with. Passenger oxygen masks never deployed as the maximum cabin altitude only reached about 12000 ft. An uneventful landing was made at bdl and no passenger mentioned any adverse affects.

Original NASA ASRS Text

Title: CABIN PRESSURIZATION LOSS.

Narrative: SEVERAL MINS AFTER LEVELOFF AT FL290, THE ALT WARNING ALARM SOUNDED. CABIN ALT WAS ABOVE 10000 FT AND CLBING AT ABOUT 500 FPM. AN EMER WAS DECLARED AND THE ACFT DSNDED TO 10000 FT, THEN 8000 FT. OXYGEN MASKS WERE DONNED BY THE COCKPIT CREW AND ALL EMER PROCS PER THE QRH WERE COMPLIED WITH. PAX OXYGEN MASKS NEVER DEPLOYED AS THE MAXIMUM CABIN ALT ONLY REACHED ABOUT 12000 FT. AN UNEVENTFUL LNDG WAS MADE AT BDL AND NO PAX MENTIONED ANY ADVERSE AFFECTS.

Data retrieved from NASA's ASRS site as of July 2007 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.