As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
"FMC DISAGREE" MESSAGE ILLUMINATED SEVERAL TIMES ON TAXI IN. GROUNDED - YES. L/H FMC SHOWS PGM FAULT REBOOTED L/H FMC & NORM OPS RESTORED OPENED & CLOSED 1 C/B. BITE TEST OK. REF B737-900 AMM 34-61-00-810-801 & B737-900 FIM 34-61 TASK 835 FOR FMC DISAGREE. GROUND ETOPS VERIFICATION OK.