As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON GEAR RETRACTION, A THUMPING NOISE WAS COMING FROM THE NOSEWHEEL COMPARTMENT ALONG WITH A FLASHING RED UNLOCK LIGHT. PERFORMED SEVERAL GEAR RETRACTIONS AND EXTENSIONS. SERVICED UPPER AND LOWER BARREL (STRUT) PRESSURES. ALL SYSTEMS OPS CHECK GOOD. IAW MM CH 32-20-00.