What was found
THE L4 DOOR SLIDE SHOWED NOT ARMED SEVERAL TIMES DURING FLIGHT. WHEN ARM LEVER WAS PRESSED, THE SLIDE SHOWED ARMED AGAIN, BUT LATER AGAIN INDICATED DISARMED. WHILE USING PROPER MONITOR & CHALLENGE PROCEDURES, REMOVED DEBRIS FROM THE GIRT BAR ATTACH FLOOR FITTING. OK FOR CONTINUED SERVICE IAW GPM 13-19-1.