As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING LANDING GEAR RETRACTION, AT THE INITIAL HANDLE MOVEMENT TO THE UP POSITION, A LOUD BANG CAN BE HEARD ALONG WITH A SHUTTER THAT COULD BE FELT THROUGHOUT THE CABIN. EVERYTHING WAS NORMAL DURING EXTENSION. R & R THE LT MLG ACTUATOR IAW MM 32-30-04. OPS & LEAK CHECKED GOOD.