> the faa and airlines banned pilots from knowing more than 2 (I think) air frames a while ago. The FAA does not limit how many type certificates that a pilot

> the faa and airlines banned pilots from knowing more than 2 (I think) air frames a while ago. The FAA does not limit how many type certificates that a pilot has. However, large airlines have policies that likely do limit their pilots to flying two airliner types. Source: commercially-rated airplane pilot.