Retrofit kits for replacing fuel quantity indicating systems on aircraft comprised of avionic sensors for detecting fuel quantity, namely fuel gauges, electrical terminal block rack assemblies, circuit breakers, light dimmers and electronic totalizers, electronic panel test switch assemblies, remote light dimmer units, cover plates for electric switches, and also featuring metal name plates, metal guard rails, metal clamps, cushioned support base, metal screws, metal rivets, metal spacers, me...