Narrative:

Two highly experienced pilots on second leg of a 5-leg day. Had just done an aircraft swap for a 15 minute flight in marginal weather conditions. Pushed back from gate and de-iced. Just as we were starting our first engine; ATC advised us of a 15 minute delay awaiting the arrival of an inbound aircraft (non-radar environment). We elected to use our company's single engine taxi-out procedure. Almost immediately; ATC advised that there would be no delay if we 'keep things moving.' started second engine; taxied; and departed. As soon as we were airborne; my ears told me something might be amiss with the cabin pressurization. Sure enough; some pressurization panel switches were not in the normal positions. Corrected and continued.first time with a 5-leg day in years. (Have been flying mostly turns). First time to de-ice this season. First time to use revised de-icing procedures. First time for me to fly in a high workload; non-radar area of our route system in a couple of years. First time for me to use single engine taxi-out procedure in at least a year. As a crew; we had discussed these issues and how the 'swiss cheese holes could line up'. Bottom line was we allowed interruptions; changes of plans; and a desire to 'keep the operation moving' to get in the way of not completely finishing the after start flow and checklist. We even talked about a 'safety pause'; but obviously didn't pause enough.

Google
 

Original NASA ASRS Text

Title: A B737 crew took off unpressurized because they were rushed to takeoff after de-icing; planning a single engine taxi; and then were suddenly released for takeoff before they were ready.

Narrative: Two highly experienced pilots on second leg of a 5-leg day. Had just done an aircraft swap for a 15 minute flight in marginal weather conditions. Pushed back from gate and de-iced. Just as we were starting our first engine; ATC advised us of a 15 minute delay awaiting the arrival of an inbound aircraft (non-radar environment). We elected to use our company's single engine taxi-out procedure. Almost immediately; ATC advised that there would be no delay if we 'keep things moving.' Started second engine; taxied; and departed. As soon as we were airborne; my ears told me something might be amiss with the cabin pressurization. Sure enough; some pressurization panel switches were not in the normal positions. Corrected and continued.First time with a 5-leg day in years. (Have been flying mostly turns). First time to de-ice this season. First time to use revised de-icing procedures. First time for me to fly in a high workload; non-radar area of our route system in a couple of years. First time for me to use single engine taxi-out procedure in at least a year. As a crew; we had discussed these issues and how the 'Swiss cheese holes could line up'. Bottom line was we allowed interruptions; changes of plans; and a desire to 'keep the operation moving' to get in the way of not completely finishing the after start flow and checklist. We even talked about a 'safety pause'; but obviously didn't pause enough.

Data retrieved from NASA's ASRS site as of July 2013 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.