What was found
AIRCRAFT WAS IN MAINTENANCE TO HAVE THE MAIN LANDING GEAR INSPECTED DUE TO PRIOR ISSUES NOTED ON OUR OTHER AIRCRAFT. PER OUR REQUEST, AIRCRAFT WAS PLACED ON JACKS AND THE LANDING GEAR WAS CYCLED TO SEE IF THERE WERE ANY ISSUES, IE; BINDING OR NOISES COMING FROM THE MAIN LANDING GEAR TRUNNIONS WHILE GEAR WAS BEING EXTENDED AND RE-TRACKED. TEXTRON AVIATION ORLANDO SERVICE CENTER MAINTENANCE TECHNICIANS NOTED THAT BOTH MAIN LANDING GEAR FORWARD TRUNNION PIVOT BEARINGS APPEARED TO BE SEIZED, WHICH IS CAUSING RESISTANCE/BINDING AND NOISE WHEN RETRACTING AND EXTENDING THE MAIN LANDING GEAR. MAINTENANCE CREWS ATTEMPTED TO GREASE THESE TWO FORWARD TRUNNION BEARINGS, HOWEVER ONLY ONE SIDE INITIALLY WOULD ACCEPT GREASE. AFTER SOME EFFORT, THE SECOND SIDE STARTED ACCEPTING GREASE. ONCE BOTH MAIN LANDING GEAR FORWARD PIVOT BEARINGS WERE GREASED, THE NOISE AND BINDING OF THE TRUNNIONS DECREASED WHEN CYCLING THE GEAR. IT WAS THE ORLANDO SERVICE CENTER THEN REMOVED BOTH MAIN LANDING GEAR TRUNNION ASSEMBLIES FROM THE AIRCRAFT TO INSPECT THE FORWARD PIVOT BEARINGS AND PIVOT PINS. AFTER REMOVAL OF BOTH TRUNNIONS, THE LEFT FORWARD BEARING/PIVOT PIN WERE SEIZED TOGETHER. AND AFTER SEVERAL HOURS, THE OLD PIN AND PIVOT BEARING WERE REMOVED. THE MAIN LANDING GEAR ASSEMBLIES WERE REINSTALLED WITH NEW FORWARD TRUNNION PIVOT BEARING AND PIVOT PINS. NOTE: LUBRICATION INTERVAL PER THE TEXTRON AVIATION 525C MM FOR THIS BEARING IS ONCE EVERY 12 MONTHS, THIS AIRCRAFT IS APPROXIMATELY 8 MONTHS OLD.