What was found
IT TOOK MULTIPLE ATTEMPTS TO GET THE DOOR OPEN FROM THE OUTSIDE. ALSO COULDN'T GET OUT OF THE AIRCRAFT WITHOUT PUSHING ON THE DOOR. WHEN IT CLOSES THERE SEEMS TO BE POPPING AND GRINDING WHILE IN TRANSIT. CORRECTIVE ACTION: CLEANED THE OUTER DOOR SEAL AND MAIN DOOR SUPPORT STRUT WITH ALCOHOL AND CHECKED DOOR OPERATION. DOOR OPERATES CORRECTLY AND MCC HAS ELECTED TO RELEASE AT THIS TIME. WORK IAW CE-680A AMM 52-10-04.