What can be done if the Ng falls below 50% for MOR usage?

When the Ng (gas generator speed) falls below 50%, this indicates that the engine is not producing sufficient power for normal operations. In this scenario, utilizing starter assistance is the appropriate action. Starter assistance allows the engine to receive additional support to help recover and stabilize the power output. This is crucial during critical phases of flight or when operational parameters are not met.

In contrast, using the emergency fuel pump would be more relevant for fuel delivery issues rather than addressing low Ng specifically. Activating the engine fire suppression system is a safety measure for fire occurs, and it would not directly assist in increasing Ng. Adjusting the torque lever alone would not effectively resolve low Ng conditions; it may even exacerbate the situation if not managed properly. Utilizing starter assistance specifically targets the need to boost engine performance when Ng drops below the critical threshold.