How are the fuel pumps selected during engine start?

How are the fuel pumps selected during engine start?

• A. Manually by the pilot
• B. Automatically to Standby pump during start, then to Normal pump after engine reaches idle N2
• C. Always in Normal mode during start
• D. In a sequence set by the copilot

Answer: (B)

The selection of fuel pumps during engine start in the Dassault Falcon 7X is designed to ensure optimal engine performance and reliability. During the initial phase of engine start, the system automatically activates the Standby pump. This is done to provide a reliable source of fuel supply while the engine is in the process of starting, which allows for a smoother ignition and prevents engine stall. Once the engine successfully reaches the idle N2 speed, which indicates it is operating normally, the system then transitions to the Normal pump. This automatic transition to the Normal pump ensures that the engine receives the appropriate fuel flow once it is stable, optimizing engine function and longevity. Automating this process allows for enhanced safety and effectiveness, as it minimizes the potential for human error that could occur if the pilot were to select the pumps manually. The other choices do not accurately describe the engine starting fuel pump selection process. Manual selection by the pilot could result in incorrect fuel pump operation during critical start phases, while operating solely in Normal mode could lead to inadequate fuel supply during start-up. A sequence set by the copilot does not align with the aircraft's automated systems designed for such critical functions.

The selection of fuel pumps during engine start in the Dassault Falcon 7X is designed to ensure optimal engine performance and reliability. During the initial phase of engine start, the system automatically activates the Standby pump. This is done to provide a reliable source of fuel supply while the engine is in the process of starting, which allows for a smoother ignition and prevents engine stall. Once the engine successfully reaches the idle N2 speed, which indicates it is operating normally, the system then transitions to the Normal pump.

This automatic transition to the Normal pump ensures that the engine receives the appropriate fuel flow once it is stable, optimizing engine function and longevity. Automating this process allows for enhanced safety and effectiveness, as it minimizes the potential for human error that could occur if the pilot were to select the pumps manually.

The other choices do not accurately describe the engine starting fuel pump selection process. Manual selection by the pilot could result in incorrect fuel pump operation during critical start phases, while operating solely in Normal mode could lead to inadequate fuel supply during start-up. A sequence set by the copilot does not align with the aircraft's automated systems designed for such critical functions.