What was found
ABORTED TAKEOFF, ON TAKEOFF, EN ROUTE, THERE WAS NO AIRSPEED INDICATION ON CAPTAINS AIRSPEED INDICATOR, REJECTED TO AT 80 KTS. MAINTENANCE FLUSHED CAPTAINS PITOT TUBE DRAIN LINES AND PERFORMED INTERFACE TEST IAW AMM 10-00-170-001 AND AMM 34-13-00-740-002.