B737-800
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 397; Flight Crew Type 14000
Distraction; Human-Machine Interface; Troubleshooting
Aircraft Equipment Problem Critical
Flight Crew Overcame Equipment Problem
Aircraft; Human Factors
Dual FMC failure while at cruise for about 30 seconds. LNAV; VNAV; Autothrottle disengaged; FMC's went blank then returned without the option to select the FMC mode. Everything returned before we could even select a checklist. Reengaged all modes and they worked properly for the rest of the flight. Dispatch and Maintenance were both notified.
B737 Captain reported temporary dual FMC failure.