Boeing B737NG - Landing gear

If the landing gear cannot be raised after takeoff:

Land at the nearest suitable airfield.

Pull the landing gear lever out to the second detent then raise it to the up position.

Use the override trigger.

When at a safe altitude follow the QRH procedure.

Correct! Wrong!

Which pressure is indicated by the Hydraulic Brake Pressure Indicator?

Normal pressure of 3500 PSI

Normal precharge in the brake accumulator of 1200 PSI.

Normal precharge of 2800 PSI

Maximum pressure of 3500 PSI

Correct! Wrong!

Hydraulic pressure is removed from the landing gear system after 5 minutes with the LANDING GEAR lever in the OFF position.

True.

False.

Correct! Wrong!

There is no countdown. The hydraulic pressure is removed immediately with the LANDING GEAR lever in the OFF position.

The precharge pressure in the brake accumulator is:

1000 psi.

1700 psi.

1500 psi.

Correct! Wrong!

The parking brake is released by depressing the pedals until the PARKING BRAKE lever releases. A fault in the parking brake system may cause the ANTISKID INOP light to illuminate.

False.

True.

Correct! Wrong!

The alternate brake system is powered by:

Accumulator pressure.

System A hydraulics.

System B hydraulics.

Correct! Wrong!

What is the minimum preflight pressure for the brake accumulator?

3000 psi.

3500 psi.

2800 psi.

2500 psi.

Correct! Wrong!

When the manual extension access door is open:

Landing gear retraction is enabled.

Manual landing gear extension is possible with landing gear lever in any position.

Normal landing gear extension is still possible if hydraulic system B pressure is available

Normal landing gear extension is still possible if hydraulic system A pressure is available

Correct! Wrong!

When the NOSE WHEEL STEERING switch is in ALT position:

Hydraulic system A provides power for nose wheel steering.

Standby hydraulic system provides power for nose wheel steering.

Hydraulic system B provides power for nose wheel steering.

The nose wheel steering tiller changes sensitivity for precision parking

Correct! Wrong!

If a landing is made with RTO selected:

AUTO BRAKE DISARM light illuminates 2 seconds after touchdown and no automatic braking action occurs.

AUTO BRAKE DISARM light illuminates 3 seconds after touchdown

Automatic braking action occurs at the RTO level

Automatic braking occurs at the MAX level

Correct! Wrong!

The nose wheel doors go from the open to the close position when the gear is down.

False.

True.

Correct! Wrong!

The nose wheel doors remain open when the gear is down.

Is autobrake available with alternate brakes?

Yes for landing only.

Yes for takeoff and landing.

Yes for takeoff only.

No.

Correct! Wrong!

During taxi before takeoff, the amber AUTO BRAKE DISARM light illuminates. What should you do?

Position ANTISKID select switch to OFF. Use manual brakes in case of RTO.

Position the AUTO BRAKE select switch to OFF. Do not attempt takeoff if light remains illuminated.

AUTO BRAKE system is not mandatory. There is no limitation.

Position the AUTO BRAKE select switch to OFF and then reselect RTO. If light re-illuminates, use manual brakes in case of RTO.

Correct! Wrong!

What happens if you reject a takeoff after reaching 90 knots with the autobrakes in RTO?

AUTO BRAKE DISARM light will illuminate

Automatic speed brake deployment when thrust levers are retarded to idle

Maximum braking when thrust levers are retarded to idle

Automatic braking when reverse thrust selected

Correct! Wrong!

What airspeed must be considered with a wheel well fire situation?

Maintain 235 knots maximum for 20 minutes.

Observe extend limit speed (270 knots and .82M).

Retract landing gear speed of 245 knots maximum.

Observe extend limit speed (280 KIAS and .72M).

Correct! Wrong!

Landing Gear Indicator Lights - What does this indication mean?

Landing gear is not down and locked. Related landing gear is in disagreement with LANDING GEAR lever position (in transit or unsafe).

Landing gear is not down and locked (with thrust levers in idle, and below 800 feet AGL). Related landing gear is in disagreement with LANDING GEAR lever.

Landing gear is not down and locked (with either or both forward thrust levers retarded to idle, and below 1000 feet AGL). Related landing gear is in disagreement with LANDING GEAR lever position.

Landing gear is not down and locked (with either or both forward thrust levers retarded to idle, and below 800 feet AGL). Related landing gear is in disagreement with LANDING GEAR lever position (in transit or unsafe).

Correct! Wrong!

While the landing gear is being extended manually, the landing gear lever must be selected to:

DOWN and remain DOWN after extension.

OFF and then selected to DOWN after extension.

OFF and remain OFF after extension.

Correct! Wrong!

The accumulator isolation valve is closed by:

System A pressure whenever system B pressure is lost.

System B pressure whenever system A pressure is lost.

Brake accumulator pressure whenever system B is lost.

Correct! Wrong!

If a main landing gear tire is damaged during takeoff, it is possible that braking of the main gear wheels during retraction may be affected. A spinning tire with a loose tread must be stopped prior to entering the wheel well or it can cause damage to wheel well components. When a spinning tire with loose tread impacts a fitting in the wheel well ring opening, that gear stops retracting and free falls back to the down position.

True.

False.

Correct! Wrong!

The landing gear indicator lights found on the center panel will illuminate red when:

All landing gear are UP and the gear handle is in OFF position

There are no red lights.

All landing gear are DN and the gear handle is in OFF position

One of the 6 green lights is inoperative..

Correct! Wrong!

Which statement is true?

Rudder pedal steering allows 37 degrees of steering in either direction.

Hydraulic system B pressure is bypassed with the lock out pin installed in the steering depressurization valve.

Rudder pedal steering overrides the steering wheel inputs.

Rudder pedal steering is deactivated as the nose gear strut extends.

Correct! Wrong!

After landing, autobrake application begins when both forward thrust levers are retarded to IDLE and Nose wheel and main wheels spin up.

False.

True.

Correct! Wrong!

The Nose wheel has no input.

The alternate anti-skid system has:

Two anti-skid valves.

One alternate brake metering valve connected to all alternate antiskid valves.

Four anti-skid valves.

Correct! Wrong!

The alternate brake source selector valve:

Prevents hydraulic system A from powering the alternate brake system when hydraulic system B is operating normally.

Prevents hydraulic system B from powering the alternate brake system when hydraulic system A is operating normally.

Isolates accumulator pressure.

Correct! Wrong!

The parking brake can be set with only B hydraulic system pressurized.

True

False

Correct! Wrong!

The parking brake can be set with either A or B hydraulic systems pressurized. If A and B hydraulic systems are not pressurized, parking brake pressure is maintained by the brake accumulator. Accumulator pressure is shown on the HYD BRAKE PRESS indicator.

What could cause the amber ANTISKID INOP light to illuminate?

A system fault has been detected by the antiskid monitoring system.

Brake accumulator pressure is in the red band.

AUTO BRAKE select switch OFF.

System B pressure is low.

Correct! Wrong!

Positioning the landing gear control lever to down makes system A hydraulic pressure available to the steering metering valve. Alternate nose wheel steering can be activated to provide system B pressure to the nose wheels when the NOSE WHEEL STEERING switch is placed to ALT, normal quantity is in the system B reservoir, and the airplane is on the ground.

True.

False.

Correct! Wrong!

Which of the following is not part of the braking system?

Nose wheel brakes

Antiskid protection.

Parking brake.

Brake accumulator.

Correct! Wrong!

If a landing is made with RTO selected:

Automatic braking action occurs at the RTO level

Automatic braking occurs at the MAX level

AUTO BRAKE DISARM light illuminates 3 seconds after touchdown

AUTO BRAKE DISARM light illuminates 2 seconds after touchdown and no automatic braking action occurs.

Correct! Wrong!

The brake pressure accumulator also provides pressure to maintain the parking brake when hydraulic system A and B are depressurized.

False.

True.

Correct! Wrong!

The air-ground system receives air-ground logic signals from:

The cabin pressure controller

The altimeter

The FMC position updating from the GPS

Six sensors, two on each landing gear

Correct! Wrong!

In flight and ground operation of various airplane systems are controlled by the air/ground system. These signals are used to configure the airplane systems to the appropriate air or ground status.

With RTO selected, if the takeoff is rejected prior to wheel speed reaching _____ autobraking is not initiated, the AUTO BRAKE DISARM light does not illuminate and the RTO autobrake function remains armed.

80 knots

90 knots

60 knots

72 knots

Correct! Wrong!

If the takeoff is rejected after reaching a wheel speed of 90 knots, maximum braking is applied automatically when the forward thrust levers are retarded to IDLE.

The autobrake system performs a self-test at initial AC power application. If the self test is not successful, the AUTO BRAKE DISARM light illuminates and the system does not work.

True.

False.

Correct! Wrong!

What system normally provides hydraulic pressure for Nose Wheel Steering?

System A

System B

Nose wheel steering accumulator

Standby system

Correct! Wrong!

The brake accumulator is pressurized by hydraulic system A. If both normal and alternate brake system pressure is lost, trapped hydraulic pressure in the brake accumulator can still provide several braking applications or parking brake application.

True.

False.

Correct! Wrong!

The brake accumulator is pressurized by hydraulic system B.

Landing autobrake settings may be selected after touchdown prior to decelerating through _____. Braking initiates immediately if both forward thrust levers are retarded to IDLE and the main wheels spin–up.

30 kts of ground speed.

40 knots IAS.

40 kts of ground speed.

30 knots.

Correct! Wrong!

Antiskid protection is available even with loss of both hydraulic systems.

False.

True.

Correct! Wrong!

Antiskid system protection is provided during autobrake operation.

The HYD Brake Pressure indicator reads zero, but both hydraulic system pressures are normal.

The nitrogen precharge in the brake accumulator has leaked out, accumulator braking is not available but normal braking is unaffected.

The nitrogen precharge in the brake accumulator has leaked out, normal braking is not available but alternate braking is unaffected.

The nitrogen precharge in the brake accumulator has leaked out and alternate brakes will not be available in the event of system B failure.

Correct! Wrong!

What is the maximum Operating airspeed with the gear extended?

270 kt and .80M.

235 kt and .80M.

235 kt and .78M.

270 kt and .82M.

Correct! Wrong!

With Flap 25 selected and the gear not down and locked, both Forward Thrust Levers are retarded to below approximately 10 degrees thrust lever angle. The gear warning horn sounds and:

Cannot be cancelled by the Landing Gear Horn Cut-Out switch or by any position of the thrust levers.

Can be cancelled by the Landing Gear Horn Cut-Out switch.

Can be cancelled by moving one of the Thrust levers forward to approximately the 30 degrees thrust lever angle.

Correct! Wrong!

Hydraulic system pressure from System B will be used to retract the landing gear:

When the ALTERNATE NOSE WHEEL switch is positioned ON.

When System A pressure is low and the landing lever is positioned UP.

After failure of the No.1 engine with the landing gear still down and the landing gear lever is positioned up.

After a failure of the No.1 engine hydraulic pump with the landing gear still down and the landing gear lever is positioned UP.

Correct! Wrong!

During landing gear retraction:

A fitting in the wheel well opening applies a braking force to the wheels.

The pilot applies manual brakes to stop main gear rotation.

Snubbers in the wheel bays stop the rotation of all wheels.

The brakes automatically stop rotation of the main gear wheels.

Correct! Wrong!

Hydraulic pressure from System B will be used to raise the landing gear:

After a failure of the No.1 engine hydraulic pump with the landing gear still down and the landing gear is positioned up.

When the No.1 engine RPM drops below a limit value with the landing gear still down and the landing gear is positioned up.

When System A pressure is low and the landing lever is positioned up.

When the ALTERNATE NOSE WHEEL Switch is positioned ON.

Correct! Wrong!

During alternate brake system operation, the following protection is provided:

Skid and hydroplane only.

Skid, locked wheel, touchdown and hydroplane.

Skid and locked wheel.

Skid, locked wheel and hydroplane only.

Correct! Wrong!

Both normal and alternate brake systems provide skid, locked wheel, touchdown and hydroplane protection.

What is the maximum airspeed to retract the gear?

250 kt.

270 kt.

235 kt.

210 kt.

Correct! Wrong!

If the thrust levers are advanced after touchdown:

The AUTO BRAKE select switch will move to OFF.

The AUTO BRAKE DISARM light will illuminate immediately.

The AUTO BRAKE DISARM light will illuminate after 3 seconds.

The AUTO BRAKE DISARM light will not illuminate.

Correct! Wrong!

Hydraulic pressure is removed from the landing gear system with the LANDING GEAR lever in the UP position.

False

True.

Correct! Wrong!

The hydraulic pressure is removed with the LANDING GEAR lever in the OFF position!

Landing autobrake settings may be selected after touchdown:

Prior to decelerating through 30 kts of ground speed.

However, autobrake action will occur only when both thrust levers are retarded to reverse thrust range

However, the AUTO BRAKE DISARM light will illuminate and autobrake application will not occur

Prior to decelerating through through 60 knots groundspeed

Correct! Wrong!

Fittings located in the opening of each main gear well:

Are intended to provide protection to wheel well components during gear retraction by preventing a gear with a spinning tire and loose tread from entering the wheel well

Allows the landing gear transfer unit to use hydraulic system B pressure to raise the gear if hydraulic system A fails.

Provide positive unlock during main gear retraction

Are intended to provide automatic braking to main gear wheels during retraction

Correct! Wrong!

What is the steering authority for the rudder pedals?

+ or - 13 degrees

+ or - 5 degrees

+ or - 7 degrees

+ or - 20 degrees

Correct! Wrong!

If the nose gear lockout pin is not installed

Pushback must be with System A Elec. pump OFF.

Pushback must be with both System A hydraulic pumps OFF.

Pushback must be with both System A hydraulic pumps ON.

Correct! Wrong!

Boeing 737NG – Landing Gear

Quiz

Boeing B737NG - Landing gear

If the landing gear cannot be raised after takeoff:

Which pressure is indicated by the Hydraulic Brake Pressure Indicator?

Hydraulic pressure is removed from the landing gear system after 5 minutes with the LANDING GEAR lever in the OFF position.

The precharge pressure in the brake accumulator is:

The parking brake is released by depressing the pedals until the PARKING BRAKE lever releases. A fault in the parking brake system may cause the ANTISKID INOP light to illuminate.

The alternate brake system is powered by:

What is the minimum preflight pressure for the brake accumulator?

When the manual extension access door is open:

When the NOSE WHEEL STEERING switch is in ALT position:

If a landing is made with RTO selected:

The nose wheel doors go from the open to the close position when the gear is down.

Is autobrake available with alternate brakes?

During taxi before takeoff, the amber AUTO BRAKE DISARM light illuminates. What should you do?

What happens if you reject a takeoff after reaching 90 knots with the autobrakes in RTO?

What airspeed must be considered with a wheel well fire situation?

Landing Gear Indicator Lights - What does this indication mean?

While the landing gear is being extended manually, the landing gear lever must be selected to:

The accumulator isolation valve is closed by:

The landing gear indicator lights found on the center panel will illuminate red when:

Which statement is true?

After landing, autobrake application begins when both forward thrust levers are retarded to IDLE and Nose wheel and main wheels spin up.

The alternate anti-skid system has:

The alternate brake source selector valve:

The parking brake can be set with only B hydraulic system pressurized.

What could cause the amber ANTISKID INOP light to illuminate?

Which of the following is not part of the braking system?

If a landing is made with RTO selected:

The brake pressure accumulator also provides pressure to maintain the parking brake when hydraulic system A and B are depressurized.

The air-ground system receives air-ground logic signals from:

With RTO selected, if the takeoff is rejected prior to wheel speed reaching _____ autobraking is not initiated, the AUTO BRAKE DISARM light does not illuminate and the RTO autobrake function remains armed.

The autobrake system performs a self-test at initial AC power application. If the self test is not successful, the AUTO BRAKE DISARM light illuminates and the system does not work.

What system normally provides hydraulic pressure for Nose Wheel Steering?

The brake accumulator is pressurized by hydraulic system A. If both normal and alternate brake system pressure is lost, trapped hydraulic pressure in the brake accumulator can still provide several braking applications or parking brake application.

Landing autobrake settings may be selected after touchdown prior to decelerating through _____. Braking initiates immediately if both forward thrust levers are retarded to IDLE and the main wheels spin–up.

Antiskid protection is available even with loss of both hydraulic systems.

The HYD Brake Pressure indicator reads zero, but both hydraulic system pressures are normal.

What is the maximum Operating airspeed with the gear extended?

With Flap 25 selected and the gear not down and locked, both Forward Thrust Levers are retarded to below approximately 10 degrees thrust lever angle. The gear warning horn sounds and:

Hydraulic system pressure from System B will be used to retract the landing gear:

During landing gear retraction:

Hydraulic pressure from System B will be used to raise the landing gear:

During alternate brake system operation, the following protection is provided:

What is the maximum airspeed to retract the gear?

If the thrust levers are advanced after touchdown:

Hydraulic pressure is removed from the landing gear system with the LANDING GEAR lever in the UP position.

Landing autobrake settings may be selected after touchdown:

Fittings located in the opening of each main gear well:

What is the steering authority for the rudder pedals?

If the nose gear lockout pin is not installed