# SDR ASAA2021121136872

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 11, 2021
- Submitted: December 13, 2021
- Operation: Air carrier
- Aircraft: [N920AK](https://openairdocs.org/aircraft/N920AK), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 44086
- Aircraft time: 714 hours, 237 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Unknown
- Part number: UNKNOWN
- Condition: Unknown
- Location: Unknown
- Stage of operation: NR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021121136872

## Discrepancy

DUAL FMC FAILURE WITH VTK DISPLAYED AND ASSOCIATED FAILURE. THE SYSTEM RESET AUTOMATICALLY AFTER LESS THAN 1 MIN. GROUNDED - YES. CYCLED A/C PWR AND ALIGNED ADIRUS - FMC CK OUT GOOD NO VTK DISPLAYED. FMC SYS OPS NML IAW B737-9 AMM 34-61-00.

---
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.