Human Performance and Limitations Study Notes

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  • Publisher: CAE Inc.
  • Year: 2020
  • Subject: Human Performance and Limitations
  • Part of the CAE ATPL Ground Training Series

Copyright Notice

  • This book is provided for personal use and for private study only.
  • It cannot be reproduced in any form or medium, copied, stored in a retrieval system, or adapted in whole or in part without prior written consent from CAE Inc.
  • Material reproduced by permission of third parties is acknowledged as such.
  • Copyright belongs exclusively to CAE Inc. on all documents and materials bound within this book.
  • The book assists students enrolled in EASA ATPL courses in preparing for theoretical knowledge examinations.

Introduction

  • The content does not constitute practical flying instruction or advice.
  • The book is not a substitute for the EASA ATPL (A) theoretical knowledge training syllabus.
  • The syllabus is the sole authoritative definition of what should be studied in an EASA ATPL (A) training program.
  • No student may enter the EASA ATPL (A) theoretical knowledge examinations without first being enrolled in an approved training school.
  • CAE Inc. disclaims all liability for reliance on this book.

How to Use This Book

  • Division: The book aligns with EASA Learning Objectives and is divided into subject sections.
  • Volume Markings: Each chapter starts with numerical codes such as 02.00 for chapter numbers.
  • Learning Objectives Icon: Identified by a target icon throughout the book.
  • Complementary Information: Highlighted with a magnifying glass icon in the margin.
  • Important Equations: Identified by a calculator icon.
  • Examples: Denoted by a gear icon.
  • Glossary: Key terms highlighted in red can be found in the Glossary Index.

Other Publications

  • CAE ATPL Ground Training Series includes books on various aviation topics from Air Law to Human Performance and Limitations.
    • Book 1: Air Law
    • Book 2: Aircraft General Knowledge: Airframes and Systems
    • Book 3: Aircraft General Knowledge: Electrics and Electronics
    • Book 4: Aircraft General Knowledge: Powerplant
    • Book 5: Aircraft General Knowledge: Instrumentation
    • Book 6: Mass and Balance
    • Book 7: Performance
    • Book 8: Flight Planning and Monitoring
    • Book 9: Human Performance and Limitations
    • Book 10: Meteorology
    • Book 11: General Navigation
    • Book 12: Radio Navigation
    • Book 13: Operational Procedures
    • Book 14: Principles of Flight
    • Book 15: Communications
    • Book 16: Knowledge, Skills and Attitudes (KSA)

Table of Contents

Human Performance and Limitations

  • 040.01 Human Factors: Basic Concepts

    • 01.00 Human Factors in Aviation
    • 01.01 Becoming a Competent Pilot
    • 02.00 Intentionally Left Blank
    • 03.00 Flight Safety Concepts
    • 03.01 Threat and Error Management (TEM) Model and SHELL Model
    • 04.00 Safety Culture
    • 04.01 Safety Culture and Safety Management

  • 040.02 Basics of Aviation Physiology and Health Maintenance

    • 01.00 Basics of Flight Physiology
    • 01.01 The Atmosphere
    • 01.02 Respiratory and Circulatory System
    • 01.03 High Altitude Environment
    • 02.00 People and the Environment: The Sensory System
    • 03.00 Health and Hygiene

  • 040.03 Basic Aviation Psychology

    • 01.00 Human Information Processing
    • 01.01 Attention and Vigilance
    • 01.02 Perception
    • 01.03 Memory
    • 01.04 Response Selection

Human Error and Reliability

  • 02.00 Human Error and Reliability
  • 02.01 Reliability of Human Behaviour
  • 02.02 Mental Models and Situation Awareness

Human Factors: Basic Concepts

Human Factors in Aviation

  • Competence Definition:

    • Competence = Knowledge + Skills + Attitudes of pilots.

  • ICAO Core Competencies:

    1. Application of Procedures
    2. Communication
    3. Automated Flight Path Management
    4. Manual Flight Path Management
    5. Leadership and Teamwork
    6. Problem Solving and Decision Making
    7. Situational Awareness
    8. Workload Management

  • Historical Context:

    • First manned flight by Orville Wright in 1903, leading to both advancements and accidents.
    • Shift in accident causes from mechanical failures to human error; about 75% of accidents related to 'human error,' defined as a less-than-optimal human performance.

  • Human Factors Focus:

    • Understand the limitations and capabilities of humans in aviation.
    • Topics include physiological challenges of flying (e.g., altitude effects, lack of oxygen, and pressures) and psychological aspects (decision-making and information processing).

Basics of Flight Physiology

  • Atmospheric Composition:
    • Constant volume percentage of gases in air (78% nitrogen, 21% oxygen, 1% others) regardless of altitude.
    • Pressure decreases with altitude impacts breathing.

Sources of Human Error and Threats

  • TEM Model Components:
    1. Threats: External events affecting operations.
    • Types of Threats:
      • Overt threats (visible obstacles)
      • Latent threats (hidden risks, e.g., equipment design flaws)
      • Anticipated threats (known risks)
      • Unexpected threats (sudden failures)
    1. Errors: Actions deviate from intentions due to poor judgment or communication.
    2. Undesired Aircraft States (UASs): Result from unmanaged errors; can lead to incidents.
  • Countermeasures: Operational processes to address threats, manage errors, and maintain safety.

Advanced Aviation Concepts

Threat and Error Management (TEM) Model

  • Key Concepts:
    • Proactive management of threats and errors during flight operations through clear communication and teamwork.
    • Countermeasures: Include Crew Resource Management (CRM), checklists, and adherence to SOPs.

Safety Culture

  • Open vs. Closed Cultures:
    • Open cultures actively communicate safety improvements while closed cultures restrict information sharing, increasing risks.
  • James Reason’s Swiss Cheese Model:
    • Visualizes organizational defenses against failure as slices of cheese, with holes (failures) aligning leading to incidents.
  • Components of Safety Culture:
    1. Reporting culture
    2. Learning culture
    3. Just culture
    4. Flexible culture

Stress and Human Factors in Aviation

Arousal, Stress and Performance

  • Arousal states:
    • Low arousal (boredom, hypovigilance) negatively affects performance.
    • High arousal (stress) leads to potential performance degradation after the breakpoint.
  • Coping strategies: Effective sleep, regular breaks, and planning can mitigate effects of stress and mental load.

Decision-Making in Aviation

Factors Influencing Decision Making

  • Effective decision-making integrates situational awareness, experience, and reliable processes.
  • Risk assessment considers time, stress, and specific operational cues.

Human Behavior in Aviation

The Role of Personality, Attitude, and Team Dynamics

  • Teamwork: Cooperation and clear communication among crew members are essential.
  • Team Cohesion: A shared commitment to safety fosters a better working environment.
  • Role Conflict: Mixing roles and status can affect teamwork negatively.

Summary of Key Models and Theories

Error Models

  • Error Chain Concepts:
    • Use of the Generic Error Modelling System (GEMS) for understanding breakdowns in performance.
    • Internal and external factors contributing to errors and how they can be minimized through design and training.

Conclusion

  • Safety in Aviation: Knowledge and understanding of human performance limitations are fundamental in enhancing aviation safety and ensuring the effectiveness of pilot training.

Glossary Index

  • Comprehensive glossary covering key terminologies used within the text to enhance clarity and understanding of aviation psychology and human performance.