Well i dunno if it is related or not to myself destructing some of the Memorial structures to get in there, but i reloaded an old save before entering system as suggested, tried a few times to get to the memorial by shooting stuctures nothing droped, tried to get in (from the bottom, after multiple new saves made when in system) without shooting at structure and now each time i'm getting 2 precursors guns + 1 precursor fighter + 1 precursor skull and some alien gun + missile. Damn precursor spirits
and the ship is not usable, it is a "cargo" item, like the skull btw.