As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HYD 3 FAIL WHEN SLATS EXTENDED, HYD 3 OFF INTO MEM ALTERNATE GEAR EXTENSION USED HYD 3 WENT TO ZERO. FOUND RT AIL PRESS LINE LEAKING STEADY AT BRAZED FITTING JUST OTBD OF INBD AILERON ACTUATOR. REMOVED AND REPLACED NEW LINE USING 2 FITTINGS. REF MM 20-10-01-2. SERVICED AND BLED HYDRAULIC SYS 3 REF AMM 12-13-02-3. PERFORMED LEAK CHECK AT BOTH FITTINGS AND THE B-NUT GOING TO AIL ACTUATOR LINE.