# SDR ASAA2021020934073

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 9, 2021
- Submitted: February 12, 2021
- Operation: Air carrier
- Aircraft: [N537AS](https://openairdocs.org/aircraft/N537AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35204
- Aircraft time: 34,093 hours, 9,922 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Condition: Malfunctioned
- Location: First Officer'S
- Stage of operation: CR
- 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/ASAA2021020934073

## Discrepancy

AT CRUISE ALT FL350, /O'S NAV DISPLAY SHOWED VTK MSG LIGHT ILLUMINATED AND INTERMITTENT SINGLE FMC OPERATION DISPLAYED ON MCDU. FOLLOWED QRH PROCEDURES AND HAD DUAL OPS RESTORED. GROUNDED - YES. VERIFIED FMC -R SHOWED A RE-SYNC IN FLT. OPS NORM R. FMC BITE CK OK REF B737-800 AMM TASK 34-61-00-860-801.

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