What was found
MAIN CABIN DOOR HANDLE HARD TO CLOSE. WHEN WE FINALLY GOT THE DOOR HANDLE STOWED AND DOOR CLOSED, COULD NOT RE-OPEN DOOR. ARRIVED AND GAINED ACCESS TO AC. VERIFIED DISCREPANCY. PERFORMED GVI OF MAIN CABIN DOOR HANDLE AND FOUND "PUSH" BUTTON LOCKING PIN WAS MISPLACED, CAUSING THE DOOR TO STICK. RESECURED PIN AS REQUIRED. PERFORMED OPS CHECK. OPS CHECK SATISFACTORY. ALL WORK DONE IAW AMM 52-11-07.