How many indicators are on the A220 door?

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Multiple Choice

How many indicators are on the A220 door?

Two indicators are used on the A220 door to communicate two distinct pieces of critical status at a glance. One indicator shows the door’s basic position—whether it is latched/closed—so crew can confirm the door is secured. The other indicator shows the slide arming status—whether the emergency slide is armed or disarmed—so the slide readiness is clearly communicated. Having separate indicators for these two conditions allows quick, unambiguous checks from either side of the door, which is essential for safety during pre-flight checks and in emergencies. A single indicator wouldn’t reliably convey both pieces of information, and more than two would add unnecessary complexity.

Two indicators are used on the A220 door to communicate two distinct pieces of critical status at a glance. One indicator shows the door’s basic position—whether it is latched/closed—so crew can confirm the door is secured. The other indicator shows the slide arming status—whether the emergency slide is armed or disarmed—so the slide readiness is clearly communicated. Having separate indicators for these two conditions allows quick, unambiguous checks from either side of the door, which is essential for safety during pre-flight checks and in emergencies. A single indicator wouldn’t reliably convey both pieces of information, and more than two would add unnecessary complexity.

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