As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB-OUT, HEARD LOUD BANG AND NOTICED C SYSTEM HYDRAULIC FAILURE, MANUALLY EXTENDED LANDING GEAR, LANDED WITHOUT INCIDENT. FOUND RIGHT MAIN LANDING GEAR RETRACT ACTUATOR WITH A CIRCUMFERENTIAL CRACK ON END OF CYLINDER AT ACTUATOR PISTON EXIT. REPLACED ACTUATOR OPERATION NORMAL.