What was found
DURING CRUISE VTK FLAG APPEARED MOMENTARILY ON FIRST OFFICER NAV DISPLAY DISAPPEARED AFTER 20 SECONDS. NO OTHER LOSS OF LNAV & VNAV OR FMC. GROUNDED - YES. PERFORMED B737-9 FIM 34-61 TASK 836 & RT FMC OPS NORMAL.
- Difficulty date
- October 16, 2023
- Submitted
- October 17, 2023
- Operation
- Air carrier
- Aircraft
- N491AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 44109
- Aircraft time
- 29,557 hours, 9,222 cycles
- System (JASC)
- 3460 · Flight Management Computing Hardware System
- Part
- Unknown
- Part number
- UNKNOWN
- Condition
- Unknown
- Location
- Unknown
- Stage of operation
- CR
- How discovered
- V
- Nature of condition
- J
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.