As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) CREW NOTICED HYD FLUID ON THE SIDE OF FUSELAGE WILL REMOVING CARGO FROM AFT CARGO POD. INVESTIGATION OF THE ACFT FOUND A CRACKED BACK UP NUT ON THE LT MAIN GEAR ACTUATOR RETRACTION FITTING. BACK UP NUT REPLACED, SYS FLUID REPLENISHED AND GEAR SWINGS COMPLETED IAW AMM 12, 32.