# SDR ASAA201904229081

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 20, 2019
- Submitted: April 22, 2019
- Operation: Air carrier
- Aircraft: [N562AS](https://openairdocs.org/aircraft/N562AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35091
- Aircraft time: 48,101 hours, 14,305 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Condition: Malfunctioned
- Location: Captain'S
- Stage of operation: NR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA201904229081

## Discrepancy

VTK ON CAPTS ND, MCDU WENT TO THE MENU SCREEN, ALT INFO DISAPPEARED ON CAPT PFD. RESET AFTER 30 SECONDS. APPEARED TO BE A LEFT FMC FAILURE EXCEPT LNAV/VNAV NEVER DISENGAGED. GROUNDED - YES. REF B737-800 FIM 34-61 TASK 801, PERFORMED FMC BITE TEST AND FOUND NO CURRENT FAULTS. REF FIM 34-61 TSK 836 FOUND TO BE INTERMITTENT FAULT. A/C OK FOR SERVICE.

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