Large airplanes may have a third pilot, the flight engineer . The duties of the flight engineer include preflight checks and monitoring the mechanical and electrical systems. There are several types of airline ground crew . Some work with the passengers while others work on the plane. Skycaps, ground attendants, ticket agents, and passenger service agents all work with passengers.
Skycaps help passengers with their luggage.
They may check in baggage at the terminal entrance or help passengers bring their luggage into the terminal. Ground attendants answer questions about fares, help locate lost baggage, and explain missed connections. They also help passengers who are ill or in need of a wheelchair. Ticket agents work at the airport ticket counter where they check in passengers. They examine passengers' tickets, answer questions, and check in the baggage.