As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDIS 880 31-50 3973 24APR23 MEM FACT U VMO GEAR DOWN STATUS MESSAGE. RETURNED TO MEM DUE TO UNABLE HIGHER ALTITUDE/AIRSPEED. FACT 24APR23 08:02 MEM U AMM: 27-32-01-4 FIM: 31-51-00-810-957 TROUBLESHOT VMO GEAR DOWN MESSAGE PER B777 FIM 31-51-00-810-957 AND FOUND ALTERNATE GEAR DOWN DISPATCH SWITCH IN THE VMO POSITION, SET SWITCH TO THE NORMAL AND SAFETIED PER B777 AMM 27-32-01-4, A/C OK FOR SERIVCE.