What was found
DURING NORMAL OPERATIONS, THE TRIM SYSTEM CONTINUED TO DRIVE TO THE LEFT LATERAL CYCLIC STOP. ATTEMPTS TO BRING THE TRIM BACK TO THE NEUTRAL POSITION WERE UNSUCCESSFUL FROM BOTH THE PILOTS AND COPILOTS POSITION (STICK). TRIM SYSTEM CIRCUIT BREAKER WAS PULLED TO PREVENT ANY FURTHER PROBLEMS, AND THE AIRCRAFT WAS FLOWN BACK TO FACILITY WHILE GREAT FORCE WAS EXERTED TO OVERCOME THE TRIM-SPRING CAPSULE. AFTER SHUT DOWN, THE STICK WAS RELAXED. AFTER REPLACING PILOT'S TRIM SWITCH AND RESETTING CIRCUIT BREAKER, ALL GROUND AND FLIGHT TESTS CHECKED GOOD.