CSS News - July 23, 2025
Welcome to another edition of the CSS Weekly Blog where we keep you up to date with our latest developments.
We'd like to apologize for the deviation from the normal schedule, as the last few days have been incredibly busy for us here at CSS.

First of all, we are continuing to test and debug the MSFS 2024 version of the CSS 737. Expect more news to come!

SimMarket

We are proud to announce that we've teamed up with SimMarket to bring you another convenient way to purchase the CSS 737. All 3 License Options will be available for purchase, with a license key granting you access to the CSS 737 for your chosen period in the CSS Launcher.
Stay tuned for a SimMarket release announcement!

Winglets, Eyebrows and other bits

Something we've been teasing for a while are Winglets and Eyebrows, and we're eager to announce that they will be available in the next update for the CSS 737-500, along with other improvements.

Eyebrow windows were standard on all 737s up until 2005, so naturally all Classics came off the production line with them fitted. In the early 2000s, some airlines opted to have those windows plugged, since they were obsolete and a nuisance to pilots, with many pilots using whatever paper materials they could gather to cover them up and keep the sun out of their eyes. They can still be seen on many older airframes, however, and now you too will be able to experience that frustration!

The first Winglets for the 737 Classic were developed by Kawasaki and Aviation Partners Boeing in 2002, being introduced the next year on a 737-300. They are visually similar to the NG winglets, however they are designed slightly differently. Notably, since the 737 Classic Logo light is located in its wingtips, winglet-equipped airplanes do not have one. Also, similarly to the 757 and 767, the strobe light is located on the outer side of the winglet, as opposed to its root on the NG.

Both of these options are toggleable via the EFB, with provisions in place for them to be dictated by the livery config file.

Livery artists should know that these options incur a slight UV mapping change above the cockpit windows, along with new texture files for the winglets, so a new Paintkit version will be made available together with the coming update.

Additionally, Korry switch textures have been improved to better reflect what they look like in real life.

The 3D team is also working on Ground Power and Air Start Unit models, and hopefully we will be able to share some previews of them with you shortly.

Code wise, besides implementing the above options, we've fixed several Navdata issues and redone the DME arc logic, which previously sometimes resulted in poor system performance. Also, we fixed a bug where the default pushback tug would attach to the center of the airplane instead of the nosewheel.

Another weak point of our product for many users have been the Sounds, and while we can't say much at the moment, work on them is very well underway, and hopefully we will be able to deliver some very good results in the near future.

This update is promising to be a quite substantial one, and as always, we want our testing team to have a field day with it before releasing it to the public, but we can't wait for you to try it!

As always, we are continuously working to improve the CSS 737. Stay tuned for more!