What was found
FLT 240 - HNL - PRIMARY TRIM FAILURE, NO ALERT. ON CLIMB-OUT AND RETURN TO HNL, TRIM STARTED WORKING AGAIN ON SHORT FINAL APPROACH. TRIED USING PRIMARY TRIM SEVERAL TIMES IN FLIGHT. RAN F/O, CAPTAIN CONTROL, DID NOT WORK. REMOVED AND REPLACED HORIZONTAL STABILIZER PRIMARY TRIM MOTOR PER AMM 27-41-10. OPS CHECK OK FROM BOTH CAPTAINS AND F/O'S SWITCHES. (M)