# SDR ASAA2017083121802

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 31, 2017
- Submitted: September 5, 2017
- Operation: Air carrier
- Aircraft: [N486AS](https://openairdocs.org/aircraft/N486AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 44107
- Aircraft time: 7,786 hours, 2,625 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Condition: Malfunctioned
- 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/ASAA2017083121802

## Discrepancy

LOSS OF LEFT FMC WITH VTK FLAG DISPLAYED AT FL340. BOTH FMCS RECEIVED WITH QRH PROCEDURE. NORMAL OPS.  ACFT GROUNDED.  NR 1 CDS LOGGED FMC DATA LOSS,  NO HISTORY TEN LEGS.  SYS TESTED GOOD IAW AMM 34-61-00-710-801.

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