As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT CREW REPORTED A LOSS OF HYDRAULIC PRESSURE WITH AN ASSOCIATED HYDRAULIC QUANTITY LOSS INDICATION. THE FLIGHT CREW PERFORMED EMERGENCY PROCEDURES. MAINTENANCE INSPECTED AND REPLACED THE SLOT CONTROL VALVE IAW DC-8 MM 27-80-00. OPS CHECKED GOOD.