# SDR ASAA2020100633291

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 6, 2020
- Submitted: October 9, 2020
- Operation: Air carrier
- Aircraft: [N471AS](https://openairdocs.org/aircraft/N471AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41703
- Aircraft time: 23,188 hours, 7,401 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Part number: 1762000101
- Part serial: 009185
- Condition: Failed
- Location: Captain'S
- Part time: 23,196 hours, 7,396 cycles
- 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/ASAA2020100633291

## Discrepancy

CAPTAINS' FMC FAILED ABOUT 2:20 INTO FLIGHT.  RAN QRH AND RE-ESTABLISHED DUAL FMC OPERATION.  FAILED AGAIN ABOUT 25 MINUTES LATER.  CONTINUED WITH SINGLE FMC OPERATION.  GROUNDED-YES.  R & R FMC1, REF B737-900 AMM 34-61-02.  OPERATIONS CHECK GOOD.  SOFTWARES MATCH WITH FMC 2.  NO DEFECTS NOTED AT THIS TIME.  OP PROGRAM 556909-001 VERIFIED AND GOOD.

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