Loss of cabin pressurization at cruise altitude of FL370.

Attributes
ACN	331003
Time
Date	199603
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : ood
State Reference	NJ
Altitude	msl bound lower : 37000 msl bound upper : 37000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zdc artcc : zdc
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 12000 flight time type : 3300
ASRS Report	331003
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : declared emergency flight crew : overcame equipment problem other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

At cruise (FL370) got 'left pack temperature' EICAS. Followed abnormal. Could not recover pack. Right pack would not hold cabin (approximately 300 FPM climb). Attempted manual control, no improvement. Started descent to FL240 at 4000+ FPM. Declared emergency and continued down to 10000 ft MSL with center's concurrence. Descended to 9000 ft and continued to ewr. Right pack continued to be unable to control cabin pressure. Landed ewr uneventfully.

Original NASA ASRS Text

Title: LOSS OF CABIN PRESSURIZATION AT CRUISE ALT OF FL370.

Narrative: AT CRUISE (FL370) GOT 'L PACK TEMP' EICAS. FOLLOWED ABNORMAL. COULD NOT RECOVER PACK. R PACK WOULD NOT HOLD CABIN (APPROX 300 FPM CLB). ATTEMPTED MANUAL CTL, NO IMPROVEMENT. STARTED DSCNT TO FL240 AT 4000+ FPM. DECLARED EMER AND CONTINUED DOWN TO 10000 FT MSL WITH CTR'S CONCURRENCE. DSNDED TO 9000 FT AND CONTINUED TO EWR. R PACK CONTINUED TO BE UNABLE TO CTL CABIN PRESSURE. LANDED EWR UNEVENTFULLY.

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.