What was found
DEN - ABORTED TAKEOFF - 6/9/01 - FLT 334 - ABORTED TAKEOFF AT APPROX 80 KTS DUE TO AFT ENTRY DOOR WARNING LIGHT CAME ON AND EXTINGUISHED TWICE; BRAKE COOLING COMPLIED. IN DEN MX INSPECTED THE DOOR AND FOUND IT CLOSED AND LOCKED NORMALLY; DETERMINED TO BE AN INDICATION PROBLEM. INDICATION WAS PLACED ON MEL 52-03 COND 1; LATER THAT SAME DAY IN PHX MX ADJUSTED THE AFT ENTRY DOOR WARNING SWITCH ACTUATOR TO SWITCH. OPERATIONAL CHECKS WERE GOOD AND NO FURTHER DISCREPANCIES HAVE BEEN REPORTED.