As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT 5003, ON THE GROUND IN LAS 1R DOOR SLIDE DIFFICULT TO ARM. WE WERE ABLE TO LOWER THE HANDLE TO GET IT ARMED INDICATING ARMED. HOW EVER IN FLIGHT NOTICED IT IS NOT SHOWING ARMED ANYMORE ON COCKPIT & FA SCREENS. CORRECTIVE ACTION: PERFORMED R1 DOOR OPERATIONAL TEST PER A321 AMM 52-10. DOOR OPERATES AND ARMS NORMALLY, DOOR PAGE INDICATION OPERATES CORRECTLY. OK FOR SVC. (LP 5912570)