iniBuilds Rolls Out A350 v1.2.5 for Microsoft Flight Simulator 2024 and 2020

iniBuilds has released v1.2.5 for its A350 Airliner in Microsoft Flight Simulator 2024 and 2020, with the new build focused on sharpening system accuracy, improving stability, and tightening up performance in the MSFS WASM environment. In its forum announcement published on April 22, 2026, the developer said the update includes under-the-hood work aimed at smoother operation and more reliable behavior, especially during complex, high-load scenarios.

According to iniBuilds, a major focus in this update was WASM performance and consistency. The team says it optimized memory handling, reduced unnecessary data copying in key systems, refined data access patterns to cut stack pressure, and added extra safety checks across critical memory pathways. The goal is simple: fewer WASM-related crashes and a more stable overall experience in the cockpit.

Beyond the deeper technical changes, v1.2.5 also delivers a broad round of fixes across the aircraft’s major systems. iniBuilds says the patch addresses areas including FMGS logic, flight guidance behavior, navigation predictions, and MCDU functionality, while also bringing updates to the EFB, sounds, and aircraft model. It is the kind of update many long-haul simmers love most, less flashy trailer material, more “let’s make the airplane behave better at FL370.”

The published changelog highlights a long list of systems fixes, including corrections to manual position time behavior, Direct To behavior, fix page issues, top-of-climb prediction, takeoff page field locking, fuel and load page behavior, altitude constraints on the ND, waypoint-bearing issues, missing top-of-climb markers in OP CLB, cruise altitude selection and flight phase logic, green dot speed mismatch, and vertical guidance timing with wind shift sensitivity. In short, this update takes a broom to a lot of the little gremlins that can make advanced airliner flying feel rough around the edges.

There is also a visual cleanup pass in the patch. iniBuilds says v1.2.5 fixes several art and model issues, including missing landing gear parts, an unanimated APPR button, the EVA command guard not opening, incorrectly mounted sun shades on the exterior model, and inverted rudder trim animation. The EFB also gets attention, with fixes for enroute map token loss in flight and a 403 error caused by a bad API call.

On the audio side, iniBuilds says the update restores the missing “retard” callout and fixes the absence of a windshear alert, two details that matter when immersion and situational awareness are part of the whole airliner ritual.

iniBuilds noted that testers have already reported noticeable improvements in performance and consistency, particularly in demanding scenarios, and the developer encouraged users to grab the update ahead of a busy Cross The Pond weekend. The update is available through the iniManager.

For A350 fans, v1.2.5 looks like a nuts-and-bolts maintenance release in the best possible sense. No fireworks, no confetti cannon, just a sturdier widebody and fewer reasons for your virtual long-haul to turn into a systems soap opera.