precautionary landing meaning in Chinese

预防性紧急著陆
预防性着陆

A private helicopter made a precautionary landing at sai kung yesterday ( may 30 ) , a spokesman for the civil aviation department ( cad ) said . no one was injured and no property was damaged
一架私人直升机昨日（五月三十日）于西贡飞行时作出预防性降落，民航处发言人说事件中无人受伤，亦没有设施受损。
At noon yesterday , a privately owned ec120b helicopter experienced a directional control problem while flying over the high island reservoir near sai kung , and the pilot made a precautionary landing on the grass near the chong hing water sports centre
昨日（五月三十日）中午十二时，一架ec120b型号的私人直升机，于西贡万宜水库附近飞行时，因方向控制出现问题，机师在创兴水上活动中心附近的草地作预防性降落。