As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MIA - FLT 5017 - DURING WALK AROUND CREW NOTED EMERGENCY LIGHT AT BOTTOM OF MAIN CABIN DOOR AND SOME EMERGENCY LIGHTS IN THE FORWARD CABIN TO BE INOPERATIVE. MAINTENANCE REMOVED AND REPLACED A POWER SUPPLY UNIT (P/N 301180, S/N 1374) AND A BATTERY PACK (P/N 3011151, S/N 6400) IAW ATR MM. OPERATIONAL CHECK WAS GOOD AND AIRCRAFT WAS RETURNED TO SERVICE. (M)