As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ON DESCENT, HYDRAULIC QUANTITY WENT TO ZERO. 'A' AND 'B' HYDRAULIC SYSTEM PRESSURE WERE ALL NORMAL. ON FLAP AND THEN GEAR SELECTION, A AND B HYD PRESSURE FLUCTUATED MOMENTARILY. NO LOW PRESSURE LIGHTS CAME ON AT ANY TIME. PRESSURE REMAINED STEADY ON TAXI TO RAMP. FOUND HYD LINE IN NR 1 PYLON CHAFED AND LEAKING LINE REPLACED.