As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING LANDING CREW REPORTED LOSING HYD SYSTEM 1 AND HAD PROBLEM GETTING GEAR DOWN AND LOCKED. AN EMERGENCY WAS DECLARED AND AIRCRAFT WAS LANDED SAFELY. AIRCRAFT WAS TOWED TO THE GATE FOR MAINTENANCE. MAINTENANCE REMOVED AND REPLACED THE NR 4 HYDRAULIC PUMP IAW EMB MM. OPERATIONAL AND LEAK CHECKS WERE GOOD AND AIRCRAFT WAS RETURNED TO SERVICE. (M)