# SDR ASAA2020080312971

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 1, 2020
- Submitted: August 3, 2020
- Operation: Air carrier
- Aircraft: [N483AS](https://openairdocs.org/aircraft/N483AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36350
- Aircraft time: 18,873 hours, 6,041 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Condition: Malfunctioned
- Location: Left
- 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/ASAA2020080312971

## Discrepancy

MOMENTARY LEFT FMC FAIL. VTK ON CAPT NAV DISPLAY WITH NO FMC DATA ON FMC SCREENS. RECOVERED TO NORMAL OPS AFTER APPROX 30 SECONDS. GROUNDED - YES. FLIGHT 1 SHOWS "FMC-L, PRES POS LAT RATE". PERFORMED B737-900 FIM 34-61 TASK 824. NO FAULTS FOUND. ETOPS GRD VERIFICATION GOOD.

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