# SDR ASAA2021111536618

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 15, 2021
- Submitted: November 17, 2021
- Operation: Air carrier
- Aircraft: [N592AS](https://openairdocs.org/aircraft/N592AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35190
- Aircraft time: 50,150 hours, 14,905 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Unknown
- Part number: UNKNOWN
- Condition: Unknown
- Location: Unknown
- Stage of operation: NR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021111536618

## Discrepancy

FMC P/RST LIGHT AND VTK ON FO'S NAV DISPLAY SINGLE FMC OPERATION DISPLAYED ON FO'S FMC CDU. EXECUTED FMC FAIL QRH PROCEDURE. FMC - R POSITION DATA BLANK ON FOS PAG 3/3. AFTER 3 MINUTES FMC - R POSITION DATA RETURNED. SELECTED FMC BOTH ON L. DUAL FMC OPS RESTORED AFTER 10 MINUTES. GROUNDED - YES. C/W FIM PROCEDURE, INITIAL EVALUATION - FMC PROMPT SHOWS ON L & R MCDU MENUES. FAULT WAS INTERMITTENT & NO FURTHER ACTION REQUIRED. REF B737-800 FIM 34-61 TASK 807.

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