I was just watching aircrash investigation and this accident was on:
Nigeria Airways Flight 2120 - Wikipedia, the free encyclopedia
Now the tire caught fire, and was subsequently raised into the aircraft when the landing gear was raised. If the pilots had a camera aiming down at the wheels they could have seen the fire start. As it happened they didn't know what had happened and only realised there was a fire much too late. I know that Formula 1 car's have cameras positioned around the car and they are at optimum design for weight and aerodynamics and I'm sure they wouldn't have camera's fitted if it affected them, so why not aircraft?