As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - FLT 4303 - DURING DESCENT, CREW REPORTED PITCH TRIM ONE AND TWO TO BE INOPERATIVE WITH NO EICAS MESSAGE. MAINTENANCE COMPLIED WITH ETN EB 27-022 AND REMOVED AND REPLACED THE HORIZONTAL STABILIZER CONTROL UNIT AND HSCU SHOCK MOUNTS. OPERAITONAL CHECK WAS GOOD AND AIRCRAFT WAS RETURNED TO SERVICE. (M)