Commercial Aviation Safety and Risk Management

A complete set of vocabulary flashcards covering the eras of aviation safety, risk management, regulatory bodies, Annexes, and accident investigation models.

Technical Era

An era of commercial aviation safety focused primarily on equipment and aircraft parts.

Human Factors Era

An era of commercial aviation safety centered on human performance, driven by the public demand to reduce accident rates as crashes continued to occur.

Organizational Era

An era of commercial aviation safety emphasizing management practices, airline safety culture, and regulatory frameworks, founded on the belief to follow all procedures and draw on the experience of others rather than inventing everything anew.

Total Systems Era

An era of commercial aviation safety focused on adopting and adapting performance-enhancing techniques and procedures across all components of aviation.

Crew Resource Management (CRM)

A safety process originally used in the aircraft cockpit that has expanded to air traffic control (ATC) and engineering to optimize team performance and communication.

ICAO

International Civil Aviation Organization; the international body that monitors and regulates today's commercial aviation system.

Skill Fade

The decrease in proficiency or capabilities after not practicing them for a period of time, such as pilots not flying during COVID-19.

CB

Large cumulonimbus buildups that can signal severe weather.

Ice Crystal Icing

Microscopic ice crystals that can adhere to the blades of turbine engines or obstruct airspeed sensors.

ITCZ

Intertropical Convergence Zone; an area capable of producing intense thunderstorms that present a significant threat to aviation safety.

Non-Normal Situations

Events or circumstances occurring during flight operations that are outside of routine operations.

Startle Effect

An uncontrollable psychological and physiological reaction to an unexpected event.

Weather Radar

An onboard instrument that detects water droplets in the atmosphere to identify precipitation and storms.

AAR 214

An Asiana Airlines Boeing 777 that crashed into the undershoot of runway 28L at San Francisco International Airport (SFO) on July 6, 2013, due to a mishandled visual approach and crew confusion with automated flight modes, resulting in 3 fatalities and 187 injuries.

Rediske Air Crash

A fatal accident on July 7, 2013, at Soldotna Airport involving an overweight DHC-3 Otter that stalled due to inappropriate loading, weight imbalances, and excessive trim forces after takeoff, resulting in 10 fatalities.

Difference Through Distancing

A psychological rationalization where an operator dismisses safety lessons from an accident under the belief that the scenario is not relevant to them (e.g., 'I will never fly that aircraft type').

Safety (ICAO Definition)

The state in which harm to persons or of property damage is reduced to, and maintained at or below, an acceptable level through a continuing process of hazard identification and risk management.

Risk

The possibilities of loss or injury; a measure of how likely a hazard is to cause an incident and how severe the consequences could be.

Hazard

Anything that has the potential of causing loss or injury, or that could potentially contribute to an accident or damage.

Tolerable Risk

The willingness to live with a risk in order to secure certain benefits, with confidence that the risk is being properly controlled and mitigated.

Acceptable Risk

A level of risk that an individual or organization is prepared to accept as it is for the purposes of life or work without further mitigation.

Flight Risk Assessment Tool (FRAT)

A formal tool and matrix used by operators to evaluate and assess risk levels prior to flight.

Target Zero

The concept of attempting to extinguish all risks, which is counterproductive in aviation because it promotes fear, penalization, and suppression of open reporting rather than managing risks in real time.

Heat Map

A graphical representation used to visualize risk, combining qualitative and semi-quantitative data across probability and severity scales.

Annex 1

The ICAO Annex establishing international standards for Personnel Licensing.

Annex 6

The ICAO Annex setting standards and recommended practices for the Operation of Aircraft.

Annex 8

The ICAO Annex specifying requirements for the Airworthiness of Aircraft.

Annex 13

The ICAO Annex outlining procedures for Aircraft Accident and Incident Investigation.

Annex 18

The ICAO Annex regulating the Safe Transport of Dangerous Goods by Air.

Annex 19

The ICAO Annex governing Safety Management and Safety Management Systems (SMS).

Safety Management Manual (SMM)

An ICAO publication (Doc 9859) that provides an operational framework and principles for managing aviation safety across reactive, proactive, and predictive approaches.

FAA

Federal Aviation Administration; the U.S. government agency that regulates civil aviation within the United States and U.S. waters through rulemaking, certification, and oversight.

NTSB

National Transportation Safety Board; an independent U.S. agency that investigates major civil transportation accidents, determines probable causes, and issues safety recommendations.

Reactive Approach

A safety management method that responds to and analyzes past accidents, incidents, and safety events after they have already occurred.

Proactive Approach

A safety management method that identifies hazards and manages safety risks before an accident occurs through voluntary reporting systems and intuitive platforms.

ALOS

Acceptable Level of Safety; an expression of the safety objectives set by a regulatory authority while acknowledging an organization's need to fulfill its business function.

ALARP

As Low As Reasonably Practicable; a safety principle stating that risk must be reduced until the cost of further reduction is grossly disproportionate to the benefit achieved.

Microburst

A localized, violent shaft of descending air falling from a storm cloud that produces damaging divergence winds at the surface.

Wind Shear

An unexpected and rapid change in wind speed or wind direction over a short distance.

Downburst

An area in the core of a thunderstorm where descending air strikes the ground and spreads outward and upward.

Doppler Radar

A radar system that emits radio waves to detect microbursts and measure the velocity and movement of winds within storms, implemented broadly after Delta Flight 191.

Pilot Reporting System

A confidential reporting system allowing pilots to voluntarily submit safety concerns, errors, and hazards (such as to NASA) without fear of punitive action.

Air France 447 Crash (2009)

The fatal accident of an Airbus A330 over the Atlantic Ocean killing 228 people, caused by pitot tube icing, unreliable airspeed indications, CRM failures, and improper pilot stall recovery inputs.

ALoSP

Acceptable Level of Safety Performance; the agreed target level of safety performance defined by a regulator or established within an aviation organization.

Safety Performance Indicator (SPI)

A data-based parameter and measurable metric used to monitor and evaluate safety performance within an organization.

Safety Performance Target (SPT)

A planned, quantified safety performance goal that an organization aims to achieve over a specified operating timeframe.

Commercial Pressure

The operational and financial demands placed upon an airline that can inadvertently influence or compromise safety decision-making.

Thematic Framing

Presenting safety data by focusing on broader systemic patterns, aggregate statistics, pilot training shortfalls, and industry-wide trends.

Episodic Framing

Presenting safety information by focusing almost exclusively on a single isolated incident, specific event, or individual actor.

Latent Conditions

Hidden systemic vulnerabilities, managerial shortcomings, or procedural flaws that remain dormant until triggered by active unsafe actions.

Active Failures

Unsafe actions, omissions, or errors committed by frontline personnel who are in direct physical control of the system.

Swiss Cheese Model

James Reason's accident causation model illustrating how accidents occur when holes in successive organizational defense barriers momentarily align.

HFACS

Human Factors Analysis and Classification System; a framework used to identify, analyze, and categorize human-related causal factors across all organizational levels of an accident.

Normal Accident Theory

The theory stating that in complex, tightly coupled technological systems, accidents are inevitable due to unanticipated and multiple interacting system failures.

Practical Drift

The slow, unperceived drift between established standard operating procedures and how frontline employees actually execute their daily tasks.

Linear Accident Model

A causation model that conceptualizes an accident as a sequential chain of discrete events or causes leading to a single outcome.

Complex Accident Model

A model explaining accidents as emergent outcomes produced by non-linear, unpredictable interactions among multiple system components.

Functional Resonance Analysis Method (FRAM)

A systemic method that examines how normal operational variability in everyday activities can resonate and combine to cause unexpected accidents.

Black Swan Event

An outlier event that is extremely rare, unexpected, and carries severe, high-impact consequences.

High Reliability Theory (HRT)

A theory describing how hazardous, complex organizations operate virtually accident-free over long periods through strong safety culture, mindfulness, and redundancy.

Not-for-Blame Accident Investigation

An investigation methodology structured to uncover root causal factors and systemic defenses to prevent recurrence rather than assigning blame or legal liability.

Go-Team

A dedicated group of specialized accident investigators dispatched immediately to the site of a major transportation accident.

Investigator-in-Charge (IIC)

The designated individual responsible for managing, directing, and leading all operations during an official accident investigation.

Party System

The investigative practice that permits external technical specialists from affected aircraft operators, manufacturers, and regulators to participate in an accident probe.

Flight Data Recorder (FDR)

An onboard recording instrument that captures engineering parameters, aircraft trajectories, and performance metrics during flight.

Cockpit Voice Recorder (CVR)

An onboard recording device engineered to record cockpit flight deck communications, radio transmissions, and ambient acoustic sounds.

Perishable Evidence

Physical or environmental data that will degrade, melt, blow away, or dissipate quickly if not cataloged immediately following an accident.

Probable Cause

The primary finding determined by an investigative body explaining the decisive event or condition that caused an accident.

Contributing Factors

Secondary conditions, events, or environment factors that, while not the direct cause, actively facilitated or exacerbated the occurrence of an accident.