As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - MAINTENANCE FOUND THE EMERGENCY LIGHTS CONTROLLED BY POWER SUPPLY M1435 AT STATION 727G, RIGHT SIDE, EXTINGUISH AFTER ABOUT 5 SECONDS FROM WHEN EMERGENCY LIGHT SWITCH IS TURNED ON. MAINTENANCE REMOVED AND REPLACED THE BATTERY PACK. OPS CHECK GOOD. (M)