As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 2977 DURING CRUISE AT FL 340, THE CREW REPORTED A PTRIM MAIN INOPERABLE WARNING MESSAGE ON EICAS. THE CREW FOLLOWED AOM1 PROCEDURES, BACK UP SYSTEM OK. THE CREW DECLARED AN EMERGENCY AND LANDED WITHOUT INCIDENT. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE FIRST OFFICER’S YOKE PITCH TRIM SWITCH IAW EMB 135 AMM 27-43-01. THE OPERATIONAL CHECK WAS GOOD AT THIS TIME. THE AIRCRAFT WAS RETURNED TO SERVICE.