The article contradicts itself on this. Early on, it says the rescuing pilot referred to "part of a checklist that all pilots are required to memorize". Later,

The article contradicts itself on this. Early on, it says the rescuing pilot referred to "part of a checklist that all pilots are required to memorize". Later, it quotes claims that it "isn't in the documentation". I would consider that published, official checklists are the most imminently critical form of documentation.