As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE AIRCRAFT LOST THE RT HYDRAULIC SYSTEM QUANTITY ON APPROACH TO IAH. THE AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND CHECK VALVE LEAKING IN RT WHEEL WELL AT LANDING GEAR CONTROL VALVE. THE LEAKING O-RING WAS REMOVED AND REPLACED, LEAK CHECKS WERE GOOD AND THE GEAR WAS CYCLED AS A PRECAUTION IAW MM 32-30-00.