As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LANDING GEAR WOULD NOT EXTEND WITHOUT USING EMERGENCY HAND PUMP. FOUND HYD LEAK AT LT HYD FILTER ASSY. O-RING WAS BLOWN AND UPON REMOVING FILTER BOWL, THREADS ON FILTER BOWL WERE FOUND BROKEN. SUSPECT CAUSE THREADS SEPARATED FROM METAL FATIGUE OR OVERTORQUING.