What was found
ORD - DURING OVERNIGHT MAINTENANCE, EMERGENCY AC BUS LIGHT INOPERATIVE. REPLACED EMERGENCY AC BUS LIGHT SWITCH. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
ORD - DURING OVERNIGHT MAINTENANCE, EMERGENCY AC BUS LIGHT INOPERATIVE. REPLACED EMERGENCY AC BUS LIGHT SWITCH. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)