AN A320 RECEIVES A PRESSURIZATION WARNING ON ITS ECAM AS IT CLBS THROUGH 13000 FT ALT IN ZAU AIRSPACE. FLC DECLARES AN EMER AND DIVERTS TO DSM; IA.

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ORD-PHX. DURING FLT; WE RECEIVED A L WING LEAK MESSAGE ON ECAM. ECAM PROCS WERE FOLLOWED AND WE NOTIFIED DISPATCH AND MAINT CTL. A SHORT TIME LATER WE RECEIVED A R WING LEAK AND AN APU BLEED AIR LEAK MESSAGE. WE THEN LOST PRESSURIZATION. WE MADE AN EMER DSCNT INTO DSM. ON THE DSCNT THE R WING LEAK AND APU BLEED AIR LEAK MESSAGE CLRED. WE NO LONGER HAD AN ECAM INDICATION OF A LEAK. I RESET THE R PACK AND BLEED AND PRESSURIZATION WAS REGAINED. OPS WERE NORMAL AFTER THAT. WE LANDED THE ACFT IN DSM. AN EMER WAS DECLARED. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED THAT THEY RECEIVED THE L WING LEAK ECAM MESSAGE WHILE CLBING THROUGH 13000 FT. THEY ALSO RECEIVED A BLEED MGMNT COMPUTER MESSAGE AND THOUGHT THEY HAD A BLEED MGMNT COMPUTER FAULT OR A L BLEED FAULT. THEY CALLED COMPANY MAINT TO GET THEIR ADVICE OF WHETHER TO FLY ON OR RETURN TO ORD. THEY WERE ADVISED TO GET THE ACFT ON THE GND; PREFERABLY; SOON. IN A SHORT WHILE; THE L BLEED FAULT WENT OFF. THE THINKING WAS THAT THE BLEED MGMNT COMPUTER HAD FAILED; SO IT WOULD BE OK TO CLB HIGHER WITHOUT THE USE OF THE BLEED MGMNT COMPUTER. AS THEY CLBED TO FL240; THE R WING BLEED LEAD MESSAGE APPEARED; AND A BLAST OF HOT DRY AIR CAME INTO THE ACFT. WITH THAT HAPPENING; THE CAPT DECLARED AN EMER AND WENT TO THE CLOSEST FIELD; WHICH WAS DSM. WHEN THE ACFT WAS ON THE GND; THE ACR FLEW MECHS TO INSPECT THE ACFT AND THEY FOUND THAT THERE WAS A PNEUMATIC LEAK CLOSE BY WHERE THE HIGH PRESSURE AIR CONNECTS TO THE ACFT WHEN A GND START IS PERFORMED. THE ACFT HAD BEEN RECEIVED FROM A 'C' CHK 3 DAYS PRIOR. THE APU HADN'T BEEN WORKING THE PAST 3 DAYS. THE THEORY IS THAT THE 'C' CHK AND APU NOT OPERATING; THERE HAD BEEN MANY CONNECTS AND DISCONNECTS TO THE PNEUMATIC EXTERNAL AIR CONNECTION AND IT HAD BEEN USED SO MUCH THAT IT DISLODGED THE FASTENERS THAT HOLD THE CONNECTION IN PLACE. THAT WAS THE ONLY PLACE A LEAK OF PNEUMATICS APPEARED. ACFT WAS REPAIRED AND FLOWN OUT THE NEXT DAY.