I have some doubts about this article, especially the phrase
If the engine really fell off, surely this landing should have been quite a challenge."It was an emergency landing for safety reasons, but such a landing is absolutely no problem for an experienced pilot"
Also, doesn't the Dash-8 carry its landing gear in the engine nacelles?
Was a 3-wheel landing still possible?
Frankly, this looks like one more example of poor journalism, is there better info available?