I did an inspection today on a 1969 mobile home with a FPE Stab-Loc electrical panel with aluminum wiring. As I entered one of the bedrooms, I turned on the light switch by the door. It controlled one of the wall outlets. After inspecting the room, I turned the switch off and noticed it was hot to the touch. The cover screws were almost hot enough to burn you. I shut the breaker off to this room.
I guess this is a perfect example of why we should write these panels up.