As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON APPROACH INTO ATL, WHEN THE GEAR WAS EXTENDED THE ACFT LOST C-SYST HYD PRESS. ON INSPECTION FOUND RT MLG RETRACT ACTUATOR LOWER END BLOWN OUT AND THE GEAR DOOR WAS TORN OUT AT THE DOOR ACTUATOR ATTACH STRUCTURE. REPLACED DOOR AND ACTUATOR.