Not too many T47/488 owners on this forum, but we looked at a couple of them. Is this a deck salon
model with the large coach side windows ?
The staysail track is right above the pair, on each side. I would have thought those window frames/gaskets would leak, before the staysail track attachments. Not too many on this forum would have a need to remove these, I doubt.
You say unfortunately it was bolted but the bolt dropped away in side the deck. Was it a machine screw or wood screw ? The bolts are not secured, meaning you can turn them past tight, like the threads are stripped ? More than just the one you mention ?
If a machine screw (most likely), every 3-4 inches along the track, then possibly there is a cast in (into the laminate) flat bar that was matched drilled to the track with its hole spacing, so that the screws just thread into the bar (one long insert).
This area of the cabin
roof most likely has a plywood core
. Is the hole wet inside, or too much rain to tell ?
If a flat bar was built into the laminate and is drilled and tapped for bolt threads that are now stripped, then you can tap the bad one to the next size (SAE) since boat is METRIC most likely in this area.
I haven't pulled the ceiling panels
down on the Taswell to see all this stuff, so don't know if ours are through the coach roof panel with washers and nuts, a flat bar on the inside, or like I was suggestiing above, since you can't find the entry holes for the hardware
on the inside.
Keep this area very dry until you figure it all out, the best you can. Have a blow dryer on board ?
All the best to your endeavors.
There is a subforum on deck hardware
you should post on.