[Tommy]

My training as an engineer and pilot tells me that there is always a root cause for every problem. When the same part fails more than once, there is usually some deeper root cause at work (e.g., poorly designed or constructed part, inadequate part for the application, incorrectly installed part, stress placed on failed part by some other incorrect part, etc.). If I don't fully understand why the part failed, I accept that it is very likely that the new part will fail also.

Sometimes I find that the root cause is harder or more expensive to fix than the part that failed. Tires and mechanical points fall into that category. In that case the failed part is considered worn out rather than faulty. Or like DanEC, I simply accept the problem as less troubling than the solution.

I've had cases where I thought I understood the root cause and it turned out I was wrong. But even in those cases, I ultimately discovered what was really happening. I don't subscribe to the concept that some problems cannot be fixed. ... I do subscribe to the position that, as in politics, for every problem there is a solution that is quick, easy, cheap and wrong.