If you go to this page your question will be answered

http://www.gliding.co.uk/bgainfo/tec...urers/grob.pdf

AD 91-5/2, SB 306-29 issued in 8/91. This should have been completed 17
years ago, I can't believe the FAA is that slow.




At 15:39 19 August 2008, Gary Emerson wrote:
chipsoars wrote:
On Aug 19, 10:47 am, Gary Emerson wrote:
Gary Emerson wrote:
I heard an AD was being considered for the wing spigots on the Grob
102s
(US version AD). Any definite info on where this is headed and
when?
Thanks,
Gary
Does anyone know where a copy of the service bulletin from grob might
be
found online? I googled this quite a bit, but so far no luck coming
up
with the actual document. Even the Grob website doesn't list the
SB...

http://www.grob-aerospace.com/servic...ort/g-102.html



Right, there is a master list, but on the left side SB 306-29 is NOT
shown unfortunately.