Which option is NOT one of the three components of the terminal system?

• A. Flight Interface
• B. Passenger Processing
• C. Access Interface
• D. Aircraft Maintenance

Answer: (D)

The terminal system is built around three ways it handles information and passenger flow: the flight interface, which coordinates flight data and gate status; passenger processing, which covers check-in, security, and boarding; and the access interface, which manages how passengers move through entry points, security lanes, and toward gates. Aircraft maintenance does not fit this grouping because it deals with keeping the aircraft itself airworthy and is handled by maintenance operations outside the terminal’s information and passenger-flow components. So the option that isn’t part of the terminal system is Aircraft Maintenance.