/ a# C& A& Z/ c" a( u$ zCanada and the United States joined authorities around the world on Wednesday and grounded the Boeing Max 8 and Max 9 aircraft, days after the Ethiopian Airlines crash that killed 157.
% f0 e- I# a* O F这是从6park上看到的6 K! R# k1 R0 c; x* Z! B. c
! Y. X+ x- H A& R W9 G- S- Z737设计比较早,当时都是小函道发动机,直径比较细,所以737的起落架设计比较短。 737NG时换装大函道发动机,粗了很多,波音采用的补救方法是把发动机底下削平。 这次737MAX,换更粗更重的发动机,削平也搞不定了。6parker.com; U$ ?# x' B7 z/ o. H