# SDR YENA2026052000471

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 18, 2026
- Submitted: May 20, 2026
- Operation: Air carrier
- Aircraft: [N4073J](https://openairdocs.org/aircraft/N4073J), registered now
- Make and model: Airbus A321-271NX
- Registry model: [Airbus A321-271NX](https://openairdocs.org/model/airbus-s-a-s-a321-271nx) (OpenAirDocs)
- Aircraft serial: 11129
- Aircraft time: 13,014 hours, 1,952 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Part number: C13207DA08
- Part serial: C13207015468
- Condition: Faulted
- Location: Zone 100
- Part time: 11,147 hours, 1,677 cycles
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/YENA2026052000471

## Discrepancy

FLT # 20, LHR-JFK. (ETOPS)  MCDU ENROUTE SHOWED EROUNIOUS ALTITUDE-SPEED-FUEL COMPARISONS- RESET SUCCESSFULLY PERFORMED PER RESET GUIDE FCOM VOL1 AND THAT WAS MCDU#1; NOTED BY MX, R&R FMGC NR 1 AS PRECAUTIONARY REF MM 22-83-34, XLOAD & OPS CHK OK SEE LP 4419020 FOR CAT III".

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