As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTS THUMPING NOISE UNDER FEET DURING CLIMB OUT. NO EICAS MESSAGES NOTED. CREW FOLLOWED QRH, DIVERTED AND LANDED WITHOUT INCIDENT. MAINT TROUBLESHOT AIRCRAFT AND FOUND RT NR1 MLG UPLOCK SENSOR AND NR1 PSEM MODULE FAILED. REMOVED AND REPLACED UPLOCK SENSOR AND PSEM MODULE. SYSTEM OPERATIONAL CHECK GOOD AND RETURNED AIRCRAFT TO SERVICE.