What was found
MAIN CABIN DOOR HANDLE HANGS UP DURING OPENING. DOOR IS OPEN ABOUT 3/4" WHEN IT HANGS, THEN IT WILL NOT OPEN THE REST OF THE WAY. 15 LBS FORCE TO OPEN, 30 TO CLOSE, WITHIN LIMITS. CLEANED & LUBED MAIN DOOR EXTERIOR HANDLE MECHANISM, FUSELAGE ROLLERS & DOOR LOCKS. OPERATIONS CHECKED OK IAW AMM 52 18 00.