A full order book for now doesn't mean that future sales won't decrease and the article sort of demonstrates that. What you are highlighting is just a lag time of 2-3 years.
Right; these things are usually done over long time horizons. Actually that is also why such type of industry wide economic wars are phased in over time.
I'm certain that if push comes shove, PRC can decide on just as devastating tariff regimes as USTR with some notion of extraterritoriality. Each structured in a way to impact the entire supply chain, or as much as it is convenient to enforce. Those could be phased in over several years, to lessen the impact on other nations, for them and the domestic players to make gradual switch over time.
Some large and significant sectors that can be targeted would obviously include commercial airspace. A major increase in airspace transit fees as well as airfield slot fees for American made commercial aircraft probably would be the long term death knell to the Boeing long haul fleet (787 + 777X), which could potentially lead to the collapse of the firm, prompting some type of government intervention.
Another area potentially are new costs imposed on financial transactions that go through the US, although it would also hurt the available liquidity in PRC markets as well. Those can be variably imposed on various types of asset classes, brokerage services, underwriting activities, structured finance, etc, to maximize the impact on US financial sector while minimizing domestic impact. Over time, this would actually be a significant force in shifting financial activities in the West toward London, Frankfurt, and other centers, leaving a big hole in the US economy.
There are many other examples, such as petrochemicals products, refined fossile fuels, fossile fuel exploration and drilling services, brand name pharmaceuticals, automobile components, medical equipment and components, industrial electronic instruments, agricultural products, etc.