B777 - Part 8

The reservoir requires refilling. The RF is inhibited in flight.

Hydraulic reservoir pressurization.

Flight control system components are distributed so that any one hydraulic system can provide adequate airplane controllability.

The demand pumps provide a backup power source for the air-driven primary pumps.

Reserve brakes are isolated from the center system and remain operable.

It is reconnected to the center hydraulic system when the system determines that both engines have been running for more than 30 seconds.

They are electric-motor driven.

Both engines are failed.

The landing gear free falls to the down and locked position.

They control only nose wheel steering and the rudder.

When the nose wheel steering angle exceeds 13 degrees.

Loss of the Right and Center/Reserve hydraulic systems.

The EICAS memo message PARKING BRAKE SET is displayed.

It is not set.

OFF

AUTOBRAKE MAX

If the normal system is operating, select DN then UP

DISARM

Main gear steering is unlocked when commanded to the center position.

On the ground, with wheel speed above 85 knots and both thrust levers retarded to idle.

A brace on the left main gear is unlocked.

When the thrust levers are retarded to idle above 85 knots.

The landing gear handle must be in the DOWN position before the alternate gear lowering system operates.

Nose wheel and aft axle steering are powered by the center/reserve hydraulic system.

Pushing a brake pedal sends hydraulic pressure through the normal antiskid valves to the brakes.

The EICAS message ANTISKID is displayed if the parking brake valve is not fully open with the parking brake released.

Air/ground sensing logic signals come from the nose

The parking brake pressure can be maintained by the brake accumulator.

0.82 Mach or minimum maneuver speed plus 15 knots, whichever is lower.

38 knots

9.1 psi

49 degrees Celsius

Contaminated runways

There are no operating limitations on speedbrake operation.

Crosswind 25 kts

20,000 feet

25 knots

75 feet

200 feet

43,100 feet

200 feel AGL

Automatic landings can be made using flaps 20 or 30, with both engines operative or one engine inoperative.

239 feet 9 inches (73.1 meters)

160.2 feet (48.8 meters)

15 feet (4.6 meters) of the wingtip or 40 feet (12.2 meters) of the nose

182 feet (55.4 meters)

8,400 feet

Before the airplane descends more than 50 feet below the MDA unless it is coupled to an ILS glideslope and localizer or in the go-around mode.

200 feet AGL