As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ATB - ON GEAR RETRACTION, LEFT AND RIGHT MAIN GEAR LIGHTS WENT FROM GREEN TO DARK. NOSE GEAR LIGHT WENT FROM GREEN TO RED AND REMAINED RED. LOUD NOISE HEARD FROM FLIGHT DECK. QRH COMPLETE, GEAR EXTENDED AND SHOWED THREE GREEN. FOUND NLG CYLINDER SUPPORT FITTING DAMAGE DUE TO UPPER BOLT MISSING. REMOVED AND REPLACED NLG CYLINDER SUPPORT FITTING (P/N 5912386-501) PER DRAWING 9911509 AND 9910073 AND SRM 51-40-03. OPS CHECK AND LEAK CHECK OK.