# SDR ASAA2020103033457

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 30, 2020
- Submitted: November 3, 2020
- Operation: Air carrier
- Aircraft: [N402AS](https://openairdocs.org/aircraft/N402AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41189
- Aircraft time: 29,815 hours, 9,653 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Condition: Failed
- 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/ASAA2020103033457

## Discrepancy

LEFT FMC FAILED MULTIPLE TIMES.  RAN CHECKLIST WHICH HAD US SWITCH FMC SOURCE TO RIGHT FMC.  GROUNDED-YES.  PERFORMED FMC RESET PROCEDURE, REF B737-900 FIM 34-61 TASK 836, INTERMITTENT FAULT.  PERFORMED FMC BITE, REF FIM 34-61 TASK 801, NO FAULTS NOTED.  OK FOR SERVICE.  FMC SOURCE SELECTOR RETURNED TO NORMAL.

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