wrote:

An excellent reminder that there really are good reasons to do a
thorough preflight and to make sure the controls are free. This
happened just north of Winnipeg, and the aircraft was the first version
with PT-6-67 Turboprops. The Canadian DOT concluded that the control
locks were still locked when the aircraft took off.
http://www.jumpingpixels.com/turboprops.html

Certainly not to refute what you say about external/internal
preflight inspections but there's something wrong with this film.

This isn't a Buffalo I think, it's a Caribou with two radial
engines I believe, the Buffalo was derived from the Caribou
though. They installed turbo-prop engines and raised the
horizontal stabilizer to the top of the vertical stabilizer (plus
other changes possibly). You'll notice that the engine sound is
of radial piston type and that the horizontal stab is far down on
the vert. stab. The tape was made at Gimli Manitoba (where they
did ihe conversions from piston power to turboprop power.)

That's Gimli Of "Gimli Glider" fame of course...
--

-Gord.
(use gordon in email)