What was found
DURING TAKEOFF PROCEDURES THE PILOT REJECTED TAKEOFF BECAUSE NO SPEED INDICATION ON PFD1 & RETURNED TO THE GATE FOR MX. THE ACFT WAS HELD ON GND IN ORDER TO PERFORM FAULT ANALYSIS IAW TSM 34-13-00-810-998, FLUSHING THE PRINCIPAL TOTAL PRESS LINES OF THE AIR DATA SYS IAW AMM 34-10-00-170-001-A, PERFORMED PITOT DRAINS HOLE CLEAN UP, PERFORMED FUNCTIONAL TEST OF THE ALTITUDE & AIRSPEED DATA IAW AMM 34-13-00-720-009-A WITH NORMAL RESULTS. THE ACFT WAS RETURNED TO SERVICE.