# SDR ASAA2021060235002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 2, 2021
- Submitted: June 3, 2021
- Operation: Air carrier
- Aircraft: [N584AS](https://openairdocs.org/aircraft/N584AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35682
- Aircraft time: 50,301 hours, 14,890 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Condition: Faulted
- 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/ASAA2021060235002

## Discrepancy

DURING CRUISE VTK AND MAP FLAGS ON CAPTAINS MAP DISPLAY 2 MINUTES LATER AND PRIOR TO QRH PROCEDURE FLAGS WAENT AWAY AND A MAP FLAG APPEARED ON FO'S DISPLAY ALONG WITH SINGLE FMC OPERATION IN SCRATCH PAD. PERFORMED QRH AND FO'S DID NOT RESTORE. GROUNDED - YES. REF B737-800 FIM 34-61 TASK 836 CYCLED FMC C/B FMC OPERATIONS RETURNED TO NORMAL.

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