The result shows the enabled service life extension by performing a repair and their extended service lives for each technique. It is clear the load attraction by repair patch can greatly sustain fatigue crack growth, therefore leading to twice extended service life before the skin structure needs to be replaced, comparing to the live repair technique. By stop-drilling the pre-exist crack fronts, stop-drill repair is able to extend service life further by tolerating more fatigue damage in addition to sustaining new crack growth. Comparing to the small stop-drill hole, large damage-removal cutout further reduces stress concentration therefore slowing down fatigue damage accumulation and further extending service life. It is noted that not considering rivet holes could lead to overestimation on service life as fatigue damage is accumulated at those locations as well, leading to potential crack re-initiation.