What was found
AFTER TAKEOFF AT JFK EN ROUTE TO PHX, RECEIVED ECAM MESSAGE "AIR ENG 1 BLEED ABNORMAL PRESSURE", NR 1 ENGINE BLEED VALVE WOULD NOT OPEN, DIVERTED TO BWI FOR REPAIR. MX T/S PER TSM 36-11-00-810-809A, BLEED PRESSURE REGULATOR VALVE FAILED 20 PSI TEST PER STEP 2, REMOVED AND REPLACED BLEED PRESSURE REGULATOR IAW AMM 36-11-52-04. ALSO, REPLACED NR 1 ENGINE HIGH PRESSURE VALVE (HPV) IAW AMM 36-11-51-04, AND AS A PRECAUTION REPLACED TEMPERATURE LIMITATION SOLENOID THERMOSTAT IAW AMM 36-11-55-000-001. OPERATIONAL AND LEAK CHECK WAS GOOD. SUPP - VENDORS INCOMING TEST OF PRESSURE REGULATOR VALVE S/N 00513 CONFIRMED REASON FOR REMOVAL, UNIT FAILED INTERNAL LEAKAGE TEST.