What was found
AIRCRAFT WAS NOT GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO PHL DUE TO THE FLIGHT CREW REPORTING AN AIR ENGINE 1 BLEED ABNORMAL PRESSURE ECAM MESSAGE. THE FLIGHT CREW FOLLOWED ECAM PROCEDURES AND ATTEMPTED A QRH RESET WHICH WAS UNSUCCESSFUL. THE AIRCRAFT LANDED SAFELY AT PHL WITHOUT FURTHER INCIDENT. MAINT REPLACED NR 1 ENGINE REGULATED BLEED PRESSURE TRANSDUCER PER AMM 36-11-16. MAINTENANCE ALSO FOUND A DISCONNECTED SENSE LINE ON PYLON INTERFACE DUCT AND SECURED THE SENSE LINE PER AMM 36-11-49. A SATISFACTORY LEAK & OPS CHKD WITH NO FAULTS NOTED.