# SDR UIEA2019052104257

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 19, 2019
- Submitted: May 21, 2019
- Operation: Air carrier
- Aircraft: [N486MC](https://openairdocs.org/aircraft/N486MC), registered now
- Make and model: Boeing 747-45EF
- Registry model: [Boeing 747-45EF](https://openairdocs.org/model/boeing-747-45ef) (OpenAirDocs)
- Aircraft serial: 30608
- Aircraft time: 83,618 hours, 15,196 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Unknown
- Condition: Malfunctioned
- Location: Cockpit
- Stage of operation: CL
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2019052104257

## Discrepancy

BOTH FMC'S DROPPED OFF LINE. TIMED OUT WITHIN SECONDS OF EACH OTHER.(<P>SWAPPED FMC-L AND FMC-R PER AMM 34-61-01/401. PERFORMED FMC-L AND FMC-R GROUND TEST PER AMM 34-61-00/501. ALL TEST PASSED. OPS CHECK NORMAL.</P>)

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