As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHX - MAINTENANCE REPORTED THE EMERGENCY EXIT SIGN AT MID CABIN CEILING WAS INOPERATIVE. MAINTENANCE FOUND A BROKEN WIRE ON THE EMERGENCY EXIT SIGN. DISCOVERED THAT BROKEN WIRE SHORTED OUT POWER SUPPLY. REPLACED BOTH THE EMERGENCY EXIT SIGN AND POWER SUPPLY PER MM 33-51-51-2. OPERATIONAL CHECK GOOD.