Question

The windshield may fog rapidly under conditions of very high aircraft descent rates and high humidity. In such conditions, consider preheating the windshield by placing the DEFOG handle to ______ and, if necessary, by placing the WINDSHIELD switch to either _________ or ________.

Answer 1

In conditions of high descent rates and humidity, preheating the aircraft's windshield with the DEFOG handle and the WINDSHIELD switch to LOW or HIGH settings helps prevent fogging.

Step-by-step explanation:

The windshield may fog rapidly under conditions of very high aircraft descent rates and high humidity. To prevent this, it's important to take preventative measures by using the aircraft's defogging system. You should consider preheating the windshield by placing the DEFOG handle to an appropriate setting, which will vary depending on the aircraft's systems, but typically may be 'ON' or 'HIGH'. Additionally, if necessary, you can place the WINDSHIELD switch to either a 'LOW' or 'HIGH' setting. This will engage the windshield heating system and help prevent the formation of fog.

Using the windshield heating system effectively can help maintain visibility during critical phases of flight. It's important to remember to use this system ahead of time, as the defogging and deicing capabilities work better when used proactively rather than reactively.