Originally Posted by
MarkerInbound
For airplane pilots, unless you are transitioning from a Canadian license, there are just two ATP knowledge tests. The ATS for the single engine rating and the ATM for the multi rating. The ATM focuses more on part 135 rules and operations while the ATM is focused on part 121 and transport jets.
Unless it’s changed, which may well be the case, you don’t need to do a SE ride. You can just do the ME ride. I know I’ve both trained and done ME ATP check rides for foreign pilots who had no other FAA cert. Mind you, people still used rotary telephones back then.