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:
- Preflight ground inspections are crucial for detecting slow fluid leaks by observing stains beneath the aircraft.
- Stain color indicates fluid type: red for hydraulic, dark and sticky for oil, and clear or light blue for fuel (which is also best detected on wing undersides).
- Pilots should monitor small oil stains, seek mechanic attention for growing stains or grease on propeller blades, and also look for fallen bolts or nuts indicating loose components.
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