Requisitos do certificado médico da FAA são :
Medical certificates are designated as first-class, second-class, or third-class.
- First-class is designed for the airline transport pilot
- Second-class for the commercial pilot
- Third-class for the student, recreational and private pilot
Chegando à sua pergunta, este site declara (meu destaque) :
... the ICAO naming structure for the various classes of medicals does not fit with that of the U.S. Under the ICAO definition, a second class medical applies only to holders of private pilot licenses.
In most States, outside of the U.S. and Canada, it is easier to simply carry a valid first class medical rather than trying to explain to a foreign inspector that a FAA second class medical equals an ICAO class 1 medical.
Para mais informações, leia este PDF .