Wiktionary
gone down on
vb. (past participle of go down on English)
Usage examples of "gone down on".
If something had gone down on Barroni's usual route home someone would have heard or seen something.
Had Commodore Oroton been able to field this army, today's setting sun might well have gone down on a very different scenario.
His worn, exhausted face had shouted it to the universe, and he'd gone down on his knees to face Samantha.