As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DTW - FLT 417 - ON PREFLIGHT, FOUND FORWARD EMERGENCY OVERHEAD LIGHTS INOPERATIVE. REMOVED AND REPLACED FORWARD NR 2 AND NR 4 BATTERIES IN BATTERY PACK ON EMERGENCY OVERHEAD LIGHTS. OPERATIONAL CHECK ON EMERGENCY LIGHTS GOOD DC-9 MAINTENANCE MANUAL 33-50-0. (M)