As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
A 20 KTS DIFFERENCE BETWEEN CAPTAIN/FIRST OFFICER'S AIR SPEED INDICATORS AS WELL AS 200 FT DIFFERENCE IN THE ALTIMETERS. BOTH WERE INTERMITTENT. 73-31641 - PERFORMED FIM TASK 73-28-00-810-803-F00. FOUND FAULTY LEFT PITOT ADM R& R LEFT PITOT ADM PER AMM 34-21-04-400- 801. OPS CHECKED GOOD. ROTABLE PARTS CHANGE WAS INDICATED - TT # 1384856 S/N OFF 05645 MODULE, AIR DATA OFF 29-3413-9-0001 5645 ON 29-3413-9-0001 4648.