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An A319 crew experienced a dual FMGC lockup in-flight. Normal functioning was restored after the crew completed the irregular procedure.
| Attributes | |
| ACN | 861080 |
| Time | |
| Date | 200911 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.ARTCC |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | A319 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | FMS/FMC |
| Person 1 | |
| Function | Check Pilot Captain Pilot Flying |
| Experience | Flight Crew Last 90 Days 200 Flight Crew Total 25000 Flight Crew Type 7000 |
| Person 2 | |
| Function | First Officer Pilot Not Flying |
| Experience | Flight Crew Last 90 Days 150 Flight Crew Total 9500 Flight Crew Type 2500 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
The following information is filed about and pertains to this flight's partial loss of both FMGC's while enroute at cruise. For no apparent reason the captain's and the first officer's navigation displays went blank and both mcdu's froze; not accepting any inputs (although ACARS continued to work). The flight directors did not disappear and the autopilot did not disconnect. No ECAM appeared. I switched to standby navigation and informed ATC that we had lost RNAV capability and would require routing for standard navigation and was accommodated. The co-pilot sent a message to dispatch with the same information and sent a message to maintenance with the problem. All other systems appeared normal. Maintenance suggested the resetting the FMGC's one at a time as outlined in the irregualar procedure for both FMGC's failed (although not all the symptoms we had matched what was outlined in this procedure). The reset restored both navigation displays to their normal operation and both FMGC's to full function after a few minutes. We were in full VFR conditions the entire time and were expecting a visual approach on a almost cloudless day.
Original NASA ASRS Text
Title: An A319 crew experienced a dual FMGC lockup in-flight. Normal functioning was restored after the crew completed the irregular procedure.
Narrative: The following information is filed about and pertains to this flight's partial loss of both FMGC's while enroute at cruise. For no apparent reason the Captain's and the First Officer's NAV displays went blank and both MCDU's froze; not accepting any inputs (although ACARS continued to work). The flight directors did not disappear and the autopilot did not disconnect. No ECAM appeared. I switched to Standby Navigation and informed ATC that we had lost RNAV capability and would require routing for standard navigation and was accommodated. The Co-pilot sent a message to Dispatch with the same information and sent a message to Maintenance with the problem. All other systems appeared normal. Maintenance suggested the resetting the FMGC's one at a time as outlined in the Irregualar procedure for both FMGC's failed (although not all the symptoms we had matched what was outlined in this procedure). The reset restored both NAV displays to their normal operation and both FMGC's to full function after a few minutes. We were in full VFR conditions the entire time and were expecting a visual approach on a almost cloudless day.
Data retrieved from NASA's ASRS site as of April 2012 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.