Tonga and Papua New Guinea have signed an agreement to strengthen aviation accident and incident investigations in the Pacific. The arrangement, announced on 30 October 2026 after a signing in Port Moresby, envisages technical assistance, investigator training and shared resources between Tonga's civil aviation office and Papua New Guinea's Accident Investigation Commission (AIC). It could improve the ability of island states to learn from accidents, but its success depends on implementation. Earlier PNG cooperation with Tonga and other island countries also means it should not be described as the first time these partners have worked together.
What was signed, and by whom?
Regional reporting citing Tonga's Ministry of Infrastructure says a memorandum of understanding was signed in Port Moresby on Wednesday, October 28, by Tonga's Infrastructure Minister Tevita Fatafehi Puloka and Papua New Guinea's Civil Aviation Minister Douglas Tomuriesa.
The agreement links Tonga's Civil Aviation Office with PNG's AIC and covers access to specialist skills, training, technical assistance and investigation resources. Published accounts do not set out the full signed text, budget or binding training timetable, so those details cannot be assumed.
Sources: Tonga signs aviation investigation agreement with PNG · PNG and Tonga partner on aviation safety
Why aviation investigations are different from routine regulation
An accident investigation seeks to establish what happened, why it happened and which safety measures could prevent a recurrence. ICAO Annex 13 makes accident prevention, not allocation of criminal or civil blame, the objective of safety investigations.
That purpose creates a reason to separate safety investigation from commercial operators and, as far as practical, routine regulatory oversight. PNG AIC describes itself as an independent investigation organisation; sharing its methods may help Tonga build capacity while retaining responsibilities under the Chicago Convention.
Sources: PNG and Tonga partner on aviation safety · Accident investigation and cooperation mechanism · Annex 13 accident investigations aim to prevent recurrence
Was this the two countries' first cooperation deal?
No. A Papua New Guinea AIC official said in October 2020 that PNG had been providing regional assistance under memoranda of understanding since 2018, naming Tonga among several Pacific partners.
The 2026 agreement can be reported as a fresh formal step and potential strengthening of cooperation. Available reporting does not establish that it invented the bilateral relationship or superseded all earlier arrangements.
Sources: Tonga signs aviation investigation agreement with PNG · Regional accident investigation cooperation included Tonga since 2018
Tonga has already completed an internationally supported investigation
An official Australian Transport Safety Bureau account documents assistance to Tonga after a December 2023 aircraft taxiway accident. Tonga released its final Annex 13 investigation report in June 2025, supported by Australian technical mentoring.
That earlier case demonstrates why specialist partnerships can matter to small aviation administrations. It also makes clear that the 2026 PNG agreement is part of a longer regional capacity-building effort, not Tonga's first exposure to modern safety-investigation practice.
Sources: ATSB cooperation with Tonga 2023 accident investigation · ATSB annual report on Tonga's first independent accident investigation
What the new agreement might realistically improve
Island states have small aviation systems and long distances between communities. Specialist investigations may require technical equipment, training, accident-site expertise and access to independent laboratories or recorders not economically maintained in every country.
PNG's AIC has experience investigating incidents within its own territory, and officials describe professional training and resource-sharing as aims of the new arrangement. These are intended capabilities, not proof that a team has already been deployed or that future accident rates have fallen.
Sources: PNG and Tonga partner on aviation safety · Accident investigation and cooperation mechanism · Annex 13 accident investigations aim to prevent recurrence
Which milestones would show the deal is working?
Meaningful evidence would include a publicly accessible MoU or implementation plan, scheduled training, specific investigator exchanges, jointly supported investigations, published safety recommendations and measurable improvements in professional capacity.
ICAO's wider Asia-Pacific cooperation framework offers a benchmark for how shared resources and specialist courses should function. For now, the agreement is a confirmed diplomatic and technical commitment; its practical outcomes require follow-up reporting.
Sources: Tonga signs aviation investigation agreement with PNG · Accident investigation and cooperation mechanism · Annex 13 accident investigations aim to prevent recurrence
