tomorrow, October 27th, COM-1 Steam Boiler and COM-5 Cylinder Head (Express) will be offline between 8:15am - 9:45am UTC. They will be updated to version 3.3.6.
COM-3 Smoke Chamber will get some more fixes as well and will be offline between 8:15am - 9:15am UTC.
The changelog for COM-1 and COM-5 is the same one posted here.
Please keep in mind that due to unexpected issues, the maintenance might take longer.
COM-2 Firebox will get the update with the start of the next round.
Your Rail Nation Team