Missing Air-Crash Reports Leave Safety Lessons Unshared, Aviation Leaders Warn

Aviation safety leaders have renewed pressure on governments to publish accident findings, warning that missing reports prevent airlines and regulators from learning lessons. International rules and new safeguards put transparency at the centre of prevention.

An Airbus A350 parked on an airport apron, viewed from the front. — An Airbus A350 on an airport apron. Illustrative photograph for aviation safety reporting. Photograph: Haci / Unsplash.

Governments are leaving important aviation safety lessons unpublished, industry leaders warned on 12 November, as the International Air Transport Association said final reports appear for only about half of accidents investigated under international rules. The warning came at the International Aviation Safety Summit in Montreal, Reuters reported.

A separate IATA assessment published in March found that 63% of accident reports for investigations conducted between 2019 and 2023 were completed in line with state obligations. IATA used that older five-year period because inquiries often take more than a year. That defined dataset should not be treated as directly interchangeable with the summit’s broader estimate.

The industry has documented why disclosure matters. A joint position paper by aviation organizations, including IATA and the Flight Safety Foundation, explains that final reports give operators, manufacturers and regulators evidence for corrective action. It calls for complete, accessible findings and cautions that interim updates cannot substitute for a finished investigation.

What the investigation timetable requires

The Annex 13 framework distinguishes sending a preliminary report, normally within 30 days, from publishing it. ICAO’s investigation manual recommends publication within that period for accidents or incidents drawing heightened public attention. That recommendation should not be confused with a universal requirement to make every preliminary report public.

Final reports are different: they must be made publicly available as soon as possible and, if possible, within 12 months. The joint industry paper explains that, when an inquiry takes longer, a public statement on each anniversary must describe its progress and safety issues. This preserves disclosure while complex analysis continues.

The UK Air Accidents Investigation Branch’s November bulletin, published on 12 November, illustrates the work involved. Its description of field investigations includes witness interviews, document reviews, wreckage examination and analysis of recorded data. The bulletin also distinguishes those inquiries from correspondence investigations, which rely largely on information supplied by aircraft commanders and may carry evidential limitations.

New safeguards for sensitive inquiries

The International Civil Aviation Organization has already moved to address another obstacle: conflicts of interest. In changes approved in March, it sought to strengthen the independence of investigations, including cases involving suspected unlawful interference. ICAO said some inquiries had been halted or transferred, leading to delayed findings or no final safety report.

The measures describe options such as delegating an investigation to another country or regional body, inviting outside observers and releasing verified factual updates. They also emphasize communication with victims’ families and unrestricted access to evidence for accident investigators. These safeguards are intended to preserve confidence when a case involves politically sensitive questions.

The revised provisions will become applicable on 23 November 2028. Thursday’s criticism therefore concerns a publication problem that governments must address under the existing framework while preparing for stronger safeguards. The date gives states time to adapt their laws and procedures; it does not resolve the current backlog.

Rare accidents still require shared lessons

The broader safety picture remains more nuanced than any single disaster suggests. IATA’s 2025 safety report recorded 51 accidents across 38.7 million flights, an overall rate of 1.32 per million flights compared with 1.42 in 2024. Yet eight accidents were fatal, and onboard deaths increased to 394.

Those figures show why both frequency and severity matter. A lower overall accident rate can coexist with a worse fatality total when a small number of events have devastating outcomes. For regulators and airlines, publishing detailed findings remains a way to turn those rare events into specific improvements in training, equipment and operating procedures.