# SDR ASAA2016040416239

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 4, 2016
- Submitted: April 6, 2016
- Operation: Air carrier
- Aircraft: [N408AS](https://openairdocs.org/aircraft/N408AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41732
- Aircraft time: 13,330 hours, 4,269 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Condition: Failed
- 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/ASAA2016040416239

## Discrepancy

IN CRUISE, THE CAPTAIN'S FMC FAILED.  DISPLAYED VTK ON CAPTAIN'S NAV DISPLAY AND NOT ON F/O'S DISPLAY.  IT RESOLVED ITSELF IN A FEW MINUTES.  5 MINUTES LATER ATC GAVE US DIRECT YKM.   TRIED TO ENTER THAT ON EITHER FMC AND GOT A SCRATCH PAD MESSAGE INVALID MOD ROUTE.  REENTERING THE ARRIVAL ROUTE 2 OR ROUTE 1 WOULD NOT WORK.  IT WAS STUCK ON A BEAM WAYPOINT PRIOR TO YKM AND COULD NOT PUT ANYTHING AHEAD OF THAT.  SELECTING FMC BOTH ON R ON TRANSFER SWITCHES ON OVERHEAD PANEL FIXED THE PROBLEM.  ACFT GROUNDED.  SWITCHED FMC TO NORMAL - BOTH OPS NORMAL.

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