What was found
WHILE OPENING MAIN DOOR AFTER A FLT, FO NOTED MAIN DOOR DIFFICULT TO OPEN. ATTEMPT TO CLOSE & OPEN DOOR & NO ISSUES. ON 2ND FLT, DIFFICULT TO OPEN. ONCE DOOR CYCLED 1 TIME, EASY TO CLOSE & OPEN. OPENED & CLOSED MED WITH NO DEFECTS NOTED. PRESSURIZED ACFT TO 2PSI DELTA P VERIFIED AFTER PRESSURIZING, MED GRINDING WHEN OPENED. PERFORMED VISUAL INSPECT OF MED. FOUND CROWN WASHERS ON ROLLERS DID NOT HAVE REQUIRED CLEARANCE. REMOVED ALL 4 GUIDE FITTINGS REF AMM 52-11-01. INSTALLED 4 NEW GUIDE FITTINGS REF AMM 52-11-01. REMOVED ALL 4 CAM FOLLOWERS REF AMM 52-11-01. INSTALLED 4 NEW CAM FOLLOWERS REF AMM 52-11-02. RIGGING & OPS CHK OF GUIDE FITTINGS & CAM FOLLOWERS GOOD. NO FAULTS REF AMM-52-11-01.