EMB145 flight crew is unable to pressurize during climb.

Attributes
ACN	718257
Time
Date	200611
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	msl single value : 3000
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	EMB ERJ 145 ER&LR
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	718257
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	aircraft equipment other aircraft equipment : cabin alt indicator other flight crewa other flight crewb
Resolutory Action	flight crew : overcame equipment problem
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

Event occurred because automatic pressurization was deferred. The automatic pressurization was MEL'ed; so we had to use manual. On climb out we did as the MEL stated for the manual mode of pressurization. The cabin kept climbing and would not descend. We did everything as stated and the cabin kept climbing. We stopped the climb at 9000 ft and ACARS dispatch to find the new fuel burn for flying to stl at 9000 ft. The fuel burn was good and we continued without any problems. Airplane would not pressurize on climb out. When we noticed the cabin was not pressurizing; we stopped the climb and ACARS the company to get a new fuel burn for 9000 ft. Have a better explanation in the MEL.

Original NASA ASRS Text

Title: EMB145 FLT CREW IS UNABLE TO PRESSURIZE DURING CLB.

Narrative: EVENT OCCURRED BECAUSE AUTO PRESSURIZATION WAS DEFERRED. THE AUTO PRESSURIZATION WAS MEL'ED; SO WE HAD TO USE MANUAL. ON CLBOUT WE DID AS THE MEL STATED FOR THE MANUAL MODE OF PRESSURIZATION. THE CABIN KEPT CLBING AND WOULD NOT DSND. WE DID EVERYTHING AS STATED AND THE CABIN KEPT CLBING. WE STOPPED THE CLB AT 9000 FT AND ACARS DISPATCH TO FIND THE NEW FUEL BURN FOR FLYING TO STL AT 9000 FT. THE FUEL BURN WAS GOOD AND WE CONTINUED WITHOUT ANY PROBS. AIRPLANE WOULD NOT PRESSURIZE ON CLBOUT. WHEN WE NOTICED THE CABIN WAS NOT PRESSURIZING; WE STOPPED THE CLB AND ACARS THE COMPANY TO GET A NEW FUEL BURN FOR 9000 FT. HAVE A BETTER EXPLANATION IN THE MEL.

Data retrieved from NASA's ASRS site as of January 2009 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.