What was found
AFTER TAKEOFF, THE R1 DOOR WAS WHISTLING AND THE SLIDE ARMED LIGHT WAS FLASHING WHILE IN THE AIR. RETURNED TO DEPARTURE, NO EMERGENCY DECLARED. THE LIGHT CEASED FLASHING AFTER LANDING ONCE THE CABIN PRESSURE MATCHED THE OUTSIDE PRESSURE. TROUBLESHOT THE DOOR IAW TSM 52-11-00-810-812-A, THE DOOR SEAL WAS GOOD, NO DISCREPANCY. FOUND DEBRIS IN GIRT BAR FLOOR RETAINER. REMOVED THE DEBRIS. TROUBLESHOT THE SLIDE INDICATOR LIGHT IAW TSM 52-11-00-810-807-A, NO FAULTS. OPS CHECKED GOOD. AIRCRAFT OK FOR SERVICE.