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Originally posted by Drustew
Sadly i have only seen the "black line" once am afraid. They spray all the time around there so it'll just be a matter of time before i see that again. Am still at work at the moment so more details to come but it appears this might be more common than i first thought! Link below
Originally posted by CastleMadeOfSand
Next time have a camera ready. It will more than likely happen again. CATCH IT!
Otherwise, I have never head of this
How thick do you think the black line was? Was it thicker than the plane?
Where did it originate from?