What was found
MAIN DOOR: CREW LEFT AIRPLANE AND WENT INSIDE FBO. WHEN WE RETURNED, WE WERE UNABLE TO OPEN THE MAIN DOOR. THE HANDLE ACTUATES CORRECTLY WITH NO BINDING. CREW WAS FINALLY ABLE TO OPEN DOOR WITH BOTH PILOTS PUSHING ON THE DOOR AS WE CLOSED IT. WE THEN HAD ONE PILOT INSIDE AND ONE OUTSIDE TO SEE IF WE COULD FIND THE ISSUE. THE PILOT INSIDE FOUND WITH THE PRE-CATCH PULLED OUT (RELEASED), WE WWRE ABLE TO OPEN THE DOOR. WITH PRE-CATCH IN NORMAL POSITION, WE WERE UNABLE TO OPEN DOOR. CORRECTIVE ACTION; COMPLETED DOOR OPS CHECKS WITH NO FAULTS. COMPLETED CHECKS OF THE PRE-CATCH WITH NO FAULTS. COMPLETED CABLE TENSION CHECKS AND FOUND THEM TO BE WITH IN LIMITS. COMPLETED DETAILED MEASUREMENT OF PRECATCH AND FOUND THE CATCH FLUSH BUT AT .215 EXTENDED AND THE OUTER PUSH BUTTON IN TOO FAR. GAINED ACCESS BY RNANOUVERING GALLEY AND COMPLETED ADJUSTMENTS OF PRE-CATCH TO WITH IN AMM AND NJA STANDARDS. COMPLETED OPERATIONAL CHECKS OF THE PREC:ATCH AND DOOR SEVERAL TIMES AGAIN WITH NO FAULTS. RESTORED ALL ACCESS ITEMS AS REQUIRED. WORK DONE WITH REFERENCE TO 52-10-01