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B747 captain reported continuing to the destination after experiencing dual FMC failure. One FMC was successfully recovered.
| Attributes | |
| ACN | 1481579 |
| Time | |
| Date | 201709 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | CZQX.ARTCC |
| State Reference | NF |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | B747 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | FMS/FMC |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Type 2426 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe |
Narrative:
After entering class ii airspace after radar service terminated we had a dual FMC failure. I immediately went back to the last VHF frequency we were working and the controller still had us on radar. We entered a holding pattern and completed the qrc. We did not pull and reset the circuit breaker as was optional in the checklist. Right FMC recovered after about 5 minutes. The left FMC did not recover. We coordinated with [dispatch; maintenance; and operation] and passenger advocacy. We all agreed the best course of action was to continue to destination.
Original NASA ASRS Text
Title: B747 Captain reported continuing to the destination after experiencing dual FMC failure. One FMC was successfully recovered.
Narrative: After entering Class II airspace after radar service terminated we had a dual FMC failure. I immediately went back to the last VHF frequency we were working and the Controller still had us on radar. We entered a holding pattern and completed the QRC. We did not pull and reset the CB as was optional in the checklist. Right FMC recovered after about 5 minutes. The left FMC did not recover. We coordinated with [Dispatch; Maintenance; and Operation] and passenger advocacy. We all agreed the best course of action was to continue to destination.
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.