As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON APPROACH, LOST ALL AIR DATA ON BOTH PFD. DATA RECOVERED APPROX 30 SECS LATER. LOST ONE AT A TIME. 1ST LOST CAPTS ASI AND ALT WITH RED XX THEN 5 SECONDS LATER LOST F/O ASI AND ALT WITH RED X`S THEN 25 SECS LATER ALL RETURNED. PURGED MAIN AND STBY PITOT STATIC SYSTEMS, NO LEAKS DETECTED. ALPS PERFORMED RVSM SCALE ERROR TEST OPS CHECKED GOOD ON MAIN PITOT STATIC SYS REF AMM 34-11-00.