A major safety concern has emerged over South Korea's next-generation Light Armed Helicopter, Mireon (LAH), after serious engine defects were found, raising questions about defense procurement and quality control.

The Defense Acquisition Program Administration approved these components despite high defect rates, and 15 helicopters equipped with these engines had already been deployed to an Army aviation training unit for pilot training.

The defects are tied to the diffuser, an engine component using Safran-origin technology that is domestically assembled, with observers suggesting prescribed manufacturing and assembly processes may not have been fully followed.

The incident threatens the Army’s modernization plan to replace aging MD 500 Defender and AH-1S Cobra with about 160 LAH units by 2031 and has already disrupted training schedules, affecting operational readiness.

Of 57 engines delivered by Hanwha Aerospace, 47 engines (82.4%) showed severe corrosion and 38 engines (66.6%) had critical structural cracks, indicating widespread problems in the powerplant components.

Abnormalities were detected as early as April, but flight operations were not suspended until May, prompting concerns about the timeliness of safety responses.

There are growing calls for a comprehensive review of procurement and inspection processes, along with a thorough investigation to determine accountability and strengthen safeguards against future issues.

Experts warn that the defects reflect broader systemic issues in defense procurement and quality assurance, underscoring the need for strict adherence to manufacturing standards and rigorous inspections in aviation systems.