後方 こうほう らん気流 きりゅうではありませんでした
kōhōrankiryūdewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 後方乱気流

1. It was not rear turbulence.; It wasn't a rear disturbance.

Past/Perfective
Negative
Polite
Formal Register