As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PRIMARY TRIM FAILED DURING FLIGHT CLIMBING THRU 10000. NEITHER CAPTAIN OR FIRST OFFICER TRIM YOKE SWITCHES WOULD CONTROL TRIM. AUTO PILOT FAILED DURING TURN TO JOIN APPROACH COARSE. ON APPROACH TRIED PRIMARY TRIM ONCE MORE, WORKED FOR ABOUT 2 SEC, 2 1/2 DEGREES OF TRIM BEFORE FAILING AGAIN, USED ALTERNATE TRIM REMAINDER OF FLIGHT. R & R PRIMARY BRAKE MOTOR IAW 27-40-01. OPERATIONS CHECKED GOOD.