Final answer:
When adding a type rating to an airline transport pilot certificate, the applicant must demonstrate proficiency in operating the specific aircraft type by passing a practical test in a flight simulator and an aircraft.
Step-by-step explanation:
When a type rating is to be added to an airline transport pilot certificate, and the practical test is scheduled in an approved flight simulator and an aircraft, the applicant is required to demonstrate proficiency in operating the specific aircraft type.
During the practical test, the applicant will be evaluated on tasks such as pre-flight preparations, takeoffs and landings, instrument approaches, emergency procedures, and general aircraft handling.
It is important for the applicant to be familiar with the aircraft's systems, performance characteristics, limitations, and emergency procedures in order to successfully complete the practical test.