1. The airplane is properly bonded from tip to tip and has an extremely low difference in potential from any given point in the plane.
2. The airplane is not properly bonded and has large resistances from front to back and side to side.
Over Current Protection Devices (OCPD) such as circuit breakers and fuses actually require a short and intense INCREASE in electrical current (a short) in order to detect the fault and cut the circuit off.