During Alternate gear extension, what condition is necessary for three green indications on EICAS?

During Alternate gear extension, what condition is necessary for three green indications on EICAS?

• A. Gear handle must be down to get 3 green on EICAS
• B. Gear handle must be up
• C. No action needed
• D. The PSEM must be bypassed

Answer: (A)

The three green indications on EICAS mean every gear is down and locked. In alternate gear extension, that status only appears when the gear is commanded to extend via the gear handle being placed down. The handle position activates the alternate extension path, allowing each gear to move to the down and locked position and thus display green on EICAS. If the handle is not down, the gears aren’t commanded to extend, so you wouldn’t get all three greens. No action or bypassing the PSEM isn’t part of producing that green indication in this situation.

The three green indications on EICAS mean every gear is down and locked. In alternate gear extension, that status only appears when the gear is commanded to extend via the gear handle being placed down. The handle position activates the alternate extension path, allowing each gear to move to the down and locked position and thus display green on EICAS. If the handle is not down, the gears aren’t commanded to extend, so you wouldn’t get all three greens. No action or bypassing the PSEM isn’t part of producing that green indication in this situation.