# SDR ASAA2020022873308

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 27, 2020
- Submitted: February 28, 2020
- Operation: Air carrier
- Aircraft: [N435AS](https://openairdocs.org/aircraft/N435AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 43292
- Aircraft time: 25,204 hours, 8,093 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Condition: Malfunctioned
- Location: Left
- Stage of operation: CR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2020022873308

## Discrepancy

LEFT FMC VTK FLAG APPEARED. LOST LEFT FMC SWITCHED TO RT FMC ONLY FOR NORMAL OPS. AFTER 1 MINUTE PLACED FMC SWITCH BACK TO NORMAL. OPS NORMAL FOR REMAINDER OF FLIGHT. GROUNDED - YES. PERFORMED B737-900 FIM 34-61 TASK 836 & NO FAULTS FOUND. GROUND FUNCTIONAL CK GOOD.

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