As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT HYD SYS PRESS READ ZERO/QTY READ 16QTS WHILE, AIRBORNE 19QTS AT TAXI IN PRESS DROPPED TO ZERO SHORTLY AFTER SLATS WERE EXTENDED. ON ARRIVAL, BLED LT SYS HYD FOUND ABNORMAL AMOUNT OF AIR IN SYS. EXERCISED FLT CONTROLS AND BLED MORE AIR FROM LT SYS. RAN ENG AND PRESSURIZED LT AND RT HYD SYS. LT ENG PUMP PRESS NORMAL. RAN FLT CONTROLS AND CK OK.