Thanks you made me read 2 more. And kept me up late! There is one where some safety feature highly recommended for all planes back in the 90s (I think), to iden

Thanks you made me read 2 more. And kept me up late! There is one where some safety feature highly recommended for all planes back in the 90s (I think), to identify and alert which engine failed, wont be added to 737s because you guessed it: type certification. It is fascinating and a bit scary.