As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
YYZ- FLT 4904 - DURING APPROACH WHEN AUTO PILOT WAS DISCONNECTED, PITCH TRIM 1-2 INOPERATIVE MESSAGE CAME ON EICAS. STAYED ON FOR A FEW SECONDS THEN WENT OUT. BOTH PITCH TRIM SWITCHES WORKED. LANDED WITHOUT FURTHER PROBLEMS. MAINTENANCE COMPLIED WITH ETN EB 27-022. THE HSCU WAS REMOVED AND REPLACED IAW EMB MM. OPERATIONAL CHECK WAS GOOD AND AIRCRAFT WAS RETURNED TO SERVICE. (M)