What was found
MAIN DOOR HANDLE: MAIN CABIN DOOR HANDLE WILL NOT MOVE TO THE LOCK POSITION. PREFLIGHT. // SIGNOFF// REMOVED MAIN ENTRANCE DOOR STAIRS AND ACCESS PANELS IAW CE680A AMM 52-10-50. INSPECTED ALL LATCH/LOCK ASSEMBLIES AND FOUND THE FWD CENTER LATCH/LOCK PIN STUCK ON DOOR FRAME. REPOSITIONED FWD CENTER LATCH/LOCK PIN AND LUBED IAW CE680A AMM 52-10-07. PERFORMED NUMEROUS OPS CHECKS OF THE CABIN DOOR IAW CE680A AMM 52-10-00. OPS CHECK GOOD AT ALL TIMES. NO FURTHER DEFECTS NOTED. REINSTALLED MAIN ENTRANCE DOOR STAIRS AND ASSOCIATED PANELS IAW CE680A AMM 52-10-50.