Hi, thanks for your response. But i have found the issue, after removing the Modular Missile Guidance(Experimental) from both my plane. Everything else seem to work fine and I can staged a 5 plane battle without them exploding randomly. Just to add on, I did what you say on taking a screenshot of the report in KSP and it did not tell me how it exploded itself. Also I can tell when the plane will explode itself when the plane suddenly changed its name to "unnamed". As you can see in the video, both my plane are unnamed, when I actually named them "interceptor" and "Multirole" accordingly.