Collision during night-time drill caused deadly Japanese helicopter crash

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Collision During Night-Time Drill Caused Deadly Japanese Helicopter Crash
Japanese helicopter, © The official website of the Japan Maritime Self-Defense Force
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By Mari Yamaguchi, AP

Japanese investigators have concluded that a collision during a night-time drill caused a deadly crash involving two Japanese navy SH-60K Seahawk helicopters last month, the country’s defence minister said.

Minoru Kihara said this is according to preliminary flight data analysis, adding that what exactly led to the collision is still being investigated.

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Mr Kihara ruled out mechanical failure of the SH-60K Seahawks from the Maritime Self Defence Force and announced that the exercises, which were halted following the crash, would resume on Friday.

The two SH-60K reconnaissance helicopters carrying a total of eight crew lost contact late on April 20 during night-time training east of the island of Torishima in the Pacific Ocean, about 370 miles south of the capital, Tokyo.


Japan Helicopters Down
A search takes place near the site of a crash in the Pacific Ocean (Kyodo News via AP)

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One of the total of eight crew on the two helicopters was found in the water and later pronounced dead, and the search for the seven missing, as well as the aircrafts’ fuselages, has continued since then.

The seabed at the crash site is about 3.4 miles deep and the recovery is considered a challenge. A navy oceanographic ship JS Syounan has been deployed since late April in the search.

Mr Kihara said that a preliminary examination of the flight data recorders determined a collision caused the crash.

The helicopters’ flight data showed a “rapid and huge impact” simultaneously at the same location, evidence of the collision, he said.

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There was no indication of any malfunction in the aircrafts’ mechanics.

The two helicopters were believed to have come too close during what was a drill on anti-submarine warfare, involving multiple helicopters hovering and lowering sonars into the water. Some media reports have said an anti-collision alarm system was not used, possibly due to training for harsh environment conditions.

Mr Kihara said SH-60K and its earlier variation would resume exercises on Friday but only for solo flights. More than 70 of the twin-engine, multi-mission helicopters developed by Sikorsky have been modified and produced in Japan by Mitsubishi Heavy Industries.


Japanese helicopter
The aircraft crashed in the Pacific Ocean south of Tokyo during a night-time training flight( Tte Japan Maritime Self-Defence Force via AP)

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Japan is accelerating its military build-up under a new security strategy adopted in 2022, fortifying its defences on south-western Japanese islands in the Pacific and East China Sea to counter threats from China’s increasingly assertive military.

In recent years, the country has also rapidly expanded its own naval exercises and joint drills with the United States and other partners.

“We cannot let our guard down even for a moment,” Mr Kihara said, adding that a resumption of the exercises was necessary to keep up the skills of the crews.

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This type of helicopter has been involved in a number of accidents during night-time training flights, including a fatal crash in 2017 and a collision off the southern island of Amami Oshima in 2021, when no injuries were reported.

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