As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
R1 DOOR WILL NOT ARM. THE DOOR WAS OPENED & CLOSED. ON TROUBLESHOOTING, FOUND THE R1 DOOR SLIDE ATTACHMENT LANYARD BLOCKING THE GIRT BAR OPERATION. THE LANYARD WAS PROPERLY STOWED. VERIFIED PROPER DOOR ARMING FUNCTION. OPS CHECK GOOD. NO DEFECTS FOUND.