As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PERFORMED AN AIR TURN BACK WHILE ENROUTE DUE TO VARYING INDICATIONS FROM ALL THREE AIRSPEED INDICATION SYSTEMS AS WELL AS MULTIPLE CORRESPONDING AIR DATA FAILURE/FAULT ANNUNCIATIONS. MAINTENANCE REPLACED ALL THREE PITOT PROBES AND PERFORMED THE REQUIRED LEAK AND FUNCTIONAL CHECKS. THE AUTOFLIGHT RTS CHECKS ALSO PASSED. THE ACFT HAS RETURNED TO SERVICE.