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A350: 1.20: Perpetually banked when flying with crosswind in NAV mode

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Aircraft: A350-900 version 1.20

Simulator: MSFS 2024 SU4 on PC (Windows Marketplace installation)

Flight: RCTP -> RJBB

During the climb and after leveling off the aircraft flew on autopilot at a fixed bank angle when heading directly for a waypoint. Best guess is that it was trying to account for an 86-knot cross, tail wind. The wind was coming from about a 45-degree angle from the left, rear (aka captain's side) of the aircraft. See attached photo for more details.  This only happened consistently when the autopilot engaged in NAV mode. And more sporadically when in HDG mode.  Sometimes switching to HDG mode would cause the aircraft to assume wings-level flight. Other times not where it would maintain the same banked position.

I checked the fuel tanks to see if that would help explain this. Found that the fuel was balanced

As the flight progressed it was as if the aircraft assumed that the banked position was wings-level flight.  For example, attempting to turn in the direction of the perpetual bank led to extremely slow turns unless I took control and did a more extreme (40 degree+) bank.

A350-900 v1.20 Bank in NAV mode in tail crosswind.instruments.jpg

Edited by dragon8

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