Sport Flight Instructor Helicopter - Simplified Flight Controls › II. Technical Subject Areas › Task A. Human Factors

FH.II.A.K1l

Knowledge

Symptoms, recognition, causes, effects, and corrective actions associated with aeromedical and physiological issues, including:

Dissolved nitrogen in the bloodstream after scuba dives

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Get a short, cited explanation of this element written from the FAA handbooks: the core idea, the numbers that matter, common test traps, and a quick self-check.

From the FAA library

Pilot's Handbook of Aeronautical Knowledge p. 17-19
Chapter 17: Aeromedical Factors › Health and Physiological Factors Affecting Pilot Performance › DCS After Scuba Diving
waiting time before going to flight altitudes of up to 8,000 feet is at least 12 hours after diving that does not require controlled ascent (nondecompression stop diving), and at least 24 hours after diving that does require controlled ... ascent (decompression stop diving). The waiting time before going to flight altitudes above 8,000 feet should be at least 24 hours after any scuba dive. These recommended altitudes are actual flight altitudes above mean sea level…
Aeronautical Information Manual p. 8-1-5
Chapter 8. Medical Facts for Pilots › Section 1. Fitness for Flight › 8-1-3. Hyperventilation in Flight
altitude decompression sickness due to evolved nitrogen gas can occur during exposure to reduced barometric pressure (i.e., low cabin pressure) associated with increased altitude and may lead to a serious inflight emergency. 2. The recommended wait time before going ... flight altitudes up to 8,000 feet is at least 12 hours after diving that did not require a controlled ascent (i.e., non-decompression stop diving), and at least 24 hours after diving that required a controlled ascent (i.e., decompression…
Pilot's Handbook of Aeronautical Knowledge p. 5-36
Chapter 5: Aerodynamics of Flight › Load Factors › Stalls
pull up following stall recovery, significant load factors are sometimes induced. These may be further increased inadvertently during excessive diving (and consequently high airspeed) and abrupt pull ups to level flight. One usually leads to the other, thus increasing ... load factor. Abrupt pull ups at high diving speeds may impose critical loads on aircraft structures and may produce recurrent or secondary stalls by increasing the AOA to that of stalling. As a generalization, a recovery from a stall made…
Pilot's Handbook of Aeronautical Knowledge p. 17-18
Chapter 17: Aeromedical Factors › Hydraulic Fluid › Altitude-Induced Decompression Sickness (DCS)
condition characterized by a variety of symptoms resulting from exposure to low barometric pressures that cause inert gases (mainly nitrogen), normally dissolved in body fluids and tissues, to come out of physical solution and form bubbles. Nitrogen is an inert ... exposed to decreased barometric pressures (as in flying an unpressurized aircraft to altitude or during a rapid decompression), the nitrogen dissolved in the body comes out of solution. If the nitrogen is forced to leave the solution too rapidly, bubbles…
Pilot's Handbook of Aeronautical Knowledge p. 17-9
Chapter 17: Aeromedical Factors › Health and Physiological Factors Affecting Pilot Performance › Diving or Rolling Beyond the Vertical Plane
Diving or Rolling Beyond the Vertical Plane This maneuver may produce extreme disorientation. While in straight-and-level flight, the pilot should sit normally, either with eyes closed or gaze lowered to the floor. The instructor pilot starts a positive…