Which door is indicated by the code L2?

The code L2 refers to the second door located on the left side of the aircraft, which aligns with the industry standard for designating aircraft doors. In this context, "Aft Door" signifies that it is located towards the back of the aircraft. Therefore, L2 indicates the Aft Door on the left side of the aircraft, making option D the correct answer.

Identifying doors using a code like L2 is common practice in aviation, where the letter indicates the side of the aircraft (L for left and R for right), and the number indicates the position of the door from front to back. Understanding this coding system is crucial for safety and operational procedures, enabling crew members and ground staff to communicate clearly and effectively about door locations.