Honeywell’s Product Support team has received operator reports of erroneous performance information, including incorrect Estimated Time Enroute (ETE), fuel calculations along with dashed out performance data on the flight plan page.
At this time, we have only seen this on the GV and GEX platforms with NZ6.1 software. An investigation is underway to identify root cause. Honeywell will evaluate what other aircraft may be affected as soon as root cause is established.
Below is an example of what the flight crews may see. The predicted speeds and altitudes should display, but in this case they are dashed out.
The image below on the left is what is observed when the issue occurs, note the *** which indicates there is an error. In addition, observe the difference in performance fuel calculations of +22.2 versus -0.4. The image to the right is the correct way it should display.
Both Bombardier and Gulfstream have been notified of the issue. Honeywell Product Support team has not seen any reports from other OEMs.
For more information or an update on this issue, contact the Technical Operations Center at 1-855-808-6500 (U.S. and Canada) or 1-602-365-6500 (Int'l) or:mailto: AeroTechSupport@Honeywell.com.