As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT LOST THE LEFT SYSTEM HYDRAULIC QUANTITY DURING CLIMB-OUT OF IAH. THE AIRCRAFT WAS RETURNED TO IAH WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND THE NR 1 ENGINE THRUST REVERSER CONTROL VALVE HYDRAULIC LINE RUPTURED. THE HYDRAULIC LINE WAS REPAIRED. LEAK AND OPERATIONAL CHECKS WERE GOOD.