PLT302: Jet Stream
What code PLT302 covers, why the FAA tests it, and how to study Jet Stream before your checkride.
Recall jet stream - types / characteristics
What this means for your checkride
The jet stream is a narrow band of strong winds near the tropopause, often 100 knots or more, marking the boundary between air masses. It shifts south and strengthens in winter. Its edges are a common source of clear air turbulence, and its winds strongly affect groundspeed and fuel at high altitude.
The jet stream drives high-altitude winds and turbulence, so the FAA tests its characteristics, location, and associated hazards.
Pilots think the jet stream is only a high-altitude curiosity. Its position sets cross-country winds and where clear air turbulence lurks, and flying its favorable or unfavorable side changes trip time and fuel significantly.
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.