帰還 きかん不能 ふのう限界 げんかい てんだったら
kikanfunōgenka itendattara

Noun
Da Copula

The "-tara" conditional form ("if/when…") of 帰還不能限界点

1. If/when the point of no return is reached.; If/when the return limit is exceeded.

Tara Conditional