As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PITCH TRIM 1 INOPERATIVE WARNING APPEARED ON EICAS USED STANDBY TRIM FOR REMAINDER OF THE FLIGHT. DECLARED EMERGENCY AND RETURNED TO BOS. REMOVED AND REPLACED CAPTAIN YOKE PITCH TRIM SWITCH IAW EMB135 AMM 27-40-02-001-400-801-A, OPS CHECK GOOD. (M)