# SDR ASAA2021021134097

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 11, 2021
- Submitted: February 17, 2021
- Operation: Air carrier
- Aircraft: [N474AS](https://openairdocs.org/aircraft/N474AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 40715
- Aircraft time: 21,229 hours, 6,754 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Condition: Malfunctioned
- Location: Right
- Stage of operation: NR
- 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/ASAA2021021134097

## Discrepancy

RH FMC FAIL WITH VTK FLAG, PERFORMED QRH PROCEDURE, SYSTEM RESTORED ITSELF BEFORE FMC SWITCH MOVED TO "BOTH ON LEFT". GROUNDED - YES. PERFORMED B737-900 FIM 34-61 TASK 836 INITIAL EVALUATION CHECK GOOD. 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.