Human Factors

Private Pilot (Airplane) • ACS Area I, Task H

The Private Pilot (Airplane) Human Factors Lesson Plan covers the knowledge, risk management, and skills associated with personal health, flight physiology, and aeromedical and human factors related to safety of flight.

Introduction

Introduction

  • Schedule

    Topic:
    Time:
    Attention/Motivator:
    0:05
    Part 1, Lesson Introduction:
    0:05
    Part 2, Aeromedical Factors:
    0:30
    Part 3, Fitness for Flight:
    0:15
    Part 4, Aeronautical Decision Making:
    0:25
    Part 5, Aeromedical Regulation:
    0:10
    Part 6, Human Factors Risk Management:
    0:10
    Part 7, Human Factors Guided Scenario(s):
    0:20
    Part 8, Lesson Conclusion:
    0:05
    Remotivation/Closure:
    0:05
    Total Ground Time:
    0:00

  • Attention Getter:

  • Motivator:

    • The most advanced aircraft is only as safe as the pilot flying it.
    • Many physiological hazards begin subtly, influencing perception, judgment, and performance long before a pilot recognizes the warning signs.
    • Understanding how the aviation environment affects the human body and learning to identify and mitigate these risks is an essential part of becoming a safe, proficient pilot.
    • Throughout this lesson, you'll explore the human factors that shape aeronautical decision-making and discover how recognizing these hazards before they become emergencies can make every flight safer.
Materials

Materials

Instructor Actions

Instructor Actions

  • Before the lesson, review reference materials.
  • Part 1, Lesson Introduction:
  • Part 2, Aeromedical Factors:
    • Connect symptoms, causes, and responses. (PA.I.H.K1)
      • Use a symptom-to-cause-to-action comparison for the aeromedical conditions in this lesson. Have the student explain recognition cues, likely causes, effects on pilot performance, prevention, and appropriate corrective actions rather than only define each condition.
      • Apply the comparison to the aircraft, altitude, occupant history, and conditions in the existing guided scenarios. Require the student to explain uncertainty when symptoms overlap and select a safe response without waiting for a definitive diagnosis.
    • Hypoxia. (PA.I.H.K1a)
      • Have the student define hypoxia and distinguish hypoxic, hypemic, stagnant, and histotoxic mechanisms with an example of each. Compare oxygen concentration with oxygen availability as altitude changes.
      • Have the student identify symptoms and contributing factors, explain their effect on judgment and performance, and distinguish time of useful consciousness or effective performance time from time to unconsciousness. Use a supplied altitude/exposure example without presenting a time estimate as a guaranteed safe interval.
      • Have the student explain prevention and the response to suspected hypoxia using the appropriate oxygen system, aircraft procedures, and a safe descent plan. Compare the FAA's nighttime supplemental-oxygen recommendation with regulatory oxygen requirements; emphasize that prevention planning must consider individual susceptibility and flight conditions.
    • Hyperventilation and overlapping symptoms:
      • Using the nervous-passenger climb scenario, have the student identify excessive ventilation and carbon-dioxide loss as the mechanism, recognize symptoms and performance effects, and explain how anxiety can worsen the condition.
      • Require a response that maintains aircraft control, calms the occupant, and returns breathing toward a normal rate and depth. Discuss overlapping hypoxia symptoms and why suspected oxygen deficiency must not be dismissed as anxiety; use appropriate oxygen and aircraft procedures when indicated. Do not practice impairment or breath-restriction techniques in flight.
    • Middle-ear and sinus pressure:
      • Have the student relate pressure changes during climb and descent to ear and sinus blockage, recognize symptoms and impairment, and explain prevention and corrective actions.
      • Have the student describe swallowing, yawning, and gentle pressure-equalization techniques, and explain why congestion that prevents equalization warrants postponement. Discuss when persistent symptoms require medical evaluation rather than continued flight or an assumed medication cure.
    • Motion sickness:
      • Have the student explain the sensory conflict, symptoms, performance effects, and prevention of motion sickness. Compare sensible preflight meal choices and passenger preparation with choices likely to worsen discomfort.
      • Use a passenger-discomfort example to select practical in-flight responses such as fresh air, an appropriate outside reference, and smoother maneuvering while maintaining aircraft control. Discuss when to discontinue the flight and why motion-sickness medication is not automatically acceptable for a pilot.
    • Carbon monoxide:
      • Use the existing recurring-headache scenario to explain carbon monoxide sources, impaired oxygen transport, symptoms, and incapacitation risk. Require the student to consider an aircraft exhaust or heater defect rather than assume ordinary fatigue.
      • Have the student identify detector indications and prevention measures, then explain the aircraft-specific checklist response, fresh-air and oxygen considerations, landing and medical-assistance decisions, and maintenance investigation before further flight. Do not rely on odor or improvement alone to exclude exposure.
      • Present a detector alert before symptoms develop. Require action without waiting for a headache; improvement in fresh air does not establish fitness or eliminate the need for medical and maintenance follow-up.
    • Hydration, nutrition, and cold exposure. (PA.I.H.K1j)
      • Have the student explain dehydration and inadequate nutrition: causes, recognition, effects on concentration and performance, prevention, and appropriate corrective actions. Use a hot ramp and missed-meal example to plan food, fluids, breaks, and a delay or landing when impairment is suspected.
      • Have the student explain hypothermia causes, warning signs, and effects on coordination and judgment. Use a cold or wet exposure example to plan protective clothing and shelter, prevention of further heat loss, and a safe flight or medical-assistance decision rather than continuing while impaired.
      • Have the student recognize that shivering and deteriorating dexterity are warning signs even when the pilot reports feeling alert. If cold persists, prioritize a precautionary landing and appropriate assistance; do not use a heater suspected of carbon-monoxide contamination.
    • Flying after scuba diving:
      • Have the student explain how residual dissolved nitrogen and reduced pressure create decompression-sickness risk for pilots and passengers, and identify symptoms that call for urgent assistance.
      • Use the current FAA AIM scuba guidance to compare flights up to 8,000 feet after non-decompression-stop dives (at least 12 hours), after decompression-stop dives (at least 24 hours), and flights above 8,000 feet after any dive (at least 24 hours). Use flight altitude, not a planned pressurized cabin altitude, for this comparison.
      • Give dive completion times, dive profiles, and proposed flight altitudes; require the student to select the applicable recommended interval and revise departure when necessary. Clarify the meaning of controlled ascent in the guidance and distinguish these recommendations from a guarantee against illness.
    • Introduce symptoms, recognition, causes, effects, and corrective actions associated with hypoxia.
    • Introduce symptoms, recognition, causes, effects, and corrective actions associated with hyperventilation. (PA.I.H.K1b)
    • Introduce symptoms, recognition, causes, effects, and corrective actions associated with the middle ear and sinus problems. (PA.I.H.K1c)
    • Introduce symptoms, recognition, causes, effects, and corrective actions associated with spatial disorientation. (PA.I.H.K1d)
    • Introduce symptoms, recognition, causes, effects, and corrective actions associated with motion sickness. (PA.I.H.K1e)
    • Introduce symptoms, recognition, causes, effects, and corrective actions associated with carbon monoxide poisoning. (PA.I.H.K1f)
    • Introduce symptoms, recognition, causes, effects, and corrective actions associated with dehydration and nutrition. (PA.I.H.K1i)
    • Introduce symptoms, recognition, causes, effects, and corrective actions associated with hypothermia. (PA.I.H.K1j)
    • Introduce symptoms, recognition, causes, effects, and corrective actions associated with optical illusions. (PA.I.H.K1k)
      • Discuss autokinesis, false horizons, and missing peripheral cues over unlighted terrain or water.
      • Introduce how runway width, slope, light intensity, haze, fog, and rain can distort perceived height, distance, or attitude.
      • Discuss misleading ground lights, independent airport identification, reliable instrument and glidepath cross-checks, and going around when a safe approach cannot be verified.
    • Introduce symptoms, recognition, causes, effects, and corrective actions associated with dissolved nitrogen in the bloodstream after scuba dives. (PA.I.H.K1l)
    • Introduce the effects of alcohol, drugs, and over-the-counter medications. (PA.I.H.K3)
  • Part 3, Fitness for Flight:
    • Stress and fatigue. (PA.I.H.K1g, PA.I.H.K1h)
      • Have the student distinguish acute and chronic stress and fatigue, identify causes and warning signs, and explain their effects on attention, judgment, reaction, and workload tolerance.
      • Present a rested but distracted pilot and a sleep-deprived pilot. Require separate prevention and corrective plans, including rest, workload reduction, assistance, postponement, or cancellation. Discuss why motivation, caffeine, and legal currency do not establish fitness.
    • Review fitness for flight, focusing on the symptoms, recognition, causes, effects, and corrective actions associated with:
    • Introduce various aeromedical checklists.
    • Have the student perform a flight-specific self-assessment using an appropriate fitness-for-flight checklist and personal minimums, then explain whether to proceed, mitigate the identified risks, delay, or cancel. (PA.I.H.S2)
    • Introduce hazardous attitudes and corrective actions/attitudes. (PA.I.H.R2)
      • Emphasize hazardous attitudes as barriers to good aeronautical decision making.
      • Introduce the five hazardous attitudes and their antidotes; have the student recognize and correct each in an example.
  • Part 4, Aeronautical Decision Making
  • Part 5, Aeromedical Regulation
    • Alcohol, drugs, and medication:
      • Using current 14 CFR 91.17, have the student identify each independent crewmember prohibition: the eight-hour interval, being under the influence, impairing drug use, and an alcohol concentration of 0.04 or greater. Require a scenario decision that checks all conditions, not just elapsed time.
      • Compare regulatory minimums with more conservative waiting guidance and continuing hangover or impairment. Have the student explain effects on judgment, coordination, alertness, and altitude tolerance rather than assume compliance establishes fitness.
      • Present prescription and over-the-counter medication examples. Require evaluation of both the underlying condition and the medicine, including side effects and interactions; consult appropriate FAA guidance or an aviation medical examiner when uncertain and refrain from flight until fitness and applicable requirements are established.
      • Have the student apply these considerations to a proposed flight and explain the delay, cancellation, or other safe change needed. Do not have the instructor diagnose a medical condition or independently approve a medication.
    • Introduce Regulations regarding the use of alcohol and drugs. (PA.I.H.K2)
  • Part 6, Human Factors Risk Management:
    • Assess impairment and protect aircraft control. (PA.I.H.R1)
      • Have the student identify and assess aeromedical hazards using occupant condition, altitude, exposure, aircraft systems, and expected workload. Require a justified prevention or mitigation plan and reassessment if symptoms or conditions change.
      • Introduce a symptomatic passenger, competing radio calls, and a navigation task. Have the student prioritize aircraft control, defer nonessential tasks, use available assistance, and explain when to divert, land, or seek emergency help.
      • Ask the student to identify lost situational awareness or disorientation cues and explain controls: reduce workload, use reliable flight references, and request assistance. Keep this foundational exercise on the ground; later maneuver training supplies the required instrument-control skills.
    • Require the student to identify the earliest practical mitigation for each aeromedical hazard and to establish a clear trigger for delaying, diverting, landing, or seeking assistance before impairment compromises aircraft control.
  • Part 7, Human Factors Guided Scenario(s):
    • Apply and correct symptom-to-action decisions. (PA.I.H.S1)
      • Use the three guided scenarios already below: the anxious passenger during climb, the unusually talkative passenger at altitude, and recurring postflight headaches. Supply the altitude, timing, aircraft-system status, and occupant history needed to support decisions; symptoms may have more than one cause.
      • For at least three conditions from PA.I.H.K1a through K1l, require the student to associate symptoms and performance effects with plausible causes, then explain appropriate corrective and preventive actions. Record which conditions were assessed and any gaps.
      • Change one scenario fact or challenge an unsafe initial response. Require the student to recognize the error, correct the action sequence, and explain the revised decision. Provide feedback and reassess against PA.I.H.S1; lesson-plan verification does not award student skill completion.
      • Do not deliberately expose a student or passenger to hypoxia, hyperventilation, toxins, or other impairment to demonstrate the condition.
      • After an initial anxiety explanation, reveal that multiple occupants developed headaches while cabin heat was operating. Require reassessment of a shared exposure and correction of the response rather than defending the initial assumption.
    • Conclude each scenario by having the student reassess fitness for flight and personal minimums as conditions change, documenting whether the correct outcome is continuation, mitigation, diversion, landing, delay, or cancellation. (PA.I.H.S2)
  • Part 8, Conclude Lesson:
    • Discuss aeromedical training locations/opportunities.
    • Tie lesson back to previous lessons to reinforce past experiences (law of readiness).
    • Present the remotivation, conclude, and provide guidance for follow-on lessons.
    • Review student actions required ahead of the next lesson.
  • Update instructor endorsement records and the student's jacket, as required.
Guided Scenario(s)

Guided Scenario(s)

  • During the climb, the nervous passenger begins to start breathing heavily, panicking that they're an uneasy flier and have never been so far from the ground as they begin to experience dizziness.
    • What may the passenger be experiencing?
    • What are some corrective actions?
    • How could this event be prevented/mitigated on subsequent legs of the flight?
    • What are some of the risk factors for this type of event?
  • The aircraft is now operating at a high altitude when a passenger starts becoming uncharacteristically talkative, laughing, and explaining how they're feeling a little light headed but otherwise enjoying the flight.
    • What may the passenger be experiencing?
    • What are some corrective actions?
    • How could this event be prevented/mitigated on subsequent legs of the flight?
    • What are some of the risk factors for this type of event?
  • After landing, the pilot recognizes not only that they have a headache, but that they've had one after the past few flights.
    • What may the pilot be experiencing?
    • What are some corrective actions?
    • How could this event be prevented/mitigated on subsequent legs of the flight?
    • What are some of the risk factors for this type of event?
  • Related scenarios:
    • None.
Student Actions

Student Actions

Airman Certification Standards

Airman Certification Standards

ACS Objective and References

Knowledge 4 ACS Elements
Risk Management 4 ACS Elements
Skills 2 ACS Elements
Conclusion

Conclusion

  • Re-Motivation:

    • Human Factors demonstrates that safe performance depends on recognizing personal, physiological, and environmental limitations before they compromise judgment or aircraft control.
    • Honest self-assessment and early recognition of symptoms, stressors, medication effects, fatigue, and changing conditions give pilots time to reduce risk before it becomes an emergency.
    • Applying fitness-for-flight habits and sound aeronautical decision-making makes human-factor awareness a practical part of every preflight and in-flight decision.
    • Further study of Human Factors helps private pilots build the resilience, awareness, and judgment needed for increasingly demanding operations.

  • Closure:

    • Advise students that this lesson will be used as a starting point for the next lesson.
    • Assign study materials for the next lesson.