During routine inspections, good technicians dig deep into the airframe looking for structural cracks. And if you’re doing even a causal preflight walkaround it’s not uncommon to find cracks around cowlings, windows and fairings. None of them should be ignored.
Surface cracking doesn’t usually mean a cowling or control surface will come apart, but it’s a clue that weather and vibration are taking a toll. Short of replacing major structural and cosmetic parts, quality repairs are possible and acceptable practice when using the right guidance. Here’s a short primer.