General Authority of Civil Aviation (GACA) Aeronautical Information Publication (AIP) Practice Exam

In Alternate mode, how do slats and flaps extend?

1. Simultaneously

2. Sequentially

3. Independently

4. Only flaps first

The correct answer is: Simultaneously

In the Alternate mode, slats and flaps extend simultaneously. This means that both mechanisms operate at the same time rather than waiting for one to fully extend before the other begins its operation. This form of operation ensures an efficient aerodynamic performance and enhances lift during critical phases of flight, particularly during takeoff and landing. Simultaneous extension can be crucial in situations where pilots need to quickly achieve the desired lift characteristics without delay, such as in emergency scenarios or during specific flight conditions where rapid changes in lift are necessary. While the other options suggest different methods of operation, they do not reflect the design and operational principles that many aircraft employ in Alternate mode, where the simultaneous action of slats and flaps serves to optimize performance and safety.