# SDR ASAA2019110761262

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 6, 2019
- Submitted: November 8, 2019
- Operation: Air carrier
- Aircraft: [N562AS](https://openairdocs.org/aircraft/N562AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35091
- Aircraft time: 50,160 hours, 14,925 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Condition: Malfunctioned
- Location: Captain'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/ASAA2019110761262

## Discrepancy

AT CRUISE ALTITUDE 3 HOURS INTO FLIGHT WITH A/P "A" SELECTED THE LEFT FMC FAILED AND CAPTAIN NAV DISPLAY SHOWED VTK, A/P "A" STOPPED FUNCTIONING, FMA WENT TO HEADING HOLD AND ALTITUDE HOLD. WE SWITCHED TO A/P "B" AND REGAINED LNAV AND VNAV FROM RIGHT FMC. CAPTAIN FMC ONLY DISPLAYED ACARS, ACMS AND CAT FROM THE MENU PROMPT. AFTER 30 SECONDS THE LEFT FMC BEGAN FUNCTIONING CORRECTLY AND WAS NORMAL THE REMAINDER OF THE FLIGHT. GROUNDED - YES. NO HISTORY-PERFORMED B737-800 FIM 34-61 TASK 836 LEFT AND RIGHT FMC'S NORMAL OK FOR SERVICE.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.