Type III door classification is described as?

• A. Plug-type door requiring stepping
• B. Non-plug door requiring passengers to step through one foot at a time
• C. Fully automatic pallet door
• D. Side-hinged arch door

Answer: (B)

Type III door refers to a non-plug door, meaning it doesn’t seal by the door being pushed into the fuselage. The key characteristic is a low threshold that allows passengers to step through one foot at a time, making orderly egress easier, especially in an emergency. This contrasts with plug-type doors, which seal by fitting into the opening and often require a different, inward-outward action to close. The other door types describe different mechanisms or shapes that aren’t aligned with the Type III non-plug, step-through design. So, the best description is a non-plug door requiring passengers to step through one foot at a time.