In this episode, we dive into one of the most deceptive and potentially dangerous failure modes in light aircraft: pitot-static system blockages. Moisture, ice, dirt, or even a well-placed insect can quietly compromise the very instruments you rely on for airspeed, altitude, and vertical trend awareness.

We’ll break down exactly how these blockages occur, what they do to each instrument, and—most importantly—how to recognize the difference between a simple pitot blockage and a full pitot-and-drain-hole obstruction. You’ll learn why a blocked pitot can make your airspeed collapse to zero, and how a fully trapped pitot system can trick your ASI into acting like an altimeter—with indications that increase during a climb and decrease during a descent, regardless of your real airspeed.

We’ll also explore static port failures, why they affect all three instruments simultaneously, and how a pilot can spot the telltale signs in flight. Finally, we’ll cover prevention and mitigation: smart preflight habits, proper use of pitot heat, and the procedures your POH/AFM expects you to follow.

If you’ve ever wondered what really happens when your aircraft’s pressure ports stop telling the truth, this episode will give you the clarity needed to recognize the symptoms and respond with confidence.