Large transport made emergency descent when cabin pressurization system failed.

Attributes
ACN	84628
Time
Date	198803
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : okc
State Reference	OK
Altitude	msl bound lower : 29000 msl bound upper : 29000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zfw
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	climbout : intermediate altitude descent other other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : second officer
Qualification	pilot : cfi pilot : instrument pilot : commercial pilot : flight engineer
Experience	flight time last 90 days : 160 flight time total : 3165 flight time type : 300
ASRS Report	84628
Person 2
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : declared emergency other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

Flight from ict to dfw experienced a loss of pressurization while climbing through FL290. An emergency descent was accomplished as well as all pertinent checklists and an uneventful landing was made at okc. Cabin altitude at the time of the occurrence was about 5500' and reached a maximum of 15000'. Apparent cause may have been an aft cargo door seal that failed.

Original NASA ASRS Text

Title: LGT MADE EMERGENCY DESCENT WHEN CABIN PRESSURIZATION SYSTEM FAILED.

Narrative: FLT FROM ICT TO DFW EXPERIENCED A LOSS OF PRESSURIZATION WHILE CLBING THROUGH FL290. AN EMER DSCNT WAS ACCOMPLISHED AS WELL AS ALL PERTINENT CHKLISTS AND AN UNEVENTFUL LNDG WAS MADE AT OKC. CABIN ALT AT THE TIME OF THE OCCURRENCE WAS ABOUT 5500' AND REACHED A MAX OF 15000'. APPARENT CAUSE MAY HAVE BEEN AN AFT CARGO DOOR SEAL THAT FAILED.

Data retrieved from NASA's ASRS site as of August 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.