As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HYD 3 QTY LO HYD 3 ELEV OFF. EMERGENCY DECLARED. A/C MAINTAINED A #3 HYD SYSTEM QTY OF 5.0 GAL OR BETTER FOR MOST OF THE FLIGHT. UNTIL LANDING GEAR LEVER WAS PLACED INTO THE DOWN POSITION THEN HYD QTY DROPPED TO 2.3 GAL. FOUND PERMASWEDGE UNION LEAKING ON LINE IAW EA 1-3230-T0377535 PT 1 PERFORMED TEMPORARY REPAIR TO MPN AYK7550-585 USING RAW STOCK PIPING 304X1-2X035. PERFORMED LEAK CHECK OF REPAIRED AREA. OPS CHECKED GOOD.