Slow leaks can be tough to catch during a preflight inspection. Most liquid filled containers are hidden behind the engine cowl or wheel wells. But if you pay attention to changes on the ground you can catch small leaks before they become major trouble.
What Can the Ground Tell You?
Key Takeaways:
- During preflight, meticulously inspect the ground beneath the aircraft for stains, as slow leaks are often hidden but leave tell-tale signs.
- The color of any stains indicates the type of fluid: red typically signifies hydraulic fluid, dark/sticky points to oil, while clear/light blue stains (best seen under wings) suggest fuel.
- Beyond fluid leaks, also check propeller blades for grease indicating a governor leak, and scan the ground for any fallen bolts or nuts from the aircraft.
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