As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) PAN PAN DECLARED WITH ATC ACCOUNT OF AIR CONDITIONING PACK FAILURE AFTER DEPARTURE. 1 AIR CONDITIONING PACK WAS UNDER MEL AND INOPERATIVE. FLIGHT DESCENDED TO 10,000 FT ACFT WILL LAND APPROXIMATELY 1000 KGS OVER MLW NR 2 ENGINE FAN AIR VALVE REPLACED IAW AMM 36-11-09. FUNCTION & LEAK CHECKS CARRIED OUT.