# SDR ASAA2022040437898

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 4, 2022
- Submitted: April 7, 2022
- 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: 1,737 hours, 540 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: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2022040437898

## Discrepancy

IN FLIGHT, BOTH FMC'S BLANKED FOR 30 SECONDS. VTK DISPLAYED THEN BOTH FMC'S RETURNED TO NORMAL. LOST VNAV/LNAV CAPABILITY-WAS RESTORED WITH FMC'S. NO FMC FAIL MESSAGES. GROUNDED - YES. MAINT MSG 34-69001 FOUND IN PRESENT LEG FAULTS. MAINT MSG 34-69001 WAS NOT ACTIVE. B737-9 IFIM TASK 34-61-00-810-836 COMPLETED AND FOUND TO BE AN INTERMITTENT FAULT.

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