What types of occurrences must be reported mandatorily in aviation?

Events that pose a significant risk to aviation safety, such as accidents, serious incidents, and specific operational, technical, or air navigation occurrences, must be mandatorily reported.

What is the difference between an accident, a serious incident, and an incident?

An accident involves serious injury or substantial aircraft damage; a serious incident could have led to an accident; an incident is any other event affecting or potentially affecting safety.

How are voluntary reports used in aviation safety?

Voluntary reports capture safety-related information not covered by mandatory systems, helping to identify hazards and improve safety proactively.

How is occurrence data collected and analysed?

Data from both mandatory and voluntary reports is stored in national safety databases and systematically analysed to identify trends and prevent future occurrences.

What is the purpose of ICAO and EU regulations on accident and incident reporting?

Their primary aim is to enhance safety by ensuring thorough investigation, open reporting, and analysis of occurrences, not to assign blame or liability.

Accident and Incident Reporting Requirements

Medium4 min readAir Law

Moderately Examined

Why this matters

Accurate reporting of accidents and incidents enables the aviation industry to learn from mistakes, address hazards proactively, and prevent future occurrences, directly impacting flight safety and operational reliability.

Accident and incident reporting requirements in aviation are governed by strict international and European regulations. Pilots, operators, and aviation personnel must accurately identify, classify, and report occurrences such as accidents, serious incidents, and incidents to ensure hazards are addressed and safety lessons are shared. Both mandatory and voluntary reporting systems exist to capture a comprehensive picture of aviation safety events.

Quick Check

A passenger is seriously injured while disembarking an aircraft after it has come to a complete stop. How should this occurrence be classified and what is the required reporting action?

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Explanation

Definitions and Classifications

Accident: An occurrence associated with the operation of an aircraft where a person is fatally or seriously injured, the aircraft sustains significant damage or structural failure, or the aircraft is missing or inaccessible.
Serious Incident: An occurrence involving circumstances indicating a high probability of an accident, but where no accident has occurred. Examples include crew incapacitation or near-collisions.
Incident: An event, other than an accident or serious incident, which affects or could affect the safety of operations.

Mandatory and Voluntary Reporting

Mandatory Reporting: Required for accidents, serious incidents, and specific incidents as outlined in EU and ICAO rules. Reports must be submitted by crew, maintenance personnel, air traffic controllers, and aerodrome operators.
Voluntary Reporting: Captures safety-related occurrences not covered by mandatory requirements or not reported by those directly involved. This helps identify emerging risks and safety trends.

Key Regulations

Regulation (EU) No 996/2010: Focuses on the investigation and prevention of accidents and incidents.
Regulation (EU) No 376/2014: Establishes rules for occurrence reporting, analysis, and follow-up, ensuring information is used for safety improvement, not blame.

Collection, Storage, and Analysis

All occurrence data is collected confidentially and stored in national and European safety databases.
This data is systematically analysed to identify patterns, root causes, and systemic risks.
Findings are shared across the aviation community to drive safety improvements.

Occurrences to Report

Collisions or near-misses
Serious injuries during boarding, flight, or disembarkation
Structural damage to aircraft
Crew incapacitation
Failures of critical systems or ground infrastructure
Air traffic management or navigation service hazards

Voluntary Reporting Examples

Observed safety hazards not resulting in an incident
Near-misses not covered by mandatory categories
Potential safety concerns noticed by any aviation staff

ICAO and International Sharing

ICAO Annex 13 and 19 set global standards for reporting and investigation.
States are encouraged to share safety information internationally to prevent recurrence of hazards elsewhere.

The essentials

Key Points

Accidents involve serious injury, death, or significant aircraft damage and must always be reported.

Serious incidents are high-risk events that could have led to an accident and require mandatory reporting.

Incidents are less severe but still affect or could affect safety and may be either mandatory or voluntarily reported.

EU Regulations 996/2010 and 376/2014 set the legal framework for reporting and investigation.

Mandatory and voluntary reporting systems together provide a complete safety picture.

All reports are confidential and used for safety improvement, not blame.

Systematic analysis of reported data identifies trends and prevents recurrence.

Watch out

Exam Traps & Typical Mistakes

Confusing a serious incident with an accident—remember, actual injury or major damage makes it an accident.

Assuming only pilots must report—maintenance, ATC, and ground staff also have reporting duties.

Believing voluntary reports are unnecessary—these are vital for capturing emerging risks.

Thinking reporting leads to punishment—the system is designed for safety, not blame.

Missing the difference between mandatory and voluntary reporting categories.

Test yourself

Example Exam Questions

Question 2Easy

Which of the following occurrences must be reported under mandatory occurrence reporting requirements?

Question 3Medium

What is the main difference between Regulation (EU) No 996/2010 and Regulation (EU) No 376/2014 in the context of accident and incident reporting?

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