In the described condition, what does placing the engine start switch in CONT provide?

In the described condition, what does placing the engine start switch in CONT provide?

• A. ignition to the selected igniter and does not open the start valve
• B. ignition to both igniters and opens the start valve
• C. no ignition is provided
• D. start valve opens and fuel is cut off

Answer: (B)

During start you need both fuel and a reliable flame source. Putting the engine start switch in CONT energizes both igniters and opens the start valve, so fuel can reach the combustor while a continuous spark is available. This combination provides a stable light-off and helps prevent flameout as air flows through the engine during start. If only one igniter were energized or the start valve didn’t open, the engine would have a much harder time starting. If ignition is off or fuel is not allowed to flow, there is no start at all.

During start you need both fuel and a reliable flame source. Putting the engine start switch in CONT energizes both igniters and opens the start valve, so fuel can reach the combustor while a continuous spark is available. This combination provides a stable light-off and helps prevent flameout as air flows through the engine during start. If only one igniter were energized or the start valve didn’t open, the engine would have a much harder time starting. If ignition is off or fuel is not allowed to flow, there is no start at all.