What was found
ON TAKE-OFF ROLL, AFT ENTRY DOOR INDICATOR ILLUMINATED. THE CREW EXECUTED A REJECTED TAKE-OFF AT 90 KTS. INDICATED AIRSPEED AND RETURNED TO THE GATE WITHOUT FURTHER INCIDENT. MAINTENANCE FOUND AND REMOVED DEBRIS FROM THE DOOR TRACK, INSPECTED AND OPS CHECKED THE DOOR, AND RETURNED THE AIRCRAFT TO SERVICE.