Loss of pressurization at 31000 ft. Emergency descent.

Attributes
ACN	190761
Time
Date	199110
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : jst
State Reference	PA
Altitude	msl bound lower : 31000 msl bound upper : 31000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zob
Operator	general aviation : corporate
Make Model Name	Medium Transport
Navigation In Use	Other
Flight Phase	cruise other descent other
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : commercial pilot : cfi
Experience	flight time last 90 days : 30 flight time total : 10000 flight time type : 500
ASRS Report	190761
Person 2
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa
Resolutory Action	flight crew : declared emergency none taken : anomaly accepted other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

Cruising at FL310 a rapid loss of cabin pressure was felt and observed on cabin pressure instrument along with a red cabin warning light and horn. A 7700 rapid descent was initiated to 10000. Flight proceeded normally from that point to destination. After parking a tear was found in cabin door seal. Believe this was the cause of pressurization problem.

Original NASA ASRS Text

Title: LOSS OF PRESSURIZATION AT 31000 FT. EMER DSCNT.

Narrative: CRUISING AT FL310 A RAPID LOSS OF CABIN PRESSURE WAS FELT AND OBSERVED ON CABIN PRESSURE INST ALONG WITH A RED CABIN WARNING LIGHT AND HORN. A 7700 RAPID DSCNT WAS INITIATED TO 10000. FLT PROCEEDED NORMALLY FROM THAT POINT TO DEST. AFTER PARKING A TEAR WAS FOUND IN CABIN DOOR SEAL. BELIEVE THIS WAS THE CAUSE OF PRESSURIZATION PROBLEM.

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.