As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) HYDRAULIC PUMP WAS OBSERVED TO BE RUNNING CONTINUOUSLY WHILE TAXIING. HYRAULIC PUMP BREAKER PULLED AND THE AIRCRAFT RETURNED TO THE HANGAR AND PUT ON JACKS. HYDRAULIC RELIEF VALVE WAS FOUND TO GO INTO BYPASS AT LESS THAN 1200 PSI, RATING SHOULD ALLOW FOR 2250 PSI. NEW VALVE INSTALLED.