# SDR ASAA2020012982004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 28, 2020
- Submitted: January 30, 2020
- Operation: Air carrier
- Aircraft: [N477AS](https://openairdocs.org/aircraft/N477AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 40716
- Aircraft time: 18,715 hours, 5,899 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Condition: Malfunctioned
- Location: Left
- 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/ASAA2020012982004

## Discrepancy

LEFT FMC FAILED IN CRUISE FLT AT FL380. GROUNDED - YES. VERIFIED LH FMC FAILED. ACCOMPLISHED B737-900 FIM 34-61 TASK 807 TEST OF FMC, OKAY. FMC PROMPT IS NOW SHOWN ON MCDU PAGE. NO LH FMC FAILURE MESSAGE NOTED ON BITE TEST.

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