How to say “Our aircraft has been waiting on the taxiway for twenty minutes; what's causing the delay?” in Japanese

In Japanese

うちの飛行機(ひこうき)、もう二十分(にじゅっぷん)も誘導路(ゆうどうろ)で待(ま)ってるけど、何(なん)でこんなに時間(じかん)がかかってるの？

Uchi no hikōki, mō nijuppun mo yūdōro de matteru kedo, nande konna ni jikan ga kakatteru no?