What was found
INCREASED COLLECTIVE FORCES WERE REQUIRED TO CONTROL AIRCRAFT. AN INSPECTION OF THE ENTIRE FLIGHT CONTROL SYS WAS PERFORMED WITH NO ANOMALIES. IT WASN`T UNTIL THE COLLECTIVE SERVO ACTUATOR WAS REPLACED THAT THE DISCREPANCY CLEARED. THIS SERVO WAS INSTALLED ON 7/25/12 AS "MODIFIED" AFTER MFG ASB 430-11-46, REV A HAD BEEN COMPLIED WITH AT REPAIR STATION. SERVO ACTUATOR WAS CONVERTED FROM 222-382-001-107 TO 222-382-001-111FM. DURING SAME VISIT TO THE REPAIR STATION. THIS PART ACCUMULATED 1063.0 HOUR SINCE INSTALLED ON THIS ACFT.