As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT HYDRAULIC ENGINE DRIVEN PUMP SOMETIMES WILL NOT DEPRESSURIZE IN FLIGHT. WORKED OK ON GROUND. HYD SYNOPTIC SHOWED EDP SWITCH OFF BUT SYSTEM DID NOT DEPRESSURIZE, SAME RESULT WITH FIRE HANDLE ON LAST FLIGHT. REPLACED WITH NEW SWITCH, TESTED OKAY. CHECKED WIRING AND CHECKED NORMAL. SWAPPED THE LEFT HYDIM CARD AND RIGHT HYDIM CARD & INSTALLATION TEST OKAY.