Narrative:

On takeoff roll just prior to V1 an air conditioning pack overheated (pack trip). We continued the takeoff and shortly after becoming airborne the remaining pack overheated (2ND pack trip). We were now climbing unpressurized. Aircraft has only 2 packs. The captain was trying to reset a pack but couldn't find the reset button (the pneumatic panel is located above the first officer head). At this time, I reached up and reset the packs. A few seconds later it tripped again, and we were once again unpressurized. Now both of us were preoccupied with the pressurization problem. As a result we exceeded the srp 4 DME crossing restriction. At the arp 1 DME the drake 4 SID calls for a left turn to a 030 degree heading for vectors to the srp 330 degree right. I turned left to 030 degree heading and intercepted the right. The controller caught our error and told us that we should have maintained the 030 degree heading. To the best of my knowledge there was no conflict. I am 90 percent to blame for his deviation. I should have concentrated on flying the airplane, and let the captain work the problem. However, the manual allows for one reset of the packs but the captain kept on resetting the packs several times until they finally stayed on. The OAT at phx was 81 degree F so it was obvious that the packs were overheating because of another problem (later found to be a bird caught in the heat exchanger from an earlier flight) and we would have returned to phx. Secondly the controller could have told us that he intended for us to remain on the 030 degree and fly through the 330 degree right as they do when they fly you through the localizer.

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Original NASA ASRS Text

Title: ACR MLG ALT DEVIATION OVERSHOT CROSSING RESTRICTION AND TRACK DEVIATION DURING SID FROM PHX.

Narrative: ON TKOF ROLL JUST PRIOR TO V1 AN AIR CONDITIONING PACK OVERHEATED (PACK TRIP). WE CONTINUED THE TKOF AND SHORTLY AFTER BECOMING AIRBORNE THE REMAINING PACK OVERHEATED (2ND PACK TRIP). WE WERE NOW CLBING UNPRESSURIZED. ACFT HAS ONLY 2 PACKS. THE CAPT WAS TRYING TO RESET A PACK BUT COULDN'T FIND THE RESET BUTTON (THE PNEUMATIC PANEL IS LOCATED ABOVE THE F/O HEAD). AT THIS TIME, I REACHED UP AND RESET THE PACKS. A FEW SECS LATER IT TRIPPED AGAIN, AND WE WERE ONCE AGAIN UNPRESSURIZED. NOW BOTH OF US WERE PREOCCUPIED WITH THE PRESSURIZATION PROB. AS A RESULT WE EXCEEDED THE SRP 4 DME XING RESTRICTION. AT THE ARP 1 DME THE DRAKE 4 SID CALLS FOR A L TURN TO A 030 DEG HDG FOR VECTORS TO THE SRP 330 DEG R. I TURNED L TO 030 DEG HDG AND INTERCEPTED THE R. THE CTLR CAUGHT OUR ERROR AND TOLD US THAT WE SHOULD HAVE MAINTAINED THE 030 DEG HDG. TO THE BEST OF MY KNOWLEDGE THERE WAS NO CONFLICT. I AM 90 PERCENT TO BLAME FOR HIS DEV. I SHOULD HAVE CONCENTRATED ON FLYING THE AIRPLANE, AND LET THE CAPT WORK THE PROB. HOWEVER, THE MANUAL ALLOWS FOR ONE RESET OF THE PACKS BUT THE CAPT KEPT ON RESETTING THE PACKS SEVERAL TIMES UNTIL THEY FINALLY STAYED ON. THE OAT AT PHX WAS 81 DEG F SO IT WAS OBVIOUS THAT THE PACKS WERE OVERHEATING BECAUSE OF ANOTHER PROB (LATER FOUND TO BE A BIRD CAUGHT IN THE HEAT EXCHANGER FROM AN EARLIER FLT) AND WE WOULD HAVE RETURNED TO PHX. SECONDLY THE CTLR COULD HAVE TOLD US THAT HE INTENDED FOR US TO REMAIN ON THE 030 DEG AND FLY THROUGH THE 330 DEG R AS THEY DO WHEN THEY FLY YOU THROUGH THE LOC.

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.