What was found
ON TAKEOFF ROLL, NOTED FIRST OFFICER'S AIRSPEED INDICATION ON HIS PFD WAS NOT INCREASING. ABORTED TAKEOFF APPROX 100KTS. PRESSURIZED PITOT SYS REF MM 34-10-00-5, SEPARATED AND CAPPED PITOT TUBING RUN AS NECESSARY TO ISOLATE LEAK. FOUND CULPRIT TO BE SYSTEM DRAIN ASSY AT AFT LEFT OF NOSE GEAR WHEEL WELL. REPLACED NR 2 PITOT DRAIN ASSY REF SMP MM 20-23-11-0. REASSEMBLED ALL DISTURBED COMPONENTS, CLOSED AND SECURED ALL ACCESS PANELS. NR 1, NR 2, STDBY PITOT SYSTEMS OPS AND LEAK CK OK REF MM 34-10-00-5. REF RTO APPROX 100 KNOTS, INSPECTED WHEELS AND BRAKES REF MM 32-40-00-6. NO DEFECTS NOTED.