As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN CRUISE, AIRSPEED WENT TO 60 KT AND STANDBY FLAGS IN BOTH AIRSPEED INDICATORS AND F/O'S ALTIMETER. REGAINED AIRSPEED INDICATOR JUST BEFORE LANDING. PURGED SYSTEM WITH NITROGEN AND PERFORMED OPERATIONAL LEAK CHECK WITH PITOT STATIC RAMP TESTER WITH NO DEFECTS NOTED.