June 17, 2023.
I visited the Travel Town museum (located in Los Angeles, California).
As you probably know, the California Western Baldwin RS-12 #56 resides there.
A nice staff lady let me open the engine access doors and take some pics.
hood roof door
photo by: Jonas Racys
It appears that all the engine access doors are constructed from relatively thin sheet metal and then reinforced with channel shapes having an 'L' shaped cross-section.