What was found
DTW - AFT CEILING EMERGENCY LIGHTS INOPERATIVE. REPLACED BATTERY PACK FOR AFT CEILING EMERGENCY LIGHTS. SYSTEM GROUND CHECKED NORMAL OPERATION.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DTW - AFT CEILING EMERGENCY LIGHTS INOPERATIVE. REPLACED BATTERY PACK FOR AFT CEILING EMERGENCY LIGHTS. SYSTEM GROUND CHECKED NORMAL OPERATION.