An air carrier medium large transport made an emergency descent after a slow loss of pressurization.

Attributes
ACN	243501
Time
Date	199306
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : fam
State Reference	MO
Altitude	msl bound lower : 10000 msl bound upper : 31000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zkc artcc : zbw
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other descent other other
Route In Use	enroute airway : zkc
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : commercial
Experience	flight time last 90 days : 150 flight time total : 8000 flight time type : 5500
ASRS Report	243501
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 18060 flight time type : 11050
ASRS Report	243770
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	controller : issued new clearance flight crew : declared emergency flight crew : exited adverse environment flight crew : overcame equipment problem
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

Emergency was declared at specified point due to high indicated cabin altitude at cruise flight, cabin pressure caution light illuminated and oxygen masks were automatic deployed. Emergency checklist and descent was established by crew according to cockpit operating manual. Descended with clearance from center to 10000 ft, cabin altitude reduced to normal. Continued flight at 10000 ft, normal landing in memphis. Upon landing pressurization problem written up in maintenance logbook.

Original NASA ASRS Text

Title: AN ACR MLG MADE AN EMER DSCNT AFTER A SLOW LOSS OF PRESSURIZATION.

Narrative: EMER WAS DECLARED AT SPECIFIED POINT DUE TO HIGH INDICATED CABIN ALT AT CRUISE FLT, CABIN PRESSURE CAUTION LIGHT ILLUMINATED AND OXYGEN MASKS WERE AUTO DEPLOYED. EMER CHKLIST AND DSCNT WAS ESTABLISHED BY CREW ACCORDING TO COCKPIT OPERATING MANUAL. DSNDED WITH CLRNC FROM CTR TO 10000 FT, CABIN ALT REDUCED TO NORMAL. CONTINUED FLT AT 10000 FT, NORMAL LNDG IN MEMPHIS. UPON LNDG PRESSURIZATION PROB WRITTEN UP IN MAINT LOGBOOK.

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.