# SDR IPXA2025060530739

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 4, 2025
- Submitted: June 5, 2025
- Operation: Air carrier
- Aircraft: [N632UP](https://openairdocs.org/aircraft/N632UP), registered now
- Make and model: Boeing 747-8F
- Registry model: [Boeing 747-8F](https://openairdocs.org/model/boeing-747-8f) (OpenAirDocs)
- Aircraft serial: 65775
- Aircraft time: 13,064 hours, 1,952 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fms
- Condition: Failed
- Location: Zone 100
- Stage of operation: DE
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA2025060530739

## Discrepancy

EMERGENCY DECLARED,  DURING DESCENT DUAL FMS FAILURE WITH MULTIPLE ADDITIONAL DISCONNECTS, FAILURE MESAAGES .LANDING ALT ADVISORY , FLIGHT CONTROL SYSTEM STS. AP AND AT FAILED BEGAN TO COMPLY WITH FMS NIL STATUS MESSAGE ON ARRIVAL. NIL EXISTING FAULTS IN CMC.MAINT MSG 34738 NOT ACTIVE IN PLF. FMC L AND FMC R CMC GROUND TEST PERFORMED IAW AMM 34-61-00-745-222.TEST PASSED NIL FAULTS.

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