What was found
AFTER LANDING IN DAL, WITH PASSENGERS ON BOARD, UNABLE TO OPEN MAIN CABIN DOOR. HANDLE WENT ABOUT 1/2 TRAVEL, & JAMMED. HANDLE WOULD NOT BUDGE, IN OR OUT. WITH ASSISTANCE FROM GROUND PERSONNEL, WE WERE ABLE TO OPEN DOOR. PERFORMED AN EVALUATION & FOUND NO PHYSICAL DEFECTS. WHEN FIRST OPENING DOOR, EXTERIOR HANDLE WORKS PROPERLY & DOOR FALLS ON ITS OWN. WHEN ATTEMPTING TO OPERATE INTERNAL DOOR HANDLE FOUND HANDLE TO BE DIFFICULT TO MOVE. CONFIRMED WITH THE DOOR BOTH FULLY SHUT & DOOR OPEN ATTEMPTING THE HANDLE ALONE. REMOVED COVER & EVALUATED. THERE WAS DEBRIS BUILD UP. DUSTED AREA OUT & HELPED SMOOTH OPS OF HANDLE. LUBRICATED HANDLE. FOR EXTRA PRECAUTION, INSPECTED DOOR LATCH HOLES & LATCHED TO ENSURE NO UNUSUAL TRAVEL WHEN PINS ARE ATTEMPTING TO LATCH. CLEANED INTERNALS OF PIN HOLES & PINS. LUBED AS REQUIRED. CLEANED DOOR MED SEAL TO ENSURE NO STICKING. PERFORMED CHKS OF DOOR. AFTER STEPS OPS SMOOTH BOTH CLOSING & OPENING, INTERNALLY & EXTERNAL. WORK PERFORMED IAW AMM 52-10-00.