Which statement about doors 3L/R is true?

Which statement about doors 3L/R is true?

• A. Doors 3L/R are always armed
• B. Doors hinge on top
• C. Doors open outward toward cabin
• D. Doors have no emergency slides

Answer: (A)

The main idea here is how door slides are managed for quick evacuation. Doors that have slides are arming-dependent: arming sets the door so that if it’s opened during an emergency, the slide automatically inflates and provides a rapid escape route. For doors designated as the aft passenger exits (the 3L and 3R doors), the evacuation path is a primary concern, and the system is designed so these doors are kept ready for immediate use. In this aircraft configuration, those aft doors are configured to be always armed, so the slides will deploy if the door is opened in an emergency. That’s why the statement about them being always armed is considered true. In contrast, other door characteristics can vary by design and type, such as how a door is hinged, whether it opens inward or outward, and whether any door has a slide at all—these details aren’t universal across all aircraft. But for the specific 3L/3R doors in this context, the requirement is that they stay armed to ensure a rapid, ready evacuation.

The main idea here is how door slides are managed for quick evacuation. Doors that have slides are arming-dependent: arming sets the door so that if it’s opened during an emergency, the slide automatically inflates and provides a rapid escape route. For doors designated as the aft passenger exits (the 3L and 3R doors), the evacuation path is a primary concern, and the system is designed so these doors are kept ready for immediate use. In this aircraft configuration, those aft doors are configured to be always armed, so the slides will deploy if the door is opened in an emergency. That’s why the statement about them being always armed is considered true.

In contrast, other door characteristics can vary by design and type, such as how a door is hinged, whether it opens inward or outward, and whether any door has a slide at all—these details aren’t universal across all aircraft. But for the specific 3L/3R doors in this context, the requirement is that they stay armed to ensure a rapid, ready evacuation.