I assume you mean that it has disappeared inside the mast
. And when you pull down on the halyard
, it does not come out. Is this correct?
If so, .....
1. Try and work out where the end is, based on the length of the halyard and how much comes out the bottom. If you don't know how long it was, can you look into the mast through any other sheave and use a torch and mirror to see what halyards are hanging at that height?
2. If you know approx where it is, you should be able to use logic and mast geography to work out what is jamming it.
3. If it is jammed by another halyard, loosen that halyard. Give them all a shake. If it is a fitting, pull it out. Then shake and pull down on your spi halyard.
4. Still doesn't come down? Ok, go sailing on a rough day, bash your boat to windward, give everything a good shake including your fuel tanks
and see what falls out of the mast.
5. Still no good? Ok, cut it, run another halyard through and one day, when you pull the mast out, you can go fishing
for the end. If it fouls up something else in the meantime, well, you will have to pull the mast all the sooner.