# SDR ASAA2015031210954

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 12, 2015
- Submitted: March 16, 2015
- Operation: Air carrier
- Aircraft: [N592AS](https://openairdocs.org/aircraft/N592AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35190
- Aircraft time: 27,334 hours, 8,475 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Warning Message
- Condition: False Activation
- Location: Fmc
- Stage of operation: TX
- How discovered: 9
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2015031210954

## Discrepancy

HAD "FMC DISAGREE" MESSAGE ON BOTH FMC'S ON TAXI OUT.  PERFORMED QRH PROCEDURE AND NO FURTHER FAULTS.  ACFT GROUNDED. ACCOMPLISHED FIM 34-61, TASK 835, FMC DISAGREE MESSAGE FAULT ISOLATION.  NO FAULTS FOR INFLT FAULTS FOR FMCS A & B AND ALL SENSORS SHOW OK FOR A & B. IAW STEP (D-2) FAULT WAS INTERMITTENT DUE TO NO FURTHER FAULTS NOTED.  NO HISTORY LAST 90 DAYS.

---
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.