As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT HYD SYSTEM INDICATES ZERO WITH LEFT SYSTEM PRESSURE AND PUMP PRESSURE LIGHTS ILLUMINATED. ALSO HAVE L REV STOW SIG AND L REV ISLN VAL MESSAGES WITH NO VIBRATION PER CREW. REPLACED RELAY AND OPS CHECKED REVERSER SEVERAL TIMES. FOUND NR 1 ENG THRUST REVERSER HYDRAULIC PRESSURE LINE BROKEN BENEATH STRUT FAIRING. REPLACED LINE.