As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOTH FMC'S UNABLE TO LINE SELECT 5L INTO SCRATCHPAD ON FIX PAGE, A BEAM ONLY. IN OTHER FMC PAGES, LINE 5L WORKS NORMALLY. ACFT GROUNDED. SPOKE WITH FLIGHT CREW UPON ARRIVAL. CAPT SAID IT STARTED WORKING AFTER HE WROTE IT UP, AND CONTINUED TO OP NORMAL. TESTS IAW AMM TASK 34-61-01-400-802 GOOD. GROUND VERIFICATION GOOD IAW AMM TASK 34-61-00-710-801.