As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FIFTEEN MINUTES AFTER LEVEL OFF WE HAD A VTK ON CAPT PFD FOLLOWED BY MAP. IT CORRECTED ITSELF AFTER 30 SECONDS. GROUNDED - YES. OMF SHOWS NOT ACTIVE FOR MAINTENANCE MESSAGE, SHOWS INTERMITTENT FAULT. NO FURTHER MAINTENANCE REQUIRED. REF B737-9 FIM TASK 31-65-00-810-A03. NO HISTORY FOR PAST 90 DAYS UNDER CH 34 OR CH 31.