As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - CREW REPORTED DURING CLIMBOUT THE SPEED TRIM TAIL LIGHT AND STAB OUT OF TRIM LIGHT ILLUMINATED WHEN THE AUTO PILOT WAS TURNED ON. THE AUTO PILOT WAS DISCONNECTED AND THE ELECTRIC TRIM DID NOT WORK BUT THE HAND TRIM DID. EMERGENCY DECLARED FLIGHT LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED STAB TRIM MOTOR. SYSTEM GROUND CHECK NORMAL OPERATION.