# SDR ASAA2017122422991

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 24, 2017
- Submitted: December 26, 2017
- Operation: Air carrier
- Aircraft: [N440AS](https://openairdocs.org/aircraft/N440AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41705
- Aircraft time: 16,606 hours, 5,509 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Display
- Condition: Malfunctioned
- Location: Captain'S
- Stage of operation: CR
- How discovered: O
- Nature of condition: P
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2017122422991

## Discrepancy

AT FL350 CAPTAIN'S NAV DISPLAYED VTK FOLLOWED BY MAP FAILURE FLAGS.  NO FMC DATA ON CAPTAIN'S NAV DISPLAY AND NO FMC DATA ON BOTH CDUS. RESTORED ITSELF IN 1 MINUTE.  ACFT GROUNDED.  PERFORMED BITE CHECK FMC SYSTEM IAW AMM 34-61-801,  NO FAULT NOTED,  ACFT OK FOR SERVICE.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.