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A320 flight crew reports dual FMGC failure passing FL180 on climb out and elects to return to ZZZ when function cannot be regained.
| Attributes | |
| ACN | 790102 |
| Time | |
| Date | 200806 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | msl single value : 18000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zzz.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | A320 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | approach : visual |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Experience | flight time last 90 days : 180 flight time total : 9000 flight time type : 500 |
| ASRS Report | 790102 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 90 flight time total : 18000 flight time type : 2000 |
| ASRS Report | 790103 |
| Events | |
| Anomaly | aircraft equipment problem : less severe |
| Independent Detector | other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : landed as precaution |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
On normal VMC climb out from ZZZ we lost both map displays. I was PF; captain told me that both FMGC's had locked up. This was followed by cabin pressure ECAM. We completed ECAM for manual set of cabin pressurization. We were unable to get FMGC's to respond so we; upon agreement; notified ZOA that we needed vectors and would like to return to ZZZ. We made an uneventful landing after manually tuning ILS and setting speeds. Supplemental information from acn 790103: approximately FL180 in climb out of ZZZ; received following indications: map not available on both sides; please wait on both FMGC's; cabin pressure ECAM indicating manual climb altitude setting necessary; autoplt disengaged. Both FMGC's failed. We notified ATC of need to return to ZZZ and we were negative RNAV capable. Manually tuned ILS frequencys and received radar vectors to ZZZ followed by the visual. Manually set reference speed based upon fuel weight; zero fuel weight and referencing the aircraft manual landing section.
Original NASA ASRS Text
Title: A320 FLT CREW REPORTS DUAL FMGC FAILURE PASSING FL180 ON CLIMB OUT AND ELECTS TO RETURN TO ZZZ WHEN FUNCTION CANNOT BE REGAINED.
Narrative: ON NORMAL VMC CLBOUT FROM ZZZ WE LOST BOTH MAP DISPLAYS. I WAS PF; CAPT TOLD ME THAT BOTH FMGC'S HAD LOCKED UP. THIS WAS FOLLOWED BY CABIN PRESSURE ECAM. WE COMPLETED ECAM FOR MANUAL SET OF CABIN PRESSURIZATION. WE WERE UNABLE TO GET FMGC'S TO RESPOND SO WE; UPON AGREEMENT; NOTIFIED ZOA THAT WE NEEDED VECTORS AND WOULD LIKE TO RETURN TO ZZZ. WE MADE AN UNEVENTFUL LNDG AFTER MANUALLY TUNING ILS AND SETTING SPDS. SUPPLEMENTAL INFO FROM ACN 790103: APPROX FL180 IN CLBOUT OF ZZZ; RECEIVED FOLLOWING INDICATIONS: MAP NOT AVAILABLE ON BOTH SIDES; PLEASE WAIT ON BOTH FMGC'S; CABIN PRESSURE ECAM INDICATING MANUAL CLB ALT SETTING NECESSARY; AUTOPLT DISENGAGED. BOTH FMGC'S FAILED. WE NOTIFIED ATC OF NEED TO RETURN TO ZZZ AND WE WERE NEGATIVE RNAV CAPABLE. MANUALLY TUNED ILS FREQS AND RECEIVED RADAR VECTORS TO ZZZ FOLLOWED BY THE VISUAL. MANUALLY SET REF SPD BASED UPON FUEL WT; ZERO FUEL WT AND REFING THE ACFT MANUAL LNDG SECTION.
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.