What was found
DURING TAKEOFF ROTATION, A DISTINCT BUMP & REARWARD FORCE OCCURRED IN THE CONTROL YOKE. AS THE ACFT ACCELERATED, EXCESSIVE NOSE DOWN TRIM WAS REQUIRED. AT MAXIMUM NOSE DOWN SETTING -1.2, ANY SPEED ABOVE 156 KNOTS WAS OUT OF TRIM & REQUIRED FWD CONTROL YOKE FORCE. INSPECTED THE LINEAR ACTUATOR, AND FOUND INSTALLED PROPERLY. FURTHER INSPECTION FOUND THE LINK ASSEMBLY SHEARED. THE INBD LINK WAS REMOVED & THE REPLACEMENT LINK WAS INSTALLED. THE ACTUATOR ASSEMBLY WAS INSTALLED & RECONNECTED IAW MM 27-40-00 & ASL680-27-02. PERFORMED RIGGING OF MACH TRIM SYS IAW MM 27-40-00. RIGGING & TRAVEL CHECKED GOOD. PERFORMED THE OPS CHECK, CHECKED GOOD. VERIFIED INSTALLATION & OPS CHECKED GOOD.