# SDR ASAA2023081344569

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 13, 2023
- Submitted: August 14, 2023
- Operation: Air carrier
- Aircraft: [N492AS](https://openairdocs.org/aircraft/N492AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 44110
- Aircraft time: 28,360 hours, 8,898 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: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023081344569

## Discrepancy

VTK DISPLAYED ON CAPTAIN'S NAVIGATION DISPLAY WITH LOSS OF FMC DATA ON CAPTAIN'S CDU. MAP WAS NOT DISPLAYED. AFTER 1 MINUTE NORMAL OPERATION ON CAPTAINS NAV DISPLAY AND CDU WAS RESTORED. LOSS OF FMC DATA ONLY ON CAPTAIN'S CDU. GROUNDED - YES. PERFORMED FMCS OPS TEST REF MM 34-61-00, NO DEFECTS NOTED. NO HISTORY 30 DAYS. ACFT OK FOR SERVICE. SEAMC DOUG NOTIFIED.

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