Originally Posted by
emcampbe
If the sound is the same thing I'm thinking of, I never thought of it as a barking dog, but kind of like someone taking a saw back and forth, back and forth. The good news is every time I hear it, it is after the plane arrives at the gate , so I am not worried. If I ever hear it before the plane is supposed to pull away from the gate....that might be another story.
The barking dog noise and what I think you are referring to are probably the PTU.
I was referencing the "clunking" noise another poster mentioned. The "clunk" that I hear is the brakes, but the problem may be in how I describe "clunk" versus how any of the other posters here parse "clunk."