As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAXI IN WE NOTICED WE LOST BOTH FMC'S AND ALL DATA. GROUNDED - YES. VERIFIED F/H FMC HAD A PGM FAULT, R/H FMC NO FAULTS LAST FLT. REF B737-800 FIM 34-61 TASK 801 & 807 ACCOMP FMC'S BOTH C/B CYCLING OPEN & CLOSED. ACCOMP SENSOR TEST, BOTH FMC'S SHOW OK REF B737-800 AMM 34-61-00-710-026.