As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI THE WARN ELEX STATUS MSGAPPEARED AND WON'T CLEAR, A/C RETURNED TO THE GATE AND MTX GROUNDED A/C AFETER TROUBLE SHOOTING WARN FLEX MSG IAW B767 FIM 31-51 FT 806 FOUND WARN FLEX PSU B FAULTING REMOVED AND REPLACED WARN FLEX PSU B IAW B767 AMM 31-51-04 WEU CARD MODULE TEST GOOD.AND RETURNED A/C TO SERVICE.