The fairings are painted red at the tips, look:
I have seen that on many new airplanes, not only the A330. So why are they painted red?
Aviation Stack Exchange is a question and answer site for aircraft pilots, mechanics, and enthusiasts. It only takes a minute to sign up.Sign up to join this community
Elaborating on Peter Kämpf's comment: The flashy tips are for preventing accidents during ground handling operations, e.g. by belt loaders. This can be a painting or an adhesive tape (possibly reflective, useful at night).
According the pages referenced below, this is done for the A320 family aircraft for which the flap track canoe fairings are not low enough to be obvious, not high enough to not cause a problem.
It seems this is a company decision not required by regulation. Several airlines do it.
Variations on the painting (taping):
References (non authoritative):
When Southwest Airlines started flying Boeing 737 Next Generation, many years ago, now, they used the same red as on the underside of their "Corndog" scheme for the flap track fairings of the NG models. So ground crew would easily know whether they were receiving a "Classic" or an "NG".