i dunno about that. i am also not much of a PL omaha player; if anything i am a bit of a Omaha H/L FL player. but i'm just thinkng about this hand out loud a little (sort of).
while AKK7 was pretty preflop, even AK27 would be better after that flop i think, as it will make aces full more often (assuming you are not against AJ). omaha is game of redraws, and i don't see a lot of them with this hand. most likely, you will go to a showdown wilth trips because it looks to me like there are only 4 outs to aces full or better and 6 outs to kings full or better (where the hypothetical AK27 has 10 outs). even if you are against another ace, i think it is probably a better ace in that it draws to aces full better, and even one of two kings will only give you kings full.
i haven't made that venture into PL omaha myself, but i find the game interesting. i'm looking forward to more opinions on your question. to actually answer it myeslf, though: sorry i can't. i don't know if you should fold it. i haven't ventured into the game yet because this is exactly the kind of situation i wouldn't know how to react to. i guess it also depends how deep your stacks were.