# SDR ASAA2022122741261

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 27, 2022
- Submitted: December 28, 2022
- Operation: Air carrier
- Aircraft: [N594AS](https://openairdocs.org/aircraft/N594AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35191
- Aircraft time: 52,378 hours, 15,509 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Condition: Faulted
- 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/ASAA2022122741261

## Discrepancy

WENT INTO "SINGLE FMC OPERATION" IN SCRATCH PAD FOR ABOUT A MINUTE, AT CRUISE. IT KNOCKED US OUT OF VNAV/LNAV. ER REENGAGED MODES AND OPERATED NORMALLY. GROUNDED - YES. FMC-L RECORDED "PRES POS LAT-RATE" ON PREVIOUS FLT LEG, NO FAULTS NOTED ON ADIRS-L BITE, FMS OPS NORMAL REF B737-800 FIM 34-61 TASK 824.

---
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.