Sorting out old photos I came across this one, it was taken some 7 years ago on final to Dublin.. .Observe very carefully at this picture, I may be asking questions
The pic shows a B737-200 wing with either approach or land flap set with vapour coming from the end of the flap, water vapour! nothing unusual in this. or so I thought but look carefully there appears to be a pipe at the end of the flap that looks to be venting the vapour.
As I am pretty certain that the 737 has no fuel dumping system and I really don't think you would be dumping fuel on final anyway. I began to wonder what it was, Is it part of the aircraft that does something else and just looks like is venting or is it some thing on the ground that just happened to be in the right place on the photo.
Any 737 guys out there care to comment ????
Sorry chaps but its been bugging me for days