Pressurization system failed.

Attributes
ACN	92030
Time
Date	198808
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : pdx
State Reference	OR
Altitude	msl bound lower : 0 msl bound upper : 10000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zse
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : commercial pilot : instrument
Experience	flight time last 90 days : 200 flight time total : 6000 flight time type : 200
ASRS Report	92030
Person 2
Function	controller : radar
Qualification	controller : radar
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	other flight crewa
Resolutory Action	flight crew : overcame equipment problem
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Lost pressurization on a flight from kpdx to kgeg. Had to maintain 10000' for the entire flight. Callback conversation with reporter revealed the following: on arrival pdx, a high differential duct pressure was written up. Maintenance determined that the right pack was at fault. It was rendered inoperative and MEL'd. On takeoff it was discovered that the left pack was inoperative. No pressurization was available and climb was stopped at 10000'.

Original NASA ASRS Text

Title: PRESSURIZATION SYSTEM FAILED.

Narrative: LOST PRESSURIZATION ON A FLT FROM KPDX TO KGEG. HAD TO MAINTAIN 10000' FOR THE ENTIRE FLT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING: ON ARR PDX, A HIGH DIFFERENTIAL DUCT PRESSURE WAS WRITTEN UP. MAINT DETERMINED THAT THE RIGHT PACK WAS AT FAULT. IT WAS RENDERED INOP AND MEL'D. ON TKOF IT WAS DISCOVERED THAT THE LEFT PACK WAS INOP. NO PRESSURIZATION WAS AVAILABLE AND CLB WAS STOPPED AT 10000'.

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.