As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAP FLAG ON F/O'S DISPLAY LNAV/VNAV NOT AVAILABLE. GROUNDED - YES. VERIFIED LEFT FMC SHOWED FAIL IN FMC BITE RESET FMC COMPUTER FMC BITE IS NORMAL REF B737-9 MM 34-61-0. NO STATUS MESSAGES SHOW REF IFIM 31-98-00-810-803. SEAMC DAVE CONSULTED OK FOR SERVICE.