# SDR ASAA2019032128717

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 21, 2019
- Submitted: March 22, 2019
- Operation: Air carrier
- Aircraft: [N508AS](https://openairdocs.org/aircraft/N508AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35691
- Aircraft time: 40,585 hours, 12,153 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Unknown
- Condition: Malfunctioned
- Location: Cockpit
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2019032128717

## Discrepancy

MOMENTARY VTK ON CA SIDE NAV DISPLAY, BOTH CA AND FO NAV INFO DISAPPEARED FROM DISPLAYS, NO OTHER MESSAGES. A/T L/M DISPLAYED ABOVE N1 DISPLAYS FOR 20 MINS THEN DISAPPEARED AND SEEMED TO DISPLAY NORMAL. AUTOTHROTTLE WORKED NORMAL FOR REMAINDER OF FLIGHT. GROUNDED - YES. COMPLIED WITH FIM 34-61 TASK 836. ALL IND NML. PERF BITE CK ON RT AND LT FMC PER FIM 34-61 TASK 801 ALL IND NML. ETOPS GROUND VERIFICATION SUCCESSFUL.

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