As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER DEPARTING DFW EN ROUTE TO ASE, PROXIMITY SYSTEM FAIL LIGHT CAME ON ALONG WITH HYDRAULIC SYSTEM FAIL. PILOT RETURNED TO DFW AND LANDED WITHOUT FURTHER INCIDENT. UPON INSPECTION, THE PSEU BOX WAS FOUND TO BE FAULTY. REPLACED THE PSEU BOX. ALL SYSTEMS CHECKED NORMAL. AIRCRAFT WAS RELEASED FOR CONTINUED SERVICE.