What action should be performed after shutting off the affected thrust lever during a no light off?

After shutting off the affected thrust lever during a no light off scenario, the correct action to take is to turn off the ignition. This is crucial because a no light off situation indicates that the engine has not ignited properly and may still be in a state where unburned fuel is being injected into the engine. By turning off the ignition, you prevent the potential for an explosion or fire caused by fuel igniting unexpectedly.

Turning off the ignition ensures that the engine system is safeguarded from risks associated with continued fuel flow and lack of combustion. In a no light off condition, it's essential to avoid any actions that could lead to an uncontrolled ignition of the fuel in the engine.

Actions such as performing a visual inspection, checking the fuel gauge, or notifying ground control may be part of the broader procedures following engine shutdowns, but they do not directly address the critical need to manage the immediate hazards presented by the no light off condition. Prioritizing the safety of the cockpit and aircraft is paramount, and shutting off the ignition effectively mitigates this risk.