PLT475: Squall Lines
What code PLT475 covers, why the FAA tests it, and how to study Squall Lines before your checkride.
Recall squall lines - formation / characteristics / resulting weather
What this means for your checkride
A squall line is a narrow band of active thunderstorms, often forming ahead of a cold front, that can stretch for hundreds of miles. It packs the worst of thunderstorm weather, severe turbulence, hail, lightning, and wind shear, into a line that is usually too solid to fly through and too tall to top.
Squall lines are among the most hazardous weather a pilot can meet, so the FAA tests how they form, the weather they contain, and why the only safe choice is to stay well clear.
Pilots look for a gap to slip through. A squall line's cells build and dissipate quickly, so a gap can close before you reach it, and the turbulence between cells can be as violent as the cells themselves.
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.