# SDR ASAA2021040734525

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 7, 2021
- Submitted: April 8, 2021
- Operation: Air carrier
- Aircraft: [N516AS](https://openairdocs.org/aircraft/N516AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 39044
- Aircraft time: 44,774 hours, 13,467 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Condition: Malfunctioned
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021040734525

## Discrepancy

CREW REPORT MOMENTARY FMC DROP. VTK ON NAV DISPLAY, LEFT SIDE. GROUNDED - YES. REF B737-800 FIM 34-61 TASK 836 RESET FMCS 1 & 2. NO FAULTS NOTED. VTK FLAGS NOT PRESENT. NO FURTHER ACTIONS REQUIRED AT THIS TIME. 2 MIG 51-A INSTALLED AND REMOVED.

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