As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOTS DISPLAY LOST ALL VSPEEDS DURING TAKEOF ROLL, TAKEOF WAS ABORTED. V-SPEEDS REAPPEARED UPON TAXI BACK TO RAMP. TROUBLESHOT SYSTEM USING PITOT/STATIC CART AT ALL AIRSPEEDS AND ALTITUDES, NOT DEFECTS NOTED. CREW PERFORMED 2 HIGH SPEED TAXI WITH NO DEFECTS NOTED. SWAPPED J#1 AND #2 ADC AND DISCREPANCY REAPPEARED ON CO-PILOT DISPLAY. REPLACED THE SUSPECT #2 ADC UNIT, AND OPS TESTED GOOD.