ACR ACFT CABIN ALT EXCEEDS 10000 FT.

Narrative

OUR COMPANY AND BOEING ACFT COMPANY HAVE RECENTLY INSTITUTED A PROCEDURAL CHANGE IN THE TKOF CONFIGN FOR OUR ACFT TO INCLUDE TKOF AND DEP WITH THE PRESSURIZATION PACKS OFF UNTIL ESTABLISHED IN CLB. AS WE ROTATED FOR TKOF WE BLEW OUT A TIRE WHICH CAUSED STRONG VIBRATIONS AS THE GEAR WAS RAISED. THE 'RETURN TO NORMAL PRESSURIZATION WITH PACKS-OFF' PROC IS TO ESTABLISH CLB CONFIGN; TURN ON 1 PACK; WAIT FOR THE CABIN CLB RATE TO STABILIZE; TURN ON THE AUTO PRESSURIZATION CTL AND WAIT FOR IT TO STABILIZE; AND FINALLY TO TURN ON THE SECOND PACK. THE INITIAL STEPS OF THIS PROC HAD BEEN ACCOMPLISHED WHEN DEP CTL URGED US TO RETURN TO TWR FREQ FOR AN IMPORTANT MESSAGE. IT TOOK SOME TIME FOR US TO EVENTUALLY UNDERSTAND FROM THE SPANISH SPEAKING CTLR THAT WE HAD IN FACT BLOWN A TIRE. WE RETURNED TO DEP CTL AND CONTINUED WITH THE SUBSEQUENT STEPS IN THE PACKS-OFF PROC; BUT THE AUTO CTLR WAS QUITE SLOW TO STABILIZE AND AS WE PASSED ABOUT 11000 FT MSL THE CABIN ALT WARNING LIGHT ILLUMINATED; INDICATING THAT WE HAD EXCEEDED A CABIN ALT OF 10000 FT. THE ACFT WAS IMMEDIATELY LEVELED OFF; THE SECOND PACK TURNED ON; AND THE CABIN ALT SLOWLY RETURNED TO NORMAL. THERE WERE SEVERAL FACTORS CONTRIBUTING TO THIS EVENT. 1) THE PACKS-OFF TKOF PROC IS A RECENT CHANGE; AND ONLY USED ON 1 OF THE 3 MODELS OF THIS ACFT THAT WE FLY. 2) THE ACFT WAS UNUSUALLY LIGHT AND CLBED AT A VERY RAPID RATE. 3) THE DISTR OF THE BLOWN TIRE AND THE ADDITIONAL RADIO COMS THAT INTERRUPTED THE NORMAL AFTER TKOF AND CLB CHKLIST FLOW. 4) THE SLOW RESPONSE OF THE AUTO PRESSURIZATION CTLR DURING THE COMPLETION OF THE 'RETURN TO NORMAL PRESSURIZATION' PROC.