As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT THE FLIGHT CREW COULD NOT OPEN NR 2 ENGINE AIR INLET VALVE. CYCLED THE SWITCH SEVERAL TIMES. AIR CREW DECLARED AN EMERGENCY AND AIRCRAFT MADE AN EMERGENCY LANDING. MAINTENANCE INSPECTED THE NR 2 ENGINE ANTI-ICE SYSTEM AND DEFERED THE SYSTEM PER THE MEL.