As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON APPROACH WHEN FLAPS WERE SELECTED TO 15 DEG LOW HYD FLOW LT & RT CAUTION LIGHTS ILLUMINATED. THAT WAS FOLLOWED BY LOW HYD LEVEL AT AROUND THE SAME TIME THE FLAPS REACHED 15 DEG BECAUSE OF THE POTENTIAL FOR HYDRAULIC FLUID LOSS, AND EMERGENCY GEAR EXTENSION WAS PERFORMED. ITEM IS UNDER INVESTIGATION.