PLT329: Cabin Pressure Physiology
What code PLT329 covers, why the FAA tests it, and how to study Cabin Pressure Physiology before your checkride.
Recall physiological factors - cabin pressure
What this means for your checkride
At high cabin altitudes the reduced air pressure lowers the oxygen available to the body, which can cause hypoxia. If a pressurized cabin loses pressure, a decompression exposes occupants to the thin outside air and the useful time of consciousness drops sharply with altitude. This is why supplemental oxygen and prompt descent are required responses.
Pilots must recognize the physiological effects of altitude and pressure loss and respond before performance degrades.
Students may not realize hypoxia symptoms are subtle and can impair judgment before the pilot even notices a problem.
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.