Which aircraft requires a Deice Operator to verify the configuration of the horizontal stabilizer before treatment?

The Embraer 140-145 and ERJ 170-175 aircraft require a Deice Operator to verify the configuration of the horizontal stabilizer before treatment due to their specific aerodynamic design and de-icing procedures. These aircraft feature horizontal stabilizers that can have their positions adjusted, which impacts how ice may form and affect flight parameters. Ensuring the correct configuration before applying de-icing fluid is critical to maximizing the effectiveness of the de-icing process and maintaining safety in operations.

In the case of other aircraft, such as the Boeing 737, Airbus A320, and Bombardier Dash 8, their designs and de-icing procedures may not necessitate the same level of configuration verification concerning the horizontal stabilizer. Each type may have its distinct methods of addressing ice accumulation, but the specific requirement for the Embraer models emphasizes the need for thorough checks to adapt to the aircraft's unique characteristics. This highlights the importance of following the manufacturer's guidelines to ensure safe and efficient de-icing practices.