As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAX - FLT 1232 - EN ROUTE LAX-ORD, DETECTED LOUD VIBRATION AT NOSE LANDING GEAR. RETURNED LAX AND LANDED WITHOUT FURTHER INCIDENT. REPLACED NOSE LANDING GEAR DOOR LINK ASSEMBLY. ACCOMPLISHED LANDING GEAR SWING RETRACTION TEST. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)