As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON INITIAL GEAR EXTENSION, GEAR DID NOT EXTEND. AUX/ALT HYDRAULIC PUMPS WERE ON. ENGINE HYDRAULIC PUMPS WERE HIGH HYDRAULIC PRESSURE / QUANTITY WERE NORMAL. AFTER APPROXIMATELY 20 SECONDS, CREW RECYCLED LANDING GEAR AND GEAR EXTENDED NORMALLY. FOUND EXCESSIVE WATER COMING FROM INSIDE THE GEAR DOORS. LUBRICATED GEAR AND DRAINED WATER. OPS CHECKED GOOD IAW DC-9 MM 32-30-00-2-0003. OPS CHECKED GOOD AND NO DEFECTS NOTED.