As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB, LOST MAIN SYS HYD PRES AND QTY TO AUX POS. RAN "LOSS OF HYD FLUID OR PRES" CK LIST. LANDED W/FULL FLAPS ON AUX PUMP. FOUND NR 3 ENG PRESS LINE CHAFED THROUGH. REMOVED AND REPLACED LINE AND CLAMP LEAK CK GOOD REF LP 625876/ITEM 2/3.