Abstract. Degradation and failure of aircraft wiring insulation is of particular
interest which could lead to smoke and fire due to arcing. With two recent major air
accidents and hundreds of major incidents over the past twenty years, health
monitoring and sustainment of wiring, particularly for aging aircraft is a major
concern. The results of a technique based on TDR, using trains of successive pulses
is presented in this paper for detection of partial damage to insulation in electrical
wires and cables.