As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH - FLT 0777 - THE A-HYDRAULIC SYSTEM QUANTITY WAS LOST ON LANDING AT IAH. MAINTENANCE FOUND THE INBOARD FLAP DRIVE POWER UNIT HYDRAULIC FLAP MOTOR HOUSING CRACKED. THE HYDRAULIC MOTOR WAS REMOVED AND REPLACED. IN ADDITION, BOTH THE NR 1 AND NR 2 ENGINE DRIVEN HYDRAULIC PUMPS WERE REMOVED AND REPLACED. THE HYDRAULIC SYSTEM WAS SERVICED AND OPERATIONAL AND LEAK CHECKS WERE GOOD. (X)