As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - DURING OVERNIGHT MAINTENANCE, RIGHT AFT CARGO DOOR EMERGENCY LIGHTS ILLUMINATED WHEN ALL POWER WAS REMOVED FROM THE AIRCRAFT. LIGHTS WENT OUT WHEN POWER WAS APPLIED. DURING TROUBLESHOOTING, COULD NOT DUPLICATE PROBLEM. SYSTEM GROUND CHECKED, NORMAL OPERATION. (X)