Originally Posted by
SLF3
So the engine nacelle won't contain a blade failure. Are the rudder cables on the 737 NG vulnerable to blade impact damage, or is that a Max specific issue?
Yes, they are, to all models of 737. That may not be WHY Boeing is getting busy with the cowling issue, but the cables will be somewhat better protected if the cowling improvements work.
One issue is how FAA managers agreed during certification of the 737 MAX to give Boeing a pass on complying with a safety rule that requires more separation between duplicate sets of cables that control the jet’s rudder.This is to avoid the possibility that shrapnel from an uncontained engine blowout could sever all the cables and render the plane uncontrollable.The requirement was introduced when such a blowout caused the deadly 1989 crash of a United Airlines DC-10 in Sioux City, Iowa. The 737 has never been brought into line with the requirement, and when Boeing updated to the 737 MAX it argued once again that design “changes would be impractical” and expressed concern about the potential impact on “resources and program schedules,” according to documents submitted to the FAA.
https://www.seattletimes.com/busines...87-dreamliner/