Boeing announced Thursday up to 50 of its popular 737NG planes had been grounded after cracks in them were detected, in another blow to the US aircraft maker following two deadly crashes.
Australian national carrier Qantas became the latest airline to take one of the planes out of the air, as it said it would urgently inspect 32 others but insisted passengers had nothing to fear.
The announcement by Qantas came after authorities in Seoul said nine of the planes were grounded in South Korea in early October, including five operated by Korean Air.
