What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT DIVERTED TO PHL. AFTER TAKE OFF DURING CLIMB THE ENGINE COWL ANTI-ICE VALVE FAILURE LIGHTS ILLUMINATED ON BOTH ENGINES. THE FLIGHT CREW ACCOMPLISHED THE QRH PROCEDURES AND LANDED SAFELY AT PHL WITHOUT FURTHER INCIDENT. MAINTENANCE ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK OF THE #1 ENGINE ANTI-ICE SYSTEM PER AMM 30-21-00-71-801 WITH NO FAULTS NOTED. (AALA202311020922) MAINTENANCE REPLACED THE #2 ENGINE ANTI-ICE VALVE PER AMM 30-21-11. (AALA202311027992)