Commercial Simulation Systems has released version 1.4.6 of its 737‑500 Classic for MSFS 2020 and 2024, introducing new features, system fixes, and an experimental 2024-compatible build.

The update delivers a wide array of improvements, including optional eyebrow windows, cosmetic winglets, refined flight model behaviour, updated lighting logic, and various fixes to avionics and electrical systems. The changelog also notes enhanced performance tuning and stability corrections.

Included in this release is an experimental build for MSFS 2024, made available at no additional cost to current MSFS 2020 customers. While functionally identical to its predecessor, the MSFS 2024 version additionally benefits from the simulator’s multithreading upgrades, although known issues, such as quiet audio and Walkaround Mode conflicts, remain.

The update also marks the debut of the 737‑500 on simMarket, where it is now available in three licence tiers. Each purchase comes with a key for activation in the CSS Launcher, providing parity with purchases from the developer’s storefront.

While the team advises those seeking a stable experience to continue using the MSFS 2020 build, ongoing development is underway to polish the 2024 release and expand system support.

Work is also progressing on sound improvements with help from a professional sound designer, as well as additional 737 variants.

The full changelog follows below:

1.4.6 Changelog‍‍

Added

- Optional eyebrow windows

- Optional winglets

- Optional fluorescent main panel lights

- Missing light emissions in virtual cockpit

- Livery-specific aircraft configuration options in aircraft.cfg

- Landing lights now light up gradually

Changed

- Fuselage texture mapping due to eyebrows

- Rewritten exterior lighting from scratch

- Improved stall behaviour at low speeds

- Adjusted red and yellow speeds

- Adjusted engine spool factors

- Adjusted engine degradation factors

- General engine performance improvements

- Fixed GND PWR AVAIL remains lit and GND PWR remains available even if GPU is disconnected

- Fixed minor winglet texture issue

- Landing light halo size scaled down

- Fixed default tug attaching to center of aircraft

- Fixed backlighting on pedestal light knobs

- Improved FMC path calculations

- Fixed CDU scratchpad failure when entering GW on PERF APP page

- Improved Korry textures

- AFDS flood light now has four lamps

- Fixed windshield rain effect direction

- Fixed MAP light knob animation

- Improved wing leading edge shape near wingtip

- Fixed some electrical systems being connected to incorrect busses

- Fixed GROUND POWER AVAILABLE light not illuminating without electrical power

- Fixed glareshield FIRE WARNING not illuminating during FIRE TEST

- Fixed Green Banana

- Fixed BAT Voltmeter not working without electrical power

- Fixed Auto Speedbrake only deploying middle spoiler section

- Top of Descent is no longer shown if no Arrival is entered

- Fixed yellow speed slowly moving up after entering initial GW

- Fixed lower collision light flash and spill not in sync

- [2024] Fixed jumping gauge needles

- [2024] Fixed lights disappearing when changing views

- Various FMC fixes and improvements

- Various small fixes

- Various small Navdata fixes

You can purchase the CSS 737 Classic via subscription for $5 per month or $50 per year, or as a one-time purchase for $120 through the CSS website, or via simMarket, for a slightly higher rate.

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