Korea marine helicopter crash
Hello. Do you remember the fatal accident of Korea marine helicopter in July ?
6 marines were dead for this crash.
Ministry of defense officially said that was the crack of rotor mast which was made by Aubert&Duval (france company)
“The interim results will be reported to the Ministry of National Defense this week before announcing them by Sept. 17,” a Marine Corps spokesman said. “Investigators have tentatively concluded that cracks in the rotor mast of the Marineon was a main cause of the crash.”
A member of the investigation team told Defense News that his team had found defects in a set of three rotor masts imported from Airbus during parts inspections.
“We found that the strength of a set of three rotor masts imported from Airbus was far lower than the standard, and one of them were confirmed to have been fitted in the crashed Marineon,” the investigator said, speaking on condition of anonymity. “Two other rotor masts in question were fitted in two other Surion troop-carrying helicopter[s] flown by the Army.”
The investigator said Airbus officials have confirmed the defects in the rotor masts.
Their scenario is..
the cracked rotor mast was broken by vibration > one of the rotor blade hit the body and took off > the rest of the blades and mast were took off from head
But as I see this picture and video clip, one blade took off from head first
it is not the blade, that is the blade sleeve! one of the blade sleeve was entirely cut off.
Even though the blade hit the body, blade sleeve could be cut off like that ????
I think that the blade sleeve had also fatigue crack.
Korea ministry of defense didn't investigate on this blade sleeve. they only blame on Airbus helicopter with the cracked rotor mast.
But the rotor blade parts for KUH made by KAI (Korea Aerospace Industries)