What was found
(CAN) ON TAKEOFF, EXPERIENCED AT APPROXIMATELY 90 KTS "AIRSPEED DISAGREE" ON BOTH PFD`S. TAKEOFF CONTINUED WITH QRH PROCEDURE APPLIED AND ACFT RETURNED SAFE. THE EXTENSIVE TROUBLESHOOTING CARRIED OUT, DID ISOLATE A BUG BLOCKING F/O PITOT PROBE. COMPLETE INFO FOR T/S AND RECTIFICATIONS ARE DETAILED IN THE ATTACHED JOURNEY LOG PAGES. THE ACFT HAS BEEN RETURNED TO SERVICE WITH NO FURTHER OCCURRENCES ON SAME MATTERS.