# SDR ASAA2017041820481

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 18, 2017
- Submitted: April 20, 2017
- Operation: Air carrier
- Aircraft: [N464AS](https://openairdocs.org/aircraft/N464AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 40714
- Aircraft time: 11,837 hours, 3,854 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Condition: Malfunctioned
- 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/ASAA2017041820481

## Discrepancy

DURING CRUISE,  FMC P/RST ILLUMINATED, ALONG WITH VTK ON F/O'S DISPLAY. LNAV AND VNAV DISCONNECTED. SWITCHED TO A AUTOPILOT AND INDICATIONS DISAPPEARED AND SYSTEM RETURNED TO NORMAL AFTER ABOUT 30 SECONDS. OPERATED NORMALLY FOR THE REST OF THE FLIGHT.  ACFT GROUNDED.  NR 2 FMC LOGGED ONE FAULT LAST FLIGHT - SYSTEM OPS OK.

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