What was found
AIRCRAFT WAS NOT GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO PHL DUE TO THE FLIGHT CREW REPORTING THAT THE APU BLEED WAS USED FOR TAKEOFF AND 10 MINUTES AFTER SHUTTING DOWN APU IN CLIMB THEY RECEIVED AN AIR APU BLEED LEAK ECAM MESSAGE - THE FLIGHT CREW TURNED OFF ENG 1 BLEED AND PACK 1 PER QRH - THE FLIGHT CREW REPORTED THAT THEY COULD NOT CONTINUE FLIGHT AND AVOID ICING CONDITIONS WITH FORECASTED WEATHER AHEAD - THE AIRCRAFT LANDED SAFELY AT PHL WITHOUT FURTHER INCIDENT -MAINTENANCE PERFORMED A GROUND SCAN TEST OF BOTH BMC1 AND BMC2 WITH NO FAULTS NOTED AT THIS TIME