it should not be any problem flying with your eardrum
perforated. in fact it should decrease the pain that is generally caused by air pressure changes during flying as there remain no pressure difference between middle ear cavity and external environment.
the only care should be to keep ears free of infection, by keeping them dry, avoiding pools practicing hygiene.
it should also not hinder in persuing his sports interests.
so let him go ahead with his trip but should continue his medicines as advised.
thanks for the query
Dr. Amit Kumar