# SDR ASAA2020121133678

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 11, 2020
- Submitted: December 15, 2020
- Operation: Air carrier
- Aircraft: [N513AS](https://openairdocs.org/aircraft/N513AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35192
- Aircraft time: 43,960 hours, 13,032 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Part number: 1762000101
- Part serial: 004127
- Condition: Failed
- Location: Right
- Part time: 43,960 hours, 13,032 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/ASAA2020121133678

## Discrepancy

RIGHT FMC FAILED IN FLIGHT AT FL400.  GROUNDED-YES.  FOUND NUMEROUS INSTANCES OF "FMC DATA INV" AND "NO FMC DATA" LOGGED IN CHANNEL B OF DFCS FAULT REVIEW ON THIS FLIGHT.  REPLACED THE NR 2 FMC, PER B737-800 AMM 34-61-02/401. OPERATIONS CHECKS GOOD, PER SAME.  FMC SWITCH PLACED BACK INTO THE NORMAL POSITION.

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