As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF HEAVY NOISE VIBRATION EXPERIENCE. CYCLE GEAR SEVERAL TIMES WITH NO CHANGE, RETURNED TO FIELD. FUEL DUMPED PER ABNORMAL CHECKLIST. CHECKED NOSE GEAR DOOR LINKAGE IN ACCORDANCE WITH MM 32-22-2; OPERATIONS AND TESTED IN ACCORDANCE WITH MM 32-21-1. CLEANED AND LUBED IAW MM 32-21-1.