When the T-handle is moved to the ARM position, which of the following occurs?

When the T-handle is moved to the ARM position, the system is configured to prepare for flight operations, specifically with regard to the fuel system. Moving the T-handle to ARM initiates a series of actions that lead to the shutting off of fuel to the engine. This is a safety measure designed to prevent unintentional engine start or fuel flow, ensuring that the aircraft remains secure until all pre-flight checks and preparations are completed.

The T-handle serves as a control mechanism that manages fuel flow. In scenarios where the aircraft might be prepared for pre-flight checks or maintenance, shutting off the fuel flow eliminates the risk of inadvertent ignition or engine start, which could lead to hazardous situations.

Other actions related to the T-handle, such as starting the engine, opening nacelle doors, or increasing hydraulic pressure, are not triggered by moving the T-handle to the ARM position, reinforcing the importance of the correct sequence of operations during aircraft operations.