Narrative:

I worked the MEL for the automatic mode being inoperative on the pressure controller. I replaced the controller with a new one. I did not remember to consult the MEL manual to see what maintenance procedures had been taken to MEL the controller by a previous station. The outflow valve hoses had been disconnected. The aircraft landed and could not depressurize through 'automatic' mode. This generated a call to maintenance. This is all the information available to me at this time involving this incident.

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Original NASA ASRS Text

Title: AN EMB140 ARRIVED WITH THE PRESSURIZATION SYS DEFERRED AS INOP IN 'AUTO.' RPTR REPLACED PRESSURE CONTROLLER AND CLRED DEFERRED ITEM.

Narrative: I WORKED THE MEL FOR THE AUTO MODE BEING INOP ON THE PRESSURE CONTROLLER. I REPLACED THE CONTROLLER WITH A NEW ONE. I DID NOT REMEMBER TO CONSULT THE MEL MANUAL TO SEE WHAT MAINT PROCS HAD BEEN TAKEN TO MEL THE CONTROLLER BY A PREVIOUS STATION. THE OUTFLOW VALVE HOSES HAD BEEN DISCONNECTED. THE ACFT LANDED AND COULD NOT DEPRESSURIZE THROUGH 'AUTO' MODE. THIS GENERATED A CALL TO MAINT. THIS IS ALL THE INFO AVAILABLE TO ME AT THIS TIME INVOLVING THIS INCIDENT.

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.