What steps should be followed to open the flight deck window on the ERJ 175 in an emergency?

The correct approach for opening the flight deck window on the ERJ 175 in an emergency involves pressing the red lock button and then pulling the handle inward and backward. This procedure ensures that the window is properly unlocked before any physical attempt to open it.

Pressing the red lock button disengages the locking mechanism which secures the window, allowing it to be opened safely. After unlocking, the handle must be pulled inward and backward; this motion is designed to facilitate the window's opening in a manner that adheres to safety protocols. These steps are crucial in an emergency to ensure that the flight crew can quickly access fresh air or communicate with outside resources as needed.

Other options do not encompass the necessary steps needed and may not ensure the window is opened safely or effectively. For example, simply pulling the handle may result in failure to unlock the window, while relying solely on the escape rope does not directly pertain to the window's operation. Turning a knob to unlock is not part of the ERJ 175's flight deck window design, making the chosen procedure essential for effective operation in emergency scenarios.