2 sentences

1. 由于引擎故障，飞机不得不紧急迫降。

   yóu​yú yǐn​qíng gù​zhàng, fēi​jī bù​dé​bù jǐn​jí pò​jiàng.

   The plane had to make an emergency landing due to engine failure.

   Source: Dong Chinese Dictionary

2. 飞机的液压系统突然失效，导致紧急迫降。

   fēi​jī de yè​yā xì​tǒng tū​rán shī​xiào, dǎo​zhì jǐn​jí pò​jiàng.

   The aircraft's hydraulic system suddenly failed, resulting in an emergency landing.

   Source: Dong Chinese Dictionary