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B767 captain and dispatcher reported the flight returned to departure airport after experiencing dual FMC failure.
| Attributes | |
| ACN | 1590423 |
| Time | |
| Date | 201811 |
| Local Time Of Day | 1801-2400 |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Make Model Name | B767-300 and 300 ER |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | FMS/FMC |
| Person 1 | |
| Function | Pilot Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Person 2 | |
| Function | Dispatcher First Officer Pilot Not Flying |
| Qualification | Dispatch Dispatcher Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe |
Narrative:
On departure both mcdc's frozen; unable to manipulate any navigation functions via FMS. Went into holding; through company maintenance coordination reset circuit breakers. Returned [to departure airport]; no assistance needed on ground. Uneventful return.
Original NASA ASRS Text
Title: B767 Captain and Dispatcher reported the flight returned to departure airport after experiencing dual FMC failure.
Narrative: On departure both MCDC's frozen; unable to manipulate any NAV functions via FMS. Went into holding; through company maintenance coordination reset circuit breakers. Returned [to departure airport]; no assistance needed on ground. Uneventful return.
Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.