Where should the Aircraft Out of Service placard be placed?

• A. Right cockpit window
• B. Inside the cockpit near the door
• C. On the outside of the aircraft
• D. Left cockpit window

Answer: (D)

The key idea is ensuring that an Aircraft Out of Service placard is clearly visible to those preparing and inspecting the aircraft from the outside. Placing it on the outside of the aircraft, specifically in the left cockpit window area, makes it easily seen during walk-arounds and preflight checks by ground crew and maintenance personnel. The left-side location is the standard spot that remains visible from typical approaches to the aircraft, keeps the placard readable even with doors and stairs in place, and avoids hiding the notice inside the cockpit. Placing it inside the cockpit or on the right side would not serve the purpose of marking the aircraft as not in service for external personnel, and simply putting it somewhere on the outside without specifying the window location could reduce visibility or consistency with standard practice.