The Republic of Korea Army has suspended military flight operations for its LAH-1 Miron helicopters due to significant complications identified in the propulsion systems affecting 82 percent of the fleet. Reports indicate that boroscope inspections conducted by the Defense Acquisition Program Administration (DAPA) uncovered corrosion issues in 47 out of 57 engines that were locally assembled and delivered by Hanwha Aerospace.
In addition to corrosion, hairline cracks were detected in 38 of these helicopters, raising concerns about the structural integrity and safety of the aircraft. DAPA identified that these failures were linked to “abnormalities in the diffuser,” which are crucial aerodynamic components that ensure normalized airflow for the helicopters during flight. The issue reportedly stemmed from a change in the manufacturing process employed by Hanwha Aerospace.
Notably, the French manufacturer Safran, which is responsible for the development of the Miron engines, was criticized for failing to identify these problems during their quality assurance processes. In light of these developments, DAPA has pledged to implement stricter screening measures for all acquired military equipment to prevent similar occurrences in the future.
The LAH-1 Miron helicopters, designed based on the Airbus H155 medium-lift transport system, aim to enhance South Korea’s military capabilities. Each rotorcraft is powered by two HAS-Arriel 2L2 engines, providing an output of approximately 1,030 horsepower each, allowing them to achieve speeds exceeding 130 knots (150 miles or 241 kilometers per hour) and a range of over 500 nautical miles (575 miles or 926 kilometers). The aircraft can operate at altitudes reaching 15,000 feet (4,572 meters).
The LAH-1 Miron is intended to replace the aging fleets of MD 500 and Bell AH-1S Cobra helicopters that have been in service since the 1980s. Over the next eight years, South Korea plans to introduce approximately 160 of these advanced helicopters, with an overall investment projected at 5.75 trillion won (approximately $3.8 billion).
