As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DESCENT, CREW REPORTED A-HYDRAULIC SYSTEM PRESSURE INDICATION PROBLEM. THE ABSENCE OF HYDRAULIC PRESSURE INDICATION, PROMPTED THE CREW TO DO A MANUAL EXTENSION OF THE LANDING GEAR. CREW CONTINUED ON WITH THE FLIGHT. AIRCRAFT LANDED COS WITHOUT FURTHER INCIDENT. COS MX REPLACED THE PROXIMITY SENSOR ELECTRONIC UNIT IAW DORNIER MM JIC 32-61-12 OPERATIONAL CHECK WAS SATISFACTORY.