A220 Type - Landing Gear

The parking brake can be applied when the aircraft is not powered using 28 VDC from what source

DC ESS 1, DC ESS 2

How is the alternate gear extension powered

DC ESS 3

Anti-skid protection is available down to what speed

10 knots

What are the computers that control the landing gear and brakes

2 LGCSU, 2 BDCU

The main wheels have fusible plugs to release tire pressure when temperature exceeds 200C. How many fusible plugs per main wheel

3

Auto brake RTO will only work during a rejected take off above what speed

60 knots

Which hydraulic system provides pressure for extension and retraction of the landing gear

HYD 1

When the alternate brake mode is activated, which braking system protections are available

None. BPCUs are bypassed.

Brake wear indication of 3 amber lines indicates what condition

Brakes to be replaced immediately.

When could you expect to see ALTN GEAR DN cyan advisory message without using the alternate gear switch

The next gear extension following each 550 flight hours. (Alternate gear extension dormancy check)

With the nosewheel steering system disengaged, how many degrees can the nosewheel turn

Up to 130 degrees

Below 30 kts, how many degrees is the tiller capable of turning the nose gear

Up to 80 degrees