Originally Posted by
FlyingNasaForm
Yes a person can fly as an SIC with a PIC type rating. Lots of airlines type their FOs.
A type rating (PIC or SIC) can go on a Private, Commercial or ATP certificate.
One interesting thing though - a single pilot type is different than a crew type. I have a C-510S (Citation Mustang) type as a single pilot. I CAN'T legally fly as a flight crew with someone who has a C-510 type unless he/she isn't functioning as a crewmember. Strange huh?