# SDR ASAA2014012612498

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 26, 2014
- Submitted: January 28, 2014
- Operation: Air carrier
- Aircraft: [N517AS](https://openairdocs.org/aircraft/N517AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35197
- Aircraft time: 19,618 hours, 5,914 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Warning Message
- Condition: False Activation
- Stage of operation: NR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2014012612498

## Discrepancy

SINGLE FMC OPERATION ON SCRATCH PAD.  SEVERAL MINUTES LATER LNAV / VNAV DISSCONNECTED POS PAGE 3 SHOWED NO DATA FROM R-FMC.  FOLLOWED QRH SELECTED FMC BOTH ON LT CONTINUED NORMALLY.  NO VTX ON F/O SIDE (ONLY INFO ON R-FMC WAS POS PAGE NR 3).  ACFT GROUNDED.  PERFORMED FIM TK 34-61, TK 801, RT FMC OPS NORMAL. NO HISTORY. GROUND FUNCTIONAL CHECKED NORMAL. POS PAGES INDICATE NORMAL.

---
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.