What was found
SHORTLY AFTER THE A/C ARRIVED IN (DIA) MX WAS REQUESTED TO INSPECT THE PAX DOOR AS A RESULT OF DOOR BEING DIFFICULT TO CLOSE FROM TUL. MX INSPECT DOOR AND DISCOVERED AFT MAIN DOOR SUPPORT HINGE CRACKED ALMOST INTO, CRACK WAS COMPLETELY THROUGH THE UPPER FLANGE AND WEB MEMBER AND CONTINUED THROUGH LOWER FLANGE. THE A/C WAS FERRIEDTO COS, WHERE THE DOOR COULD BE REPAIRED. MX ELECTED TO REPLACE THE COMPLETE DOOR ASSY. THE DOOR ASSY WAS REPLACED IAW AMM 52-12-00. UPON REMOVAL OF DOOR ASSY MX NOTICED DAMAGE TO THE EXT SKIN OF THE DOOR. SUBMITTER STATES, SUSPECT DAMAGE WAS RESULT OF SOMEONE PLACING SUPPORT UNDER THE DOOR TO PREVENT FURTHER DAMAGE TO THE HINGE SUPPORT.