As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT NOT GROUNDED: PILOT REPORTS BOTH FMCS WENT BLANK VTX FLAG CAPTS AND FOS NAV. LND ALT FLAG CAPTS & FOS PFD. RETURNED TO NORMAL AFTER 30 SECONDS. MAINTENANCE TROUBLSHOT SYSTEM IAW FIM 34-61-00. FAULT NOTED-FMC-L PRES POS LAT. ACCOMPLISHED FMCS OPS TEST IAW AMM 34-61-00. FMCS OPS CHECK NORMAL.