Medium large transport has loss of pressurization caused by faulty temperature sensor.

Attributes
ACN	317217
Time
Date	199510
Day	Mon
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : gso
State Reference	NC
Altitude	msl bound lower : 0 msl bound upper : 33000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zjx
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	cruise other descent other other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : flight engineer pilot : cfi pilot : atp pilot : commercial
Experience	flight time last 90 days : 150 flight time total : 11000 flight time type : 300
ASRS Report	317217
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
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:

Faulty temperature sensor caused both air conditioning/pressurization system to thermally shut down. Problem may have been aggravated by operator manipulation of system without the knowledge that temperature sensor was faulty. Caused loss of cabin pressurization control forcing emergency descent and declaration of an emergency. Passenger oxygen used. No injuries. Landed gso.

Original NASA ASRS Text

Title: MLG HAS LOSS OF PRESSURIZATION CAUSED BY FAULTY TEMP SENSOR.

Narrative: FAULTY TEMP SENSOR CAUSED BOTH AIR CONDITIONING/PRESSURIZATION SYS TO THERMALLY SHUT DOWN. PROB MAY HAVE BEEN AGGRAVATED BY OPERATOR MANIPULATION OF SYS WITHOUT THE KNOWLEDGE THAT TEMP SENSOR WAS FAULTY. CAUSED LOSS OF CABIN PRESSURIZATION CTL FORCING EMER DSCNT AND DECLARATION OF AN EMER. PAX OXYGEN USED. NO INJURIES. LANDED GSO.

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.