What was found
AIRCRAFT WAS GROUNDED. 1L DOOR 1R DOOR SLIDE INDICATION CHANGED FROM ARMED TO DISARMED WHILE IN FLIGHT WITH 1L AND 1R DOOR SLIDE ARM LEVERS IN THE ARMED POSITION. CABIN PRESSURIZED LIGHT FLASHING. AIRCRAFT RETURNED TO DFW WHERE IT LANDED SAFELY WITHOUT FURTHER INCIDENT. EMERGENCY NOT DECLARED. FOUND L1 AND R1 GIRT BAR FLOOR FITTINGS STIFF. CLEANED DEBRIS FROM L1 AND R1 (AALA202101049025) GIRT BAR FLOOR FITTINGS, PER AMM 52-10-00.