Boeing B787 - Landing gear

The brake system is powered by _____ electric brake power supply units. The brake pedals provide independent control of the left and right brakes.

Eight.

Four.

Six.

Correct! Wrong!

Four Electric Brake Actuators (EBAs) are provided on each main landing gear wheel brake to control the application of braking force to the carbon disc.

The EICAS advisory message TIRE PRESS is displayed if any tire pressure is above or below normal range, or there is an excessive pressure difference between two tires:

On the same side.

On the same axle.

On the same gear.

Correct! Wrong!

Selecting RTO (rejected takeoff) prior to takeoff arms the autobrake system. Maximum braking is obtained in this mode. If an RTO is initiated at or below_____, the RTO autobrake function does not operate.

75 knots.

100 knots.

85 knots.

Correct! Wrong!

If _____ after the normal transit time, the EICAS caution message GEAR DISAGREE is displayed.

Any gear is inoperative.

Any gear is not up and locked up.

Any gear is not up.

Correct! Wrong!

Semi Levered Gear (SLG) for B787-10. To increase the angle of attack during takeoff the SLG Actuator is installed. The SLG actuator locks the main gear in place and this shifts the main gear rotation point to the aft wheels instead of the middle of the gear. The SLG actuator also positions the gear for retraction and landing. On landing the SLG actuator isn't locked.

NextGenerationMechanic

True

False.

Correct! Wrong!

The EICAS advisory message GEAR DOOR is displayed if any hydraulically actuated door is not closed after normal transit time.

True.

False.

Correct! Wrong!

The Boeing 787 is equipped with a retractable landing gear that is:

Hydraulically operated.

Electrically and hydraulically operated.

Electrically operated.

Correct! Wrong!

When landing gear retraction is completed, the landing gear is held in place by:

NextGenerationMechanic

Automatic safety switches.

Hydraulic actuators.

Uplocks.

Correct! Wrong!

Should a failure occur in the landing gear control system:

The landing gear can still be extended by activating a guarded Alternate Gear (ALTN GEAR) switch.

The landing gear can still be extended by pressing the DN LCK REL switch.

The landing gear can still be extended by pressing the gear override switch.

Correct! Wrong!

Primary steering control is provided by a nosewheel steering tiller for each pilot. Limited steering control is available through the rudder pedals. The tillers can turn the nosewheels up to _____ in either direction.

70 degrees.

60 degrees.

80 degrees.

Correct! Wrong!

In–flight and ground operation of various airplane systems are controlled by the air/ground sensing system. The system receives air/ground logic signals from sensors located on the left main landing gear beam. These signals are used to configure the airplane systems to the appropriate air or ground status.

False.

True.

Correct! Wrong!

The system receives air/ground logic signals from sensors located on EACH main landing gear beam. These signals are used to configure the airplane systems to the appropriate air or ground status.

After retraction, the EICAS landing gear position indication changes to UP for _____ and then blanks.

10 seconds.

5 seconds.

20 seconds.

Correct! Wrong!

During taxi and at each manual brake application, if wheel speeds are less than_____, the brake control system applies one-half of the brakes on each main landing gear.

30 knots.

20 knots.

40 knots.

Correct! Wrong!

What does this indicate?

Indicates respective gear door is closed.

Indicates respective gear door is closed and locked.

Indicates respective gear door is closed. Nose gear doors indicate closed when the gear is down.

Correct! Wrong!

What does this indicate?

Indicates respective gear door sensor reads invalid.

Indicates respective gear door is in-transit.

Indicates respective gear door is closed.

Correct! Wrong!

With the landing gear retracted and all doors closed, the landing gear hydraulic system:

Is automatically depressurized.

Stays pressurized for 10 seconds.

Stays pressurized in case of immediate actuation.

Correct! Wrong!

What does this indicate?

Indicates loss of brake function and antiskid fault.

Indicates loss of brake function on the associated wheel.

Indicates loss of brake function or brake deactivation on the associated wheel.

Correct! Wrong!

The autobrake system provides automatic braking at preselected deceleration rates for landing and for rejected takeoff.

False.

True.

Correct! Wrong!

The autobrake system provides automatic braking at preselected deceleration rates for landing and FULL PRESSURE for rejected takeoff.

What hydraulic system powers the landing gear?

Left hydraulic system.

Right hydraulic system

Center Hydraulic system.

Correct! Wrong!

Wheel brake temperatures are displayed on the GEAR synoptic display. Normal range values of 0 to 4.9 are white. For values of 3.0 to 4.9, the brake symbol for the hottest brake on each main gear truck becomes amber.

False.

True.

Correct! Wrong!

For values of 3.0 to 4.9, the brake symbol for the hottest brake on each main gear truck becomes solid white.

What does this indicate?

Indicates respective door is closed with an invalid gear door sensor.

Indicates respective gear door sensor reads invalid.

Indicates respective gear door is in-transit.

Correct! Wrong!

The alternate landing gear extension system uses a dedicated AC powered electric hydraulic pump and center hydraulic system fluid to extend the landing gear.

False.

True.

Correct! Wrong!

The alternate landing gear extension system uses a dedicated DC powered electric hydraulic pump and center hydraulic system fluid to extend the landing gear.

The brake temperature value _____ when invalid brake temperature data or faults are detected in the brake temperature system.

Blanks.

Is dashed white.

Is dashed.

Correct! Wrong!

On the ground, the landing gear lever is held in the DN position by an automatic lever lock. The lever lock can be manually overridden by pushing and holding the landing gear lever LOCK OVERRIDE switch. In flight, the lever lock is automatically released through air-ground sensing.

True.

False.

Correct! Wrong!

Touchdown and hydroplaning protection is provided using airplane inertial groundspeed. Locked wheel protection is provided using a comparison with other wheel speeds.

True.

False.

Correct! Wrong!

The rudder pedals can be used to turn the nosewheels up to _____ in either direction. Tiller inputs are summed with rudder pedal inputs.

8 degrees.

15 degrees.

10 degrees.

Correct! Wrong!

On ground, the EICAS advisory message AUTOBRAKE is displayed if the autobrake system is:

Armed.

Disarmed or inoperative, the AUTOBRAKE selector is OFF but the system is armed, or an RTO is initiated above 85 knots but autobraking has not been applied.

Disarmed or an RTO is initiated above 85 knots but autobraking has not been applied

Correct! Wrong!

Truck Tilt Actuator for B787-8 and -9. The tilt actuator positions the gear for landing (forward wheels up) and for main gear retraction (forward wheels down). This means that when the gear is retracted the gear fits inside the main gear compartment.

NextGenerationMechanic

False.

True.

Correct! Wrong!

Autobrake on landing - If MAX AUTO is selected, deceleration is limited to the AUTOBRAKE 4 level until pitch angle is less than_____, then deceleration is increased to the MAX AUTO level.

Five degrees.

Seven degrees.

One degree.

Correct! Wrong!

When the landing gear lever is placed in the UP position the gear retraction sequence is started. The EICAS landing gear position indication display changes from a green DOWN indication to _____ in-transit indication as the landing gear retract into the wheel wells.

An amber cross

An amber chevron.

A white crosshatch.

Correct! Wrong!

An EICAS advisory message, BRAKE TEMP, displays when any brake registers _____ on the gear synoptic display.

5.4 or higher.

5.2 or higher.

5.0 or higher.

Correct! Wrong!

An EICAS advisory message, BRAKE TEMP, displays when any brake registers 5.0 or higher on the gear synoptic display until all brake temperatures are below 3.0.

Tire pressures are displayed inside each individual gear symbol on the GEAR synoptic. Normal values are depicted in white. Above or below normal range values are depicted in amber.

False.

True.

Correct! Wrong!

The RTO autobrake setting commands maximum braking pressure if:

The airplane is on the ground, and the groundspeed is below 85 knots, both thrust levers are retarded to idle or at least one reverser is activated.

The airplane is on the ground, and the groundspeed is above 85 knots, both thrust levers are retarded to idle or at least one reverser is activated.

The airplane is on the ground, and the groundspeed is above 85 knots, and both thrust levers are retarded to idle.

Correct! Wrong!

When the autobrake system disarms during takeoff, the AUTOBRAKE selector remains in the RTO position, but automatically moves to OFF after takeoff.

False.

True.

Correct! Wrong!

Boeing 787 – Landing gear

Quiz

Boeing B787 - Landing gear

The brake system is powered by _____ electric brake power supply units. The brake pedals provide independent control of the left and right brakes.

The EICAS advisory message TIRE PRESS is displayed if any tire pressure is above or below normal range, or there is an excessive pressure difference between two tires:

Selecting RTO (rejected takeoff) prior to takeoff arms the autobrake system. Maximum braking is obtained in this mode. If an RTO is initiated at or below_____, the RTO autobrake function does not operate.

If _____ after the normal transit time, the EICAS caution message GEAR DISAGREE is displayed.

The EICAS advisory message GEAR DOOR is displayed if any hydraulically actuated door is not closed after normal transit time.

The Boeing 787 is equipped with a retractable landing gear that is:

When landing gear retraction is completed, the landing gear is held in place by:

Should a failure occur in the landing gear control system:

Primary steering control is provided by a nosewheel steering tiller for each pilot. Limited steering control is available through the rudder pedals. The tillers can turn the nosewheels up to _____ in either direction.

After retraction, the EICAS landing gear position indication changes to UP for _____ and then blanks.

During taxi and at each manual brake application, if wheel speeds are less than_____, the brake control system applies one-half of the brakes on each main landing gear.

What does this indicate?

What does this indicate?

With the landing gear retracted and all doors closed, the landing gear hydraulic system:

What does this indicate?

The autobrake system provides automatic braking at preselected deceleration rates for landing and for rejected takeoff.

What hydraulic system powers the landing gear?

Wheel brake temperatures are displayed on the GEAR synoptic display. Normal range values of 0 to 4.9 are white. For values of 3.0 to 4.9, the brake symbol for the hottest brake on each main gear truck becomes amber.

What does this indicate?

The alternate landing gear extension system uses a dedicated AC powered electric hydraulic pump and center hydraulic system fluid to extend the landing gear.

The brake temperature value _____ when invalid brake temperature data or faults are detected in the brake temperature system.

On the ground, the landing gear lever is held in the DN position by an automatic lever lock. The lever lock can be manually overridden by pushing and holding the landing gear lever LOCK OVERRIDE switch. In flight, the lever lock is automatically released through air-ground sensing.

Touchdown and hydroplaning protection is provided using airplane inertial groundspeed. Locked wheel protection is provided using a comparison with other wheel speeds.

The rudder pedals can be used to turn the nosewheels up to _____ in either direction. Tiller inputs are summed with rudder pedal inputs.

On ground, the EICAS advisory message AUTOBRAKE is displayed if the autobrake system is:

Truck Tilt Actuator for B787-8 and -9. The tilt actuator positions the gear for landing (forward wheels up) and for main gear retraction (forward wheels down). This means that when the gear is retracted the gear fits inside the main gear compartment.

Autobrake on landing - If MAX AUTO is selected, deceleration is limited to the AUTOBRAKE 4 level until pitch angle is less than_____, then deceleration is increased to the MAX AUTO level.

When the landing gear lever is placed in the UP position the gear retraction sequence is started. The EICAS landing gear position indication display changes from a green DOWN indication to _____ in-transit indication as the landing gear retract into the wheel wells.

An EICAS advisory message, BRAKE TEMP, displays when any brake registers _____ on the gear synoptic display.

Tire pressures are displayed inside each individual gear symbol on the GEAR synoptic. Normal values are depicted in white. Above or below normal range values are depicted in amber.

The RTO autobrake setting commands maximum braking pressure if:

When the autobrake system disarms during takeoff, the AUTOBRAKE selector remains in the RTO position, but automatically moves to OFF after takeoff.