PLT536: Physiological Factors
What code PLT536 covers, why the FAA tests it, and how to study Physiological Factors before your checkride.
Recall physiological factors - dehydration / heat stroke
What this means for your checkride
Dehydration is the loss of body water, common in hot cockpits and at altitude where the air is dry, and it brings fatigue, headache, and slowed thinking well before you feel thirsty. Left unchecked in heat it can progress toward heat stroke, a medical emergency. The defense is drinking water regularly and managing cockpit heat.
Dehydration degrades judgment and alertness in ways pilots rarely notice, so the FAA tests its causes, its symptoms, and the habit of steady fluid intake.
Pilots wait until they are thirsty to drink. Thirst lags behind actual fluid loss, so by the time you feel it performance is already reduced; steady water intake, not caffeine or sugary drinks, is what prevents it.
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.