As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF CAME ON THREE DIFFERENT TIMES. 20KTS SPLIT BETWEEN CA AND F.O. INDICATORS. AFTER VERIFYING AIRSPEED WITH STAY IT WAS THE CAPTAINS SIDE THAT WAS OFF<[01] R&R'D LEFT PITOT AIR DATA MODULE PER MM 34-21-04 OPS CKS GOOD AND C/W LEFT PITOT SYSTEM LEAK TEST PER MM 34-11-00. ALC RECERTIFIED TO CAT III PER MT 734-00-03;[02] USED PITOT-STATIC TESTER T014056. S/N WN0005. FORGOT TO ADD PRIOR TO CLOSING FAULT.