A320
Hello,
Recently I did a couple flights on an A320, window seat about 20% chord. Both times there has been this really strange sound like a dog barking in the hold on push back. Obviously not because it has happened twice. I think it is possibly something to do with hydraulics maybe? Can anyone explain this?
Also one other thing which I cannot explain is that I was looking out the window in the cruise (I also noted this on a B777) and noticed a sharp vertical line of what looked like the difference between two mediums of air. About 20% chord, illusion? Maybe I'm not sure. Both times the sun was at different angles.
Thanks in advance