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.

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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)
      • For each condition, connect recognition cues and likely causes to performance effects, prevention, and corrective action.
      • When symptoms overlap, protect aircraft control, address the most serious credible cause, then reassess without waiting for certainty.
        • Evidence favoring hypoxia includes altitude or oxygen-system exposure, unexplained euphoria, degraded judgment, missed tasks, cyanosis, or similar impairment in more than one occupant.
        • Evidence favoring hyperventilation includes an anxiety, pain, fear, or workload trigger; observed rapid or deep breathing; tingling around the mouth or extremities; and hand or foot cramping.
        • Dizziness, headache, visual disturbance, tingling, poor coordination, cognitive impairment, and unconsciousness can occur with either condition and do not establish the diagnosis by themselves.
        • If hypoxia remains plausible, use oxygen and the applicable aircraft procedure, descend or land as conditions require, and simultaneously coach normal breathing rather than delaying protective action to diagnose the condition.
        • Use the onset, altitude, exposure history, equipment indications, other occupants, and response to corrective action to reassess without using improvement as proof of a single cause.
    • Hypoxia. (PA.I.H.K1a)
      • Compare hypoxic, hypemic, stagnant, and histotoxic hypoxia, including altitude-related oxygen availability and an example of each.
      • Recognize symptoms and contributing factors; explain performance effects and time of useful consciousness/effective performance time without treating published times as guarantees.
      • Prevent and respond with proper oxygen equipment, aircraft procedures, and descent; compare regulations with conservative day/night guidance and personal susceptibility.
    • Hyperventilation. (PA.I.H.K1b)
      • Use an aircraft- or scenario-specific example, then have the learner explain excessive ventilation, carbon-dioxide loss, common triggers, symptoms, performance effects, and overlap with hypoxia.
      • Maintain control, reduce workload, calm the occupant, coach normal breathing, and use oxygen, descent, or landing when indicated; prevent recurrence through passenger briefing and early intervention. Never induce impairment in flight.
    • Middle-ear and sinus pressure. (PA.I.H.K1c)
      • Relate climb/descent pressure changes and blockage to pain, impaired hearing, vertigo, distraction, and possible barotrauma.
      • Use gentle equalization and safe altitude changes; postpone for congestion, land for persistent symptoms, and seek medical guidance rather than forcing the flight with medication.
    • Spatial disorientation. (PA.I.H.K1d)
      • Use an aircraft- or scenario-specific example, then have the learner explain how conflicting visual, vestibular, and proprioceptive cues create false motion or attitude sensations, especially with reduced visibility, acceleration, turns, or head movement.
      • Recognize early cues, trust reliable instruments, limit head movement, reduce workload, obtain assistance, and prevent exposure through planning and proficiency.
    • Motion sickness. (PA.I.H.K1e)
      • Use an aircraft- or scenario-specific example, then have the learner explain sensory conflict, triggers, early-to-late symptoms, performance effects, passenger preparation, meal choices, and medication limitations.
      • Maintain smooth control, provide cool air and an outside reference, protect controls, delegate care, and land before distraction or incapacitation becomes unsafe.
    • Carbon monoxide poisoning. (PA.I.H.K1f)
      • Connect exhaust/heater sources and impaired oxygen transport to detector indications, shared symptoms, degraded judgment, and incapacitation risk.
      • Act before symptoms worsen: heat off, fresh air, oxygen and checklist as applicable, then land; obtain medical and maintenance follow-up even if occupants improve.
    • Dehydration and nutrition, and hypothermia. (PA.I.H.K1i) (PA.I.H.K1j)
      • Recognize dehydration and inadequate nutrition through their causes, symptoms, and effects on concentration, endurance, and judgment; plan food, fluids, and breaks.
      • Recognize cold stress and hypothermia—including shivering, poor dexterity, apathy, and confusion—and plan clothing, shelter, cabin heat, and survival equipment.
      • Delay, divert, land, warm, or obtain medical assistance before impairment; do not use a heater suspected of carbon-monoxide contamination.
    • Flying after scuba diving. (PA.I.H.K1l)
      • Use an aircraft- or scenario-specific example, then have the learner explain how residual dissolved nitrogen and reduced pressure create decompression-sickness risk; recognize joint, skin, respiratory, fatigue, and neurologic symptoms.
      • Apply current FAA/AIM surface intervals: at least 12 hours after non-decompression dives up to 8,000 feet, and at least 24 hours after decompression dives or before flight above 8,000 feet.
      • Use the actual flight/cabin altitude and dive profile; delay when uncertain, and use oxygen, landing, emergency assistance, and urgent medical evaluation if symptoms occur.
    • Optical illusions. (PA.I.H.K1k)
      • Recognize autokinesis, false horizons, black-hole conditions, misleading lights, and runway width/slope or weather illusions; predict the control error each may invite.
      • Verify with instruments, airport identification, glidepath and altitude cues, stabilization criteria, and a go-around whenever the flightpath cannot be confirmed.
  • Part 3, Fitness for Flight:
    • Stress and fatigue. (PA.I.H.K1g, PA.I.H.K1h)
      • Distinguish acute/chronic stress and fatigue, their causes and warning signs, and their effects on attention, judgment, reaction, and workload tolerance.
      • Apply IMSAFE and personal minimums; use rest, workload reduction, assistance, delay, or cancellation rather than relying on caffeine, motivation, experience, or legal currency.
    • Review fitness for flight, including recognition, performance effects, prevention, and corrective decisions for:
    • Use aeromedical checklists and a flight-specific self-assessment to decide whether to proceed, mitigate, 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.
      • Recognize the five hazardous attitudes in context, apply the matching antidote, and convert it into a safer action.
  • Part 4, Aeronautical Decision Making
    • Use PAVE to identify Pilot, Aircraft, enVironment, and External-pressure hazards; apply 3P to perceive, process, and perform controls; then use DECIDE to respond to significant change and evaluate the result.
    • Use CRM and SRM to inventory people, information, equipment, automation, and time; communicate, delegate, verify, and retain pilot-in-command responsibility. (PA.I.H.K4)
    • Recognize confirmation and expectation bias; seek disconfirming evidence, verify independently, and obey objective decision triggers. (PA.I.H.R4)
  • Part 5, Aeromedical Regulation
    • Alcohol, drugs, and medication. (PA.I.H.K3)
      • Apply every independent 14 CFR 91.17 prohibition—not only “eight hours bottle to throttle”—and separate legal compliance from actual fitness.
      • Consider hangover, impairment, altitude, and effects on judgment, coordination, and alertness; legal minimums do not establish fitness.
      • Evaluate the underlying condition, prescription/OTC medicine, dosage, side effects, and interactions; consult FAA guidance or an AME and do not fly while legality or impairment is uncertain.
    • Elicit prior knowledge, then establish the operational relevance of Regulations regarding the use of alcohol and drugs. (PA.I.H.K2)
  • Part 6, Human Factors Risk Management:
    • Integrate the human-factor hazards from the preceding parts into one operational risk picture. (PA.I.H.R1)
      • Reassess aeromedical conditions, fitness for flight, alcohol or medication effects, pilot and passenger impairment, aircraft systems, environment, workload, and external pressure—including how small hazards compound.
      • Apply PAVE, 3P, DECIDE, and available CRM or SRM resources to the combined hazards rather than treating each topic in isolation.
      • Prioritize aircraft control, reduce or delegate workload, use reliable references and assistance, and choose effective controls rather than cosmetic mitigation.
      • Set observable delay, diversion, landing, emergency, and medical-assistance triggers; reassess as conditions change.
    • Manage distractions, task prioritization, situational awareness, and disorientation: aviate, navigate, communicate, defer nonessential tasks, and resume an interrupted workflow from a known point. (PA.I.H.R3)
    • Act at the earliest practical point, before impairment turns remaining options into emergency choices.
  • 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 PA.I.H.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:
    • Use guided questioning to have the learner explain and apply 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 the instructor log and student progress. Select the student and sign off completed objectives. If the student does not have a connected account, record the update manually in the instructor log and student training record.
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.