What light indicates that the PCL is in the start position?

The correct answer is the green "ST READY" light, which indicates that the Power Control Lever (PCL) is in the start position. This specific light is designed to provide clear visual feedback to the operator that the system is prepared for the starting process. When the PCL is set to the start position, it's crucial to have a confirmation signal, and the green light serves this purpose effectively by signaling readiness for starting the engine.

In the context of the aircraft's systems, having distinct color-coded indicators is essential for operators to quickly assess the status of various systems without confusion. The green color is generally associated with safety and readiness, reinforcing the idea that the system is primed for operation. This designation helps to streamline the start procedures and enhances situational awareness during engine start sequences.