As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMB OUT THROUGH 37000 FEET YELLOW HYD PRESS LOW RIGHT ICAS ILLUMINATED SEVERAL TIMES. SHORTLY AFTER THE HYD VOLUME LOW EICAS MESSAGE APPEARED. APPROPRIATE CHECKLISTS WERE COMPLETED. ***SUPPLEMENTAL INFORMATION: INSTALLED A NEW RT ENGINE HYDRAULIC PUMP PRESSURE LINE, IAW STANDARD PRACTICES MANUAL 20-10-05, AND MM 29-10-05-4. TUBE ASSY P/N-6957100-18