Loss of cabin pressure in air carrier light transport.

Attributes
ACN	246422
Time
Date	199307
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : abb
State Reference	IN
Altitude	msl bound lower : 10000 msl bound upper : 27000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zid
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Navigation In Use	Other Other
Flight Phase	cruise other descent other other
Route In Use	enroute : direct enroute : on vectors enroute airway : zid
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 4150 flight time type : 1680
ASRS Report	246422
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa
Resolutory Action	controller : issued new clearance flight crew : exited adverse environment
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

During descent from 27000 ft to 21000 ft cabin pressure increased to 10000 ft. Checklist was called for and manual pressure was applied. Could not regain control of pressure. Oxygen masks were donned, passenger oxygen masks were released automatically. Center was advised we needed a descent to 10000 ft. After a 30 degree turn we were cleared to 10000 ft. After rapid descent we leveled off at 10000 ft. Then we were cleared on course direct to abb and cvg. Once stabilized in cruise at 10000 ft, all the passenger and crew were checked to be well, we continued flight to cvg with no further incident. No special assistance was required at cvg.

Original NASA ASRS Text

Title: LOSS OF CABIN PRESSURE IN ACR LTT.

Narrative: DURING DSCNT FROM 27000 FT TO 21000 FT CABIN PRESSURE INCREASED TO 10000 FT. CHKLIST WAS CALLED FOR AND MANUAL PRESSURE WAS APPLIED. COULD NOT REGAIN CTL OF PRESSURE. OXYGEN MASKS WERE DONNED, PAX OXYGEN MASKS WERE RELEASED AUTOMATICALLY. CTR WAS ADVISED WE NEEDED A DSCNT TO 10000 FT. AFTER A 30 DEG TURN WE WERE CLRED TO 10000 FT. AFTER RAPID DSCNT WE LEVELED OFF AT 10000 FT. THEN WE WERE CLRED ON COURSE DIRECT TO ABB AND CVG. ONCE STABILIZED IN CRUISE AT 10000 FT, ALL THE PAX AND CREW WERE CHKED TO BE WELL, WE CONTINUED FLT TO CVG WITH NO FURTHER INCIDENT. NO SPECIAL ASSISTANCE WAS REQUIRED AT CVG.

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.