Link to the forum post explaining how to execute the yo-yo manoeuvre, mentioned in the article. What is interesting was one pilot mentioned that the yo-yo procedure dates all the way back to the 707 for a runaway trim. The 737 was derived from the 707 and 727. The 707 was the first Jet Airliner.
Edited for links : referance to 737-200 Manuel https://www.pprune.org/tech-log/619326-boeing-advice-aerodyn...
https://www.pprune.org/tech-log/619326-boeing-advice-aerodyn...