Engineers have to work a "reasonable" amount of overtime. It 's in the agreement.
The company will always pull the "overtime ban " card at times like these if ALL staff cease working overtime. The practice should be a CONTROLLED amount of overtime.
This can be done by in house agreement so it somewhat satisfies those who will work no matter what, as after all, some is better than none, and it gets shared around.
Co -operation is what is needed..... Not confrontation.