The Turkish RF-4E shot down by Syria on Jun. 22, was probably gunned by a shore-based anti-aircraft artillery battery while it was flying inside the Syrian airspace.
Therefore, the U.S. version of the episode is in tune with the Syrian account (at least for what deals with the position of the aircraft when it was hit) of the mishap, rather than the Turkish one.
This is what the U.S. intelligence/defense sources indicated to the Wall Street Journal that, in an article published on Jun. 29, also confirmed The Aviationist’s early hypothesis that the Turkish Phantom was flying a mission aimed at probing Damascus air defenses.
Although how the American officials have gathered specific details about the position of the plane remains a sort-of mystery (an ISR – Intelligence Surveillance Reconnaissance – and/or an AEW – Airborne Early Warning platform spying Syrian activities might have recorded something) such embarrassing discrepancies emerge while Ankara amasses rocket launchers and anti-aircraft guns along its border with Syria as a reaction to the downing of its fighter jet (whose crew members have not been recovered yet).
Make sure to monitor this link to read all the past and future stories on this topic: https://theaviationist.com/category/turkish-rf-4e-shot-down/