As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 431 - MSY - THE LEFT HYDRAULIC SYSTEM FLUID QUANTITY AND PRESSURE DROPPED TO ZERO WHILE IN FLIGHT. THE AIRCRAFT LANDED AT MSY WITHOUT INCIDENT. MAINTENANCE FOUND THE NR 1 ENGINE DRIVEN HYDRAULIC PUMP CASE CRACKED. THE PUMP WAS REMOVED AND REPLACED. LEAK AND OPERATIONAL CHECKS WERE GOOD. (M)