As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) STAB TRIM FAILED BOTH CHANNELS ON APPROACH INTO BOSTON. EMERGENCY LANDING DECLARED BY FLIGHT CREW. HORIZONTAL STAB CONTROL UNIT (HSTCU, MOTORS CONTROL UNIT (MCU) AND HORIZONTAL STAB ACTUATOR (HSTA)REPLACED. SYSTEM TESTED AS PER AMM. CONSIDERED SERVICEABLE.