As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMBOUT NO AIR SPEED WAS INDICATED ON CAPTAINS INDICATOR. SWITCHED TO BOTH ON 1 AND BOTH ON 2 AND PROBLEM REMAINED. AIRCRAFT RETURNED TO GATE WITH NO INCIDENT. FOUND PITOT FITTING ON NR 1 AIR DATA COMPUTER DEFECTIVE. REMOVED AND REPLACED FITTING IAW MM CHAPTER 20. PERFORMED PITOT/STATIC CHECK IAW MM 34-11-00, NO DEFECTS NOTED.