mast bumping
(aviation) A dangerous condition where the mast of a helicopter contacts adjacent fixed structure while rotating, damaging the mast and potentially resulting in the separation of the main rotor from the helicopter.
plural of hearthful
(economics) A decrease in the value of a capital asset / (business, finance) An amount by which the proceeds of the sale of a capital asset by its owner are less than its cost to the owner.
plural of metalloexopeptidase
自動降下中に突然の振動を感じた後、操縦士はローターマストが近接する固定構造に接触したことでメインローターの取り付けが著しく弱体化していることに気づいた。
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