PLT234: Axes and the Center of Gravity
What code PLT234 covers, why the FAA tests it, and how to study Axes and the Center of Gravity before your checkride.
Recall forces acting on aircraft - 3 axis intersect
What this means for your checkride
The airplane's three axes, longitudinal (roll), lateral (pitch), and vertical (yaw), all pass through one point: the center of gravity. That is why the CG is the balance point the airplane rotates around, and why its location affects control about every axis.
Understanding that the axes meet at the CG explains why loading affects handling, so the FAA tests the relationship between the axes and the center of gravity.
Pilots picture the axes meeting at the wings or the nose. All three intersect at the center of gravity, which is why moving weight fore or aft changes how the airplane responds about the axes.
Where to study it
A code on your test report is an area of deficiency. An authorized instructor must review it with you and endorse that review before you take the practical test, and the examiner may revisit it during the oral. Study it until you can explain it out loud, not just recognize the answer.