I remember this...
American took the plane to avoid repo, or as a repo, if I remember right.
Inexperienced pilot in way over his ability, in a complicated airplane, a sure recipe for disaster. They likely went down in the deep jungle near South Africa, or somewhere around the Seychelles.
We don’t know exactly how much fuel is on board. For all we know they might have had the tanks topped off instead of getting their 6 hours worth they might have been allotted which could take it up to 9,400 nautical miles depending on the model.
I suspect it could have gone to Somalia, Yemen, or somewhere in that general vicinity.