What was found
ON TAKE OFF THE MASTER WARNING LIGHT CAME ON , AND DOOR LIGHT ON PANEL WAS ON - ABORTED TAKE OFF AND RAN CHECK LIST FOR DOOR OPEN ON GROUND. TAKE OFF ABORT WAS 50 KTS AND NO EXCESSIVE BRAKING WAS USED. REMOVED FROM SERVICE. PERFORMED GVI OF ALL DOORS & FOUND AFT PAX DOOR HANDLE NOT FLUSH. PERFORMED OPERATIONAL TEST OF THE AFT PAX DOOR IAW AMM TASK 52-12-00-710-802. OPS TEST GOOD, DOOR HANDLE FLUSH. COULD NOT DUPLICATE. RETURNED TO SERVICE. NO PARTS REPLACED.