This is the comment I use when calling out a FPE panel.
The main electrical distribution panel is a Federal Pacific Electric FPE panel. These panels have a reputation for being problematic and further evaluation by a qualified electrician is recommended. FPE panel breakers are known to fail to trip at a much higher rate than standard panels. When a breaker fails to trip, the breaker and other components, including wires, may overheat and melt. The panel itself could overheat and catch fire. A qualified contractor should evaluate and replace as necessary.