What was found
ON OPENING MAIN DOOR, RED HANDLE DOES NOT GO FULLY DOWN & RESULTING IN SKIN TO SKIN CONTACT WITH DOOR TO FUSELAGE. CREW CAN MOVE HANDLE DOWN MANUALLY & HANDLE WILL MOVE BY ITSELF & SKIN TO SKIN CONTACT. OPENED MAIN DOOR FROM OUTSIDE & NOTICED MAIN DOOR DID NOT TOUCH FUSELAGE. RED HANDLE ALL THE WAY DOWN WHEN DOOR IS FULLY LOWERED. INSPECTED & CHKD OPEN LOCK LEVER ON AFT SIDE OF MAIN DOOR FOR STIFFNESS BY EXERCISING OPEN LOCK LEVER. NOTICED OPEN LOCK LEVER SQUEAKING & FELT RESISTANCE INDICATING HINGE LOCK LATCHING ASSY MAY BE STUCK, CAUSING MAIN DOOR CONTACT FUSELAGE. REMOVED AIR STAIR ASSY FROM MAIN DOOR & VISUALLY INSPECTED LATCHES & STOPS. STOPS ENGAGED IN HOOKS. LUBED MAIN ENTRY DOOR OPEN LOCK LEVER ASSY & HOOKS. EXERCISED OPEN LOCK LEVER & NOTICED OPEN LOCK LEVER NOT SQUEAKING & NO RESISTANCE FELT. INSTALLED AIR STAIR ASSY BACK ON MAIN DOOR. POWERED UP ACFT WITH A GPU & PERFORMED MULTIPLE OPS CHK OF MAIN DOOR. MAIN DOOR DOES NOT CONTACT FUSELAGE WHEN FULLY LOWERED & STOPS ENGAGED IN HOOKS. DOOR OPS CHECK PASSED. AIR STAIR LIGHTS OPS CHECK PASSED. WORK PERFORMED IAW AMM 52-11-00, 52-11-31, & 12-22-00.