As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FELT SMALL THUMP IN FLOOR FOLLOWED BY LEVEL 2 ALERT, "RIGHT HYD QUANTITY LOW." COMPLETED NON-NORMAL CHECK LIST AND EXTENDED EMERGENCY GEAR EXTENSION LEVER (ALSO STOWED GEAR LEVER AS PER MX). REMOVED AND REPLACED LEFT MLG RETRACT ACTUATOR CYLINDER.