# SDR ASAA2013070495471

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 4, 2013
- Submitted: July 9, 2013
- Operation: Air carrier
- Aircraft: [N423AS](https://openairdocs.org/aircraft/N423AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 35206
- Aircraft time: 610 hours, 199 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Part number: 1762000101
- Part serial: 007762
- Condition: Failed
- Location: Ee Bay
- Part time: 610 hours, 199 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/ASAA2013070495471

## Discrepancy

IN CRUISE HAD DUAL FMC FAILURE, LEFT VTK AND MAP FLAGS. FOLLOWED QRH 11.30 RESTORED DUAL FMC OPERATION WITH FMC SWITCH BOTH ON R. FMC L BEARING AND DISTANCE INFORMATION DID NOT RESTORE.  ACFT GROUNDED.  RESET BOTH FMC IAW FIM 34-61, TASK 807. FMC-RT FAULT, RIGHT FMC LAST LEG AND GROUND FAULT IAW FIM 34-61, TASK 801.  NO FAULTS LT FMC.  REPLACED RIGHT FMC COMPUTER, REF MM 34-61-02 LOADED ALL REQUIRED SW INTO THE NEW FMC COMPUTER.  OPS CK NORMAL, REF MM 34-61-00.

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