IATA Warns Half of Accident Investigations End Without a Final Report

Only half of aviation accident investigations worldwide result in a published final report, according to a public warning from an IATA executive. The figure, if accurate, means one in every two accidents produces no formal, shared account of what went wrong.

The statistic cuts against the entire architecture of global aviation safety. IATA states that the purpose of accident investigation under Annex 13 of the Chicago Convention is prevention, not the assignment of blame or liability. A final report that is never written cannot teach anyone anything. The lesson, in effect, dies with the file.

What does Annex 13 actually require?

ICAO Annex 13 is the international framework governing how states handle aviation accident investigations. It is not a new instrument, and its obligations are well established.

• Investigating states must publish a preliminary report within approximately 30 days of an accident.
• The final report must be made public as soon as possible, with 12 months set as the target.
• Where a final report cannot be completed within that period, the investigating state must publish an interim statement on each anniversary of the accident until the report is released.

Aerospace Global News, AVweb and Airways Magazine all report the same framework, which reinforces a simple point: these are long-standing obligations, not recent additions. The gap, therefore, sits between the rules and the practice, not within the rules themselves.

The interim statement mechanism deserves particular attention. It exists precisely to keep an investigation from disappearing quietly once the 12-month target has slipped. An anniversary statement forces the investigating state back into public view, if only to say that work continues. IATA's warning suggests that in a substantial number of cases, even that minimal act of disclosure is not happening.

Why does incomplete reporting matter?

Aviation safety is built on shared learning. A published final report normally carries safety recommendations directed at states, airlines, manufacturers and regulators. Those actors cannot act on findings they never receive.

When a report goes unpublished, its recommendations are delayed at best and lost entirely at worst. Other investigators cannot cross-reference the case. Other operators cannot check whether the same failure mode exists in their own fleets. The preventive loop, which Annex 13 was written to close, stays open.

That has a cost. Every accident that goes unexamined is an accident whose causes remain available to recur. The industry's remarkable safety record rests on the assumption that each failure is converted into distributed knowledge. A 50 percent reporting failure rate breaks that conversion at the halfway mark.

Is anyone accountable?

The warning came from IATA, the industry's own trade body, which gives it a particular weight. Airlines are the direct beneficiaries of investigation findings, and IATA's decision to state the shortfall publicly amounts to a rebuke of the states responsible for conducting the investigations.

Annex 13 places the obligation on the investigating state, and there is no meaningful enforcement mechanism beyond the reputational pressure of an unmet anniversary. That appears to be insufficient. Half of investigations reaching no published conclusion is not a marginal compliance gap; it is a structural failure of the disclosure system.

The backdrop for the debate includes high-profile investigations, such as the ongoing NTSB work following the mid-air collision near Washington Reagan National on 7 February 2025, which involved a Mitsubishi Heavy Industries RJ Aviation CRJ700 and a Sikorsky UH-60 helicopter. Cases of that visibility rarely vanish from view. The concern is the long tail of investigations that lack a spotlight.

IATA's figure also invites a harder question: how many of the missing reports belong to states with limited investigation resources? Annex 13 assumes capacity that not every investigating authority possesses. The 12-month target is demanding for a small authority handling a complex accident.

The annual interim statement requirement remains the system's built-in pressure valve, and it is not working as intended in a substantial number of cases. IATA, ICAO or a national investigating authority may yet issue formal guidance in response to the warning; until then, half the world's accident record remains formally unwritten.

By Grace Kim