Dan, Unfortunately they all crack at that location.
I have seen a number of repair methods used to piece together these fairings
after they have cracked.
Some of these include using baffling material riveted to the fairings on the inside across the crack
to aluminum strips riveted in place.

I bet Hung even has pictures. grin


Ron Stewart
N5282B
KSFZ


[Linked Image from visitedstatesmap.com]