B737-400 crew lost cabin pressurization in ZBW class a airspace.

Attributes
ACN	520470
Time
Date	200108
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : bdl.airport
State Reference	CT
Altitude	msl single value : 23000
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	artcc : zbw.artcc
Operator	common carrier : air carrier
Make Model Name	B737-400
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : multi engine pilot : instrument pilot : flight engineer pilot : commercial pilot : cfi pilot : atp
Experience	flight time last 90 days : 200 flight time total : 10000 flight time type : 3000
ASRS Report	520470
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : cabin altitude warning horn other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance controller : provided flight assist flight crew : declared emergency none taken : detected after the fact other
Consequence	other
Supplementary
Problem Areas	Flight Crew Human Performance Aircraft
Primary Problem	Aircraft

Narrative:

While climbing through FL230 cabin altitude aural warning horn sounded. Cabin was climbing through 10000. Standby system failed to automatically actuate. When selected, standby would not control cabin. During descent, cabin control was regained with manual dc system. Flight continued to destination at 9000 ft. During descent through 10000 ft MSL, first officer flying aircraft, captain talking with company. Cockpit duties split, aircraft speed at 290 KTS below 10000 ft approximately 3-4 mins, then corrected to 250 KTS.

Original NASA ASRS Text

Title: B737-400 CREW LOST CABIN PRESSURIZATION IN ZBW CLASS A AIRSPACE.

Narrative: WHILE CLBING THROUGH FL230 CABIN ALT AURAL WARNING HORN SOUNDED. CABIN WAS CLBING THROUGH 10000. STANDBY SYS FAILED TO AUTOMATICALLY ACTUATE. WHEN SELECTED, STANDBY WOULD NOT CTL CABIN. DURING DSCNT, CABIN CTL WAS REGAINED WITH MANUAL DC SYS. FLT CONTINUED TO DEST AT 9000 FT. DURING DSCNT THROUGH 10000 FT MSL, FO FLYING ACFT, CAPT TALKING WITH COMPANY. COCKPIT DUTIES SPLIT, ACFT SPD AT 290 KTS BELOW 10000 FT APPROX 3-4 MINS, THEN CORRECTED TO 250 KTS.

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.