# SDR AALA2019060439007

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 2, 2019
- Submitted: June 4, 2019
- Operation: Air carrier
- Aircraft: [N135NN](https://openairdocs.org/aircraft/N135NN), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 6520
- Aircraft time: 13,740 hours, 5,018 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Warning Message
- Condition: False Activation
- Location: Backup Nav
- Stage of operation: CL
- How discovered: O
- Nature of condition: N
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA2019060439007

## Discrepancy

AIRCRAFT WAS GROUNDED: PILOT DECLARED EMERGENCY ON ACCOUNT OF ON CLIMB OUT GOT XX ON GW FOLLOWED BY BACK UP NAV ON CAPT ND. - SECOND TIME THIS HAS HAPPENED  - FMGC 1 FAILURE. RETURNED TO HNL. MAINTENANCE PERFORMED FMGC 1 RESET IAW TSM 22-83-00. BACK UP NAV FAULT CLEARED. NO LOAD 15 REPORT GENERATED. OVERWEIGHT LANDING INSPECTION NOT REQUIRED AS IAW AMM 05-51-11...

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