 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
A319 flight crew experiences dual FMGC failures following 3 mcdu 'please wait' alerts. The FMGC's did reset after the circuit breaker procedure was complete.
| Attributes | |
| ACN | 793837 |
| Time | |
| Date | 200807 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzzz.airport |
| State Reference | FO |
| Altitude | msl single value : 23000 |
| Environment | |
| Flight Conditions | Marginal |
| Aircraft 1 | |
| Controlling Facilities | artcc : zzzz.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | A319 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | descent : approach descent : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Experience | flight time last 90 days : 270 flight time total : 11146 flight time type : 8046 |
| ASRS Report | 793837 |
| Events | |
| Anomaly | aircraft equipment problem : less severe |
| Independent Detector | other flight crewa |
| Resolutory Action | aircraft : equipment problem dissipated controller : issued new clearance flight crew : overcame equipment problem |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
While on descent into ZZZZ our mcdu's gave a 'please wait' message along with a change in lateral FMA from navigation to heading. They would correct themselves after 30 seconds and go back to normal. This occurred about 3-4 times. The next time it happened; the FMGC's did not recover and we received numerous ECAM's indicating dual FMGC failure. The captain took the aircraft and explained the situation to ZZZZ center; saying that we required radar vectors due to a navigation anomaly. I ran the several ECAM actions and went into the flight manual for dual FMGC failure. Per the procedure; we reset FMGC #1 circuit breaker followed by a reset of the FMGC #2 circuit breaker. After a min or two; both FMGC's were up and running. The checklist was completed after a couple of navigation accuracy checks. ATC was advised of our upgraded navigation condition but we were already on vectors and only 25 mi from the field. The flight ended uneventfully.
Original NASA ASRS Text
Title: A319 FLT CREW EXPERIENCES DUAL FMGC FAILURES FOLLOWING 3 MCDU 'PLEASE WAIT' ALERTS. THE FMGC'S DID RESET AFTER THE CIRCUIT BREAKER PROCEDURE WAS COMPLETE.
Narrative: WHILE ON DSCNT INTO ZZZZ OUR MCDU'S GAVE A 'PLEASE WAIT' MESSAGE ALONG WITH A CHANGE IN LATERAL FMA FROM NAV TO HDG. THEY WOULD CORRECT THEMSELVES AFTER 30 SECONDS AND GO BACK TO NORMAL. THIS OCCURRED ABOUT 3-4 TIMES. THE NEXT TIME IT HAPPENED; THE FMGC'S DID NOT RECOVER AND WE RECEIVED NUMEROUS ECAM'S INDICATING DUAL FMGC FAILURE. THE CAPT TOOK THE ACFT AND EXPLAINED THE SITUATION TO ZZZZ CTR; SAYING THAT WE REQUIRED RADAR VECTORS DUE TO A NAV ANOMALY. I RAN THE SEVERAL ECAM ACTIONS AND WENT INTO THE FLT MANUAL FOR DUAL FMGC FAILURE. PER THE PROC; WE RESET FMGC #1 CIRCUIT BREAKER FOLLOWED BY A RESET OF THE FMGC #2 CIRCUIT BREAKER. AFTER A MIN OR TWO; BOTH FMGC'S WERE UP AND RUNNING. THE CHKLIST WAS COMPLETED AFTER A COUPLE OF NAV ACCURACY CHKS. ATC WAS ADVISED OF OUR UPGRADED NAV CONDITION BUT WE WERE ALREADY ON VECTORS AND ONLY 25 MI FROM THE FIELD. THE FLT ENDED UNEVENTFULLY.
Data retrieved from NASA's ASRS site as of May 2009 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.