Acting Head of the KNKT Aviation Accident Investigation Subcommittee Henry Poerborianto said the body conducted 19 investigations during the year, comprising nine accidents and 10 serious incidents.
“Of the 19 investigations, runway excursions were the most frequent occurrence,” Henry said at a performance briefing in Jakarta on Wednesday.
He said a runway excursion occurs when an aircraft is unable to stop safely on the runway or departs runway boundaries during takeoff or landing.
Based on KNKT classifications, runway excursions accounted for seven cases, followed by system or engine component failures with three cases and abnormal runway contact with three cases.
The committee also recorded two turbulence-related incidents, two controlled flight into terrain cases, and one incident each involving fuel issues and air navigation or traffic management services.
Between 2021 and 2025, KNKT’s aviation subcommittee investigated 105 aviation occurrences, including accidents and serious incidents.
In 2025, the number of aviation investigations declined from the previous year, with total fatalities recorded at 12 people.
KNKT highlighted three major incidents in 2025, including an Airbus H145 helicopter crash in Central Kalimantan and an AS350B3 helicopter accident in Central Papua.
The third notable case involved an engine failure on a GA 8 Airvan aircraft that made an emergency landing in Karawang, West Java.
During 2025, the aviation subcommittee completed six final investigation reports and prepared three draft final reports undergoing consultation with relevant stakeholders.
From the completed reports, KNKT identified safety issues including suboptimal use of flight data to monitor pilot and aircraft performance.
The reports also cited weaknesses in operational procedures, such as inconsistent use of landing checklists and improper application of unstable approach criteria.
“Some operators already have procedures, but implementation is not always consistent in the field,” Henry said.
Crew fatigue management was also flagged as a safety concern requiring stronger technical guidance and closer oversight of implementation.
Based on its 2025 findings, KNKT issued 16 safety recommendations, most of them directed at aircraft operators and relevant authorities.
KNKT Chairman Soerjanto Tjahjono said the recommendations aim to prevent similar accidents from recurring.
“We urge operators and authorities to follow up on these recommendations so accident risks can continue to be reduced,” he said.
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Translator: Aria A, Rahmad Nasution
Editor: Primayanti
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