As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
N643TX-250320-1 FO PFD INSTRUMENTS FROZE AT FL400. AIRSPEED INDICATIONS INCREASED TO 450KTS (NOT ACTUAL AIRSPEED). WITH ASSICIATED AURAL WARNING. MX C/A: DRAINED ALL STATIC PORTS AND PURGED PITOT/STATIC SYSTEM, OPS AND LEAK CHECKS NORMAL AT 40000 FT AND 200 KNOTS. REFERENCE C560XL AMM 34-90-10.