As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI IN BOTH FMC'S FAILED AFTER ABOUT ONE MINUTE THEY BOTH RESTORED TO NORMAL OPERATIONS. GROUNDED - YES. PERFORMED AMM TASK 34-61-00-860-801. BOTH FMC'S SHOW "PMG" FAULT. PER SAME TASK - CONSIDERED FLT OPERATIONS NORMAL-YET-NUISANCE CONDITION. OPS NML PER SAME.