As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: EMERGENCY DECLARED; AIRCRAFT LANDED WITHOUT INCIDENT. AT 35,000 GOT AIRSPEED UNRELIABLE INDICATIONS ON BOTH PFD'S. WENT AWAY, ONLY TO RETURN A FEW MINUTES LATER. FO'S PFD WAS ERRATIC. FINISHED FLIGHT ON CA PFD & STBY INSTRUMENT COINCIDENCE WITH CHARTED POWER SETTINGS & PITCH. EVENT WAS OVER BY 12,000 FEET. NORMAL LANDING. REMOVED AND REPLACED FO'S PITOT SYSTEM AIR DATA MODULE IAW AMM 34-21-04.