Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 60; Flight Crew Total 22000; Flight Crew Type 7000
Aircraft Equipment Problem Critical
Flight Crew Diverted; General Declared Emergency; General Maintenance Action
Aircraft
Shortly after takeoff both MCDU's locked out. We lost all navigation ability. The course line on the map display disappeared; we could not select standby Nav; manually tune any frequencies; the autopilot would not engage and the FMS would not compute the proper airspeeds. We checked the QRH and AOM for guidance and realized we could not correct the problem. After checking the weather we declared an emergency and diverted because the weather there was VFR. Landed without incident. Maintenance corrected the issue and we continued to destination.
B717 crew experiences a dual MCDU lockout shortly after takeoff which cannot be corrected. The flight diverts to a suitable airport for maintenance; then continues to destination.