As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PRIMARY STABILIZER TRIM INOPERATIVE PASSING 10K AT 280KTS. THE CREW CHOSE TO MAINTAIN 280KTS DURING FLIGHT AND PERFORMED THE QRH PROCEDURES FOR PRIMARY TRIM INOPERATIVE. THE ALTERNATE TRIM OPERATED NORMALLY. AN EMERGENCY WAS DECLARED. MAINTENANCE REPLACED THE PRIMARY STABILIZER TRIM MOTOR IAW AMM AND RETURNED THE AIRCRAFT BACK TO SERVICE.