As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING CLIMB, RT HYDRAULIC SYSTEM PRESSURE DECREASED TO ZERO WITH APPROPRIATE EOHP ANNUNCIATOR LIGHT ILLUMINATED. AIRCRAFT LANDED BACK TO THE STATION. THE RT HYDRAULIC SYSTEM FILTERS REMOVED AND INSPECTED. NO CONTAMINATION FOUND. AIRCRAFT DISPATCHED IAW MEL 29-5. THE RT EDP WAS REPLACED ON THE FOLLOWING DAY TO RECTIFY THE DEFECT.