# SDR ASAA2016011414828

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 14, 2016
- Submitted: January 20, 2016
- Operation: Air carrier
- Aircraft: [N402AS](https://openairdocs.org/aircraft/N402AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41189
- Aircraft time: 12,721 hours, 4,114 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Warning Flag
- Condition: False Activation
- Location: Fmc
- Stage of operation: CR
- How discovered: 9
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2016011414828

## Discrepancy

IN CRUISE, AT FL 270, 2 FMC "VTK" FLAG WAS DISPLAYED, WITH "CWS" ON FMA ROLL MODE. SWITCHED TO CAPTAIN ON AUTOPILOT AND MASTER, THEN "VTK" F/O FLAG DISAPPEARED AND NR 2 FMC RETURNED TO NORMAL OPS.  USED CAPT A/P AND FMC REMAINDER OF FLIGHT.  ACFT GROUNDED.  CREW STATED RT FMC  RECOVERED NORMAL,  OPS RT FMC,  OPS NORMAL REF AMM 34-61-00-710-801.  FMC TRANSFER SWITCH IN NORMAL POSITION.

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