What was found
ELEVATOR CONTROL/TRIM: DURING FLIGHT THE ELEVATOR TRIM KEPT TRYING TO TRIM NOSE DOWN BUT KEPT SPRINGING BACK, SEE VIDEO. WITH AP DISCONNECTED I TRIED TO MANUALLY TRIM BUT TRIM WAS FROZEN IN PLACE. //SIGNOFF// PERFORMED SUCCESSFUL OPS CHECK OF ELEVATOR TRIM TAB SYSTEM. REF CESSNA 560XLS AMM 27- 32-(13. DETERMINED THE B.£VATOR TRIM ACTUATORS WERE IN NEED OF GREASE. APPLLED MOLYICOTE 33 GREASE (PN: 5565450-28) TO B0111 ACTUATORS.. OPS CHECK GOOD. REF CESSNA 560XLS AMM 12-20-27.