As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3023 THE CREW REPORTED THE CAPTAIN’S PITCH TRIM SWITCH STUCK IN TRIM DOWN POSITION. SIX SECONDS LATER THE CREW RECEIVED A MASTER WARNING "PTRIM CPT SW FAIL". THE AIRCRAFT WAS REMOVED FROM SERVICE. CLEANED & LUBED CAPTAIN’S PITCH TRIM SWITCH IAW EMB AMM: 23-40-03. THE OPERATIONAL CHECK WAS GOOD IAW EMB 140 AMM 23-40-03. THE AIRCRAFT WAS RETURNED TO SERVICE.