Cục Hàng không Mỹ điều tra sai sót tiềm ẩn trong quy trình sản xuất của Boeing
Theo Cục Hàng không Mỹ, Boeing có thể không đảm bảo sản phẩm của mình tuân thủ thiết kế đã được phê duyệt, trong điều kiện vận hành an toàn theo quy trình kiểm tra, thử nghiệm của hệ thống chất lượng.
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