On the B727, these would be called "Flap Actuator Jackscrew Fairings"
You can actually dispatch with these missing, after consulting the book.
(Reduction of Field Length Limit and Approach/Landing Climb limit of 100 lbs
is necessary, according to my manual)

"Bucky" wrote in message
ups.com...
What are those pointy things hanging from the flaps called? And what do
they do exactly?

http://boeing.com/companyoffices/gal...747400-14.html