With engine start switches in FLT and engine start levers in IDLE, ignition is provided to which igniters?

With engine start switches in FLT and engine start levers in IDLE, ignition is provided to which igniters?

• A. Both igniters in both engines
• B. Left igniter only
• C. Right igniter only
• D. None

Answer: (A)

Ignition reliability comes from having two independent igniters per engine. When the engine start switch is in FLT and the start lever is at IDLE, both igniters on each engine are energized. This redundancy ensures a successful start even if one ignition circuit or spark plug has a fault, reducing the risk of a no-ignition condition as fuel begins to flow and the engine spools. Energizing only one igniter would leave the start vulnerable to a single-point failure, while energizing none would fail the start outright.

Ignition reliability comes from having two independent igniters per engine. When the engine start switch is in FLT and the start lever is at IDLE, both igniters on each engine are energized. This redundancy ensures a successful start even if one ignition circuit or spark plug has a fault, reducing the risk of a no-ignition condition as fuel begins to flow and the engine spools. Energizing only one igniter would leave the start vulnerable to a single-point failure, while energizing none would fail the start outright.