As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB-OUT, CAPTAIN NOTED HIS PITCH TRIM SWITCH DOING THE OPPOSITE OF WHAT WAS COMMANDED. FIRST OFFICER AND STAND BY SWITCHES OPERATED NORMAL. AIRCRAFT WAS RETURNED TO CRP SAFELY WITH NO FURTHER INCIDENTS REPORTED. C/A- MAINTENANCE REMOVED AND REPLACED THE PILOTS TRIM SWITCH IAW EMB MM. OPERATIONAL CHECK WAS GOOD AND AIRCRAFT WAS RETURNED TO SERVICE.