As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON GEAR RETRACTION, GEAR MADE A LOUD BANG THAT SHOOK THE ACFT. ALL GEAR POSITION LIGHTS DISPLAYED NORMAL OPERATION. ON EXTENSION, A METAL TO METAL SLAP SOUND CAME FROM NOSE GEAR, OTHERWISE GEAR FUNCTIONED NORMALLY. R & R THE NLG ACTUATOR IAW MM 32-30-03. OPS & LEAK CHECKED GOOD.