# SDR ASAA2016082917842

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 29, 2016
- Submitted: August 31, 2016
- Operation: Air carrier
- Aircraft: [N434AS](https://openairdocs.org/aircraft/N434AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 61620
- Aircraft time: 1,843 hours, 561 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Condition: Malfunctioned
- Stage of operation: DE
- 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/ASAA2016082917842

## Discrepancy

DUAL FMC FAILURE WITH VTK ON CAPTAINS SIDE AT 18500 FT ON ARRIVAL.  BOTH MAPS FAILED FOR APPROXIMATELY 30 SECONDS.  FMC AND MAPS RESTORED TO NORMAL OPERATION WITHOUT CREW ACTION, LNAV AND VNAV REMAINED NORMAL.  ACFT GROUNDED.  ACCOMPLISHED BOTH FMC SYSTEM BITE TEST PROCEDURES IAW FIM 34-61 TASK 801 AND BOTH FMC OPS CHECK NORMAL. NO EXISTING FAULT.

---
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.