As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REPEAT WRITE UP UNABLE TO OPEN MAIN CABIN DOOR KEY UNLOCKS DOOR RELEASE BUTTON PUSHES IN BUT HANDLE STAYS FLUSH AND CANNOT BE OPERATED TO OPEN. FOUND EXCESSIVE GREASE ON MAIN PASSENGER DOOR EXTERNAL HANDLE SHAFT. CLEANED GREASE OFF AND PERFORMED NUMEROUS OPERATIONAL CHECKS PER CL-650 AMM 52-11-00. OPS CHECKS SATISFACTORY WITH NO OTHER DEFECTS NOTED. VISUALLY INSPECTED HANDLE WITH NO DEFECTS NOTED.