What was found
ABORTED TAKEOFF DUE TO MASTER WARNING FUSELAGE DOORS. IT WAS INTERMITTENT AND SOUNDED 3 TIMES. STARTED RIG OF THE VENT DOOR MECHANISM IAW 52-00-00-830-801 PARA 1-4B. RIG CHECKED GOOD. PERFORMED GVI OF AFT SERVICE DOOR PROXIMITY SENSOR WIRING HARNESS. NO DEFECTS NOTED. INTERROGATED PSEU FOUND SENSORS TO BE WITHIN LIMITS. CONTINUED RIGGING OF THE VENT DOOR IAW 52-00-00-830-801 PAR 4. D-H AND PARA 5 A. COMPLIED WITH TASK 52-00-00-830-801PARA 5 E. PARA 5 D. INTERROGATED PSEU AND FOUND TO BE WITHIN LIMITS. RETURNED TO SERVICE.