# SDR ASAA2021060335042

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 3, 2021
- Submitted: June 7, 2021
- Operation: Air carrier
- Aircraft: [N477AS](https://openairdocs.org/aircraft/N477AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 40716
- Aircraft time: 21,278 hours, 6,690 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Display
- Condition: Intermittent
- Location: First Officer'S
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021060335042

## Discrepancy

FIRST OFFICER'S NAVIGATION DISPLAY INTERMITTENTEY SHOWS "VTK FLAG". GROUNDED - YES. VERIFIED FAULT, R/H FMC CYCLES ON & OFF. CYCLED BOTH FMC CMPTR C/B'S. ACCOMP. FMC BITE TEST RFMC SHOWS PGM FAULT, INTERMITTENT. ACCOMP. FMC SENSOR STATUS TEST ALL SHOW OK REF. B737-900 M/M 34-61-00-710-026 B737-900 FIM 34-61 TASK 801 & TASK 807. SEA/MC NOTIFIED ARNIE.

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