As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT FMC FAILED IN FLIGHT AT FL400. GROUNDED-YES. FOUND NUMEROUS INSTANCES OF "FMC DATA INV" AND "NO FMC DATA" LOGGED IN CHANNEL B OF DFCS FAULT REVIEW ON THIS FLIGHT. REPLACED THE NR 2 FMC, PER B737-800 AMM 34-61-02/401. OPERATIONS CHECKS GOOD, PER SAME. FMC SWITCH PLACED BACK INTO THE NORMAL POSITION.