CSS News - December 31, 2025
Remember we said that we had a present on the way for you?
CSS 737-500 version 1.6.41 is now officially available in the CSS Launcher!

We strongly recommend a full reinstall of the CSS 737 for this update.
Please note that due to changes with the licensing process, older versions of the aircraft will not work. This update is mandatory.

Buckle in, because this massive update brings tons of changes, new features, and an all-new CSS Launcher!
It is truly a night-and-day experience compared to the previous version!

The All-New CSS Launcher

Sleek, modern and intuitive - welcome to the 2026 CSS Experience!
Serving as the first gateway into this update, the CSS Launcher has been redesigned from scratch, incorporating community feedback to make it visually appealing and easy to use.
The new CSS Launcher is now available via an automatic update to all CSS users.

Native FS2024 Compatibility

We've been hard at work implementing the native FS2024 project structure and fixing the numerous bugs that came up during the Experimental FS2024 period.
All of that is now done, and The CSS 737-500 is now officially fully compatible with FS2024! With the benefit of significantly improved graphics and performance, we hope you enjoy your CSS 737 flights in FS2024!
Due to the CSS 737 now unitilizing the native FS2024 file structure, current community-made liveries will need to be converted to the KTX2 format to work in FS2024. The official liveries are fully compatible.

New Features

This update comes packed with several new features. The airplane now has livery-specific engine ratings and winglet configs, together with a proper Winglet flight model. This means that there are now 3 variants of the 737-500: 18.5K, 20K and 20K with Winglets. All of them have their own performance characteristics and calculations.

We've also added new Stab Trim and Ground Roll sounds, and adjusted the existing sounds, so the airplane now sounds much better. This lays the foundation for a more substantial sound rework that will come in the future.

The EFB has been improved with lots of QoL additions, such as the Performance Calculator now automatically fetching proper aircraft model and registration. Additionally, we've added new panel states - Ready for Start and Ready for Taxi, for those who don't fancy starting the aircraft from cold and dark every single time.

VOR/LOC VOR, Go Around modes and VNAV Flap Target speeds have been added among several other system additions, and the RMI is finally fully operational.

System Fixes and Improvements

This update features countless bug fixes and system improvements of which there are simply too many to name. The FMC, VNAV, LNAV and Autopilot have all seen substantial rework and improvement, in addition to improvements to the flight model and system logic.
For example, the parking brake logic has been changed to reflect real life - you must hold the brake pedals, hold the parking brake lever, release the pedals and only then release the lever for the parking brake to engage. The speedbrake and ground spoiler logic has also almost entirely been rewritten.
All in all, the airplane feels, flies and sounds entirely different - polished, enjoyable and alive, laying a great foundation for the soon to come 737-300 and 737-400!

Model and Texture Fixes and Improvements

The model has, too, seen several improvements, both on the inside and outside. Both the Exterior and the Interior lighting have been improved, in addition to several small fixes to the interior and the exterior models - and the airplane looks absolutely beautiful!

We'd like to reiterate that our team is not stopping, and we are now shifting work on finalizing the 737-300 and 737-400, which will also become available very soon, along with our new pricing policy.

We want to thank you for your patience and support during these months of development. This is a start of an all-new CSS experience, and we can't wait for you to try it!

1.6.41 Changelog


-Aircraft performance table aligned with actual registration and engine rating
-Added 18.5K, 20K, 20K Winglet engine data
-Added new stab trim sounds
-Added new ground roll sounds
-Added Go Around modes
-Added VNAV approach flap setting target speeds
-Added EFB option for FO display FPS optimization
-Removed winglets configuration from EFB
-Introduced delay to DIR TO turns
-Fixed flap indicator going back to 0 after reaching Flaps 40
-Fixed CRZ WIND entry range
-Offset modified EHSI path push until path is complete
-Fixed incorrect stab trim movement with AP engaged
-Fixed missing ADF bearings on EHSI
-Improved glareshield shake effect
-Fixed SELECT DESIRED WPT screen showing several VORs with null coordinates
-Fixed LEGS first waypoint not matching RTE first waypoint
-Fixed distance based navaid sorting
-Fixed light panel switches cutout backlight missing
-Fixed CVR needle during test
-Fixed CTR getting hidden behind two altitude restrictions on LEGS page
-Fixed CLB N1 not matching FMC
-Fixed DIR TO causing an unreasonable turn
-Fixed PPOS waypoint appearing on EHSI after DIR TO
-Fixed RESET MCP ALTITUDE message appearing when it shouldn’t
-Fixed stab trim moving when switching views
-Fixed unresponsive brake pedals after autobrake disconnect
-Fixed T/O config warning triggered by speedbrake axis
-Disabled spoiler axis if armed using mouse or keyboard
-Fixed speedbrake handle moves randomly to stow position
-Fixed VNAV PTH to VNAV SPD change missing
-Fixed VNAV PTH late descent due to missing decel
-Fixed VNAV PTH no rate change with speedbrakes extended
-Fixed early TOD when reaching TOC during departure
-Fixed missing VNAV mode termination when flaps ectended beyond 15
-Adjusted VNAV PATH profile priotiy over speed
-Fixed objects with backlight having separate emissive component
-Adjusted static changeover altitude
-Fixed standby altimeter not working in MSFS2024
-Improved VNAV descent deceleration
-Fixed SID not clearing when changing departure airport in FMC
-Fixed POS INIT coordinates after recycling IRS
-Improved Autoland
-Improved Flaps lift & drag
-Adjusted Stall Warning Computer speeds
-Fixed green dot speed displaying above FL200
-Fixed autobrake disarming using toe brakes
-Fixed speedbrake handle animation in VC
-Fixed aircraft climbing above FMC cruise altitude
-Fixed LEGS page not displaying Mach numbers
-Fixed VNAV SPD climb target not matching FMC
-Fixed TOD after STAR re-sequence
-Fixed MSFS2024 lights not having spills
-Fixed waypoint disappearing when using direct to fix during departure
-Fixed vertical channel staying in FMC_PATH after altitude restriction removal
-Fixed VNAV commanding excessive V/S for path recapture
-Fixed MCP Mach displaying 0.60 when switching from VNAV
-Fixed MCP SPD mode not engaging with VS
-Fixed being able to select MCP SPD with LVL CHG
-Fixed MCP modes not deselecting
-Fixed ADF receivers not detecting signal
-Fixed RDMI ADF arrows not displaying bearings
-Fixed RDMI DME indicators showing 0 instead of dashes in ADF mode
-Fixed RDMI fail flags logic
-Fixed EHSI ADF pointers displaying VOR bearing instead of ADF
-Fixed EHSI VOR/APP mode not displaying CDI
-Fixed EHSI VOR/APP mode showing VNAV deviation instead of glideslope deviation
-Fixed MCP VOR/LOC mode not working for VOR
-Fixed VOR/LOC mode not working FROM VOR
-Fixed EHSI waypoints disappearing too early
-Fixed unable crz altitude message appears for the modified route
-Fixed thrust settings and FMC phase after missed approach
-Improved FMC Approach phase
-Improved EADI VMO/MMO barber pole movement with configuration changes
-Fixed flap setting being copied into scratchpad when selecting VREF
-Improved autopilot turn tracking
-Fixed LVL CHG using VNAV target altitude if engaged after VNAV
-Fixed ASP3 backlight linked to Aft Electronic panel
-Adjusted flight spoilers drag
-Fixed EFB Weather app filling both alternates in Alternate field if SimBrief computes 2 alternates
-Increased EFB pushback speed
-Fixed EFB pushback allowing selection of multiple directions at the same time
-Fixed Override Aircraft Configuration toggles Winglets
-Fixed Simbrief CFP cannot be displayed
-Fixed NAVIGRAPH app doesn't set airports value from OFP
-Fixed WEATHER app doesn't set airport value from OFP
-Fixed PERF app doesn't set current Aircraft type
-Fixed PERF app doesn't set current reg number
-Fixed GPU button missing
-Fixed Load button missing
-Fixed Unable crz altitude message appears for the modified route
-Fixed LEGS first waypoint missing if no departure runway selected
-Fixed Navdata out of date message with the latest Navigraph airac