Landing Gear

Question 1

In which direction does the gear retract

Answer 1

The Landing Gear (LG) consists of two inward retracting ​main ​ gears ​ and ​ a ​ forward​ ​ retracting ​ nose ​ gear

Question 2

Which hydraulic system supplies landing gear operation

Answer 2

Hydraulic system 1

Question 3

How is landing gear locked down

Answer 3

The​ ​ main ​ gears ​ are ​ mechanically ​locked down.

Question 4

Are there any landing gear up locks

Answer 4

No

Question 5

How is the landing gear held in the retracted position

Answer 5

The main gears are​ held in ​the retracted position by hydraulic pressure.

Question 6

What happens to a retracted landing gear when the hydraulic power is lost

Answer 6

The main gears are​ held in ​the retracted position by hydraulic pressure. In the event​ ​of loss of hydraulic pressure, the main gears will rest on ​the ​ doors. ​ Outboard ​ doors ​ are ​ connected ​ to ​ the ​ main​ ​gear ​ struts, ​ and​ ​ open​ ​ and​ ​ close ​ mechanically

Question 7

Which doors are hydraulically operated

Answer 7

All

Question 8

What is the landing gear lever connected to

Answer 8

The​ ​ LG ​ selector ​ operates ​ a​ ​ selector​ ​valve ​ which ​ directs ​ hydraulic ​ system ​ 1 ​ pressure​ ​ in ​accordance ​ with ​ UP ​ and ​ DOWN ​ selection

Question 9

What are normal extension and retraction times

Answer 9

Extension time 26secs

Retraction time 9 secs

Question 10

Can the landing gear selector be selected up on the ground

Answer 10

Inadvertent UP selection on the ground is ​prevented ​ by ​ an ​ electrical ​ LG ​ selector ​ lock

Question 11

What light indications confirm normal operation

Answer 11

LG position lights are located below the LG selector. The ​LG down and locked position is indicated by a green light ​for each respective gear. The lights will be out when the LG ​is fully retracted. A blue light​ incorporated​ in the​ LG selector ​knob will come ​ on during​ retraction until all LG doors are ​closed ​ and ​ locked, ​ and ​ during ​ extension ​ until ​ all ​ landing ​gears are down and locked. When the lights come on due​ ​to alternate LG extension it remains on until the LG selector ​is selected down

Question 12

What will give a level 3 LANDING GEAR NOT DOWN alert can the alert be cancelled

Answer 12

A level 3 alerts is presented when the LG is not down and ​locked and the​ aircraft is in an​ approach configuration. The​ ​approach ​ configuration ​ is ​ defined ​ as ​ a ​ radio ​ altitude ​ less ​than ​ 1000 ​ ft ​ and ​ either ​ a ​ flap ​ position ​ greater​ ​ than ​ 23​ ​degrees or a thrust lever position less than MIN TO

Question 13

When would you use the LG OVRD button

Answer 13

In​ case​ essential/emergency​ power​ is​ selected​ ON,​ the​ LG​ ​OVRD​ button must​ be​ depressed​ in​ case of​ gear​ retraction,​ as​ the​ anti-​ ​retraction​ solenoid​ is​ powered​ by​ the dual​ DC​ bus.​ To​ eliminate​ the ​possibility​ of​ structural​ damage​ when​ one​ (or​ both)​ main​ landing​ gear​ ​strut(s)​ has (have)​ failed​ to​ extend,​ the​ use​ of​ the landing​ gear​ selector​ ​override​ button​ should​ be​ delayed​ until​ passing​ 400​ ft​ AGL

Question 14

What restriction is there on the operation of the LG OVRD button

Answer 14

To​ eliminate​ the ​possibility​ of​ structural​ damage​ when​ one​ (or​ both)​ main​ landing​ gear​ ​strut(s)​ has (have)​ failed​ to​ extend,​ the​ use​ of​ the landing​ gear​ selector​ ​override​ button​ should​ be​ delayed​ until​ passing​ 400​ ft​ AGL

Question 15

What does operation of the alternate landing gear lever do

Answer 15

Operation of​ ​ the selector​ ​ releases the​ ​locks​ ​of​ ​the​ ​ LG​ ​doors​,​​ and​ ​ dumps​ ​ the​ ​ LG​ ​hydraulic​ ​system​ ​ pressure. ​ The ​ LG​ ​ will​ then​ ​ extend​ ​by​ ​gravity​ ​ ​ ​ and m​ e​ c​ h​ a​ n​ i​ c​ a​ l​ l​ y​​ lock​​ d​ o​ w​ n​

Question 16

What happens to the main gear doors after an alternate selection

Answer 16

The ​main-gear i​ n​ board​ ​ doors​ will​ ​ stay​ ​ open​ ​and​​ ​are ​protected, ​against ​ serious​ ​ damage​ ​on ​landing, ​by​ ​ slide​ ​ strips

Question 17

Nose wheel steering is powered by which hydraulic system

Answer 17

Hydraulic system 1

Question 18

Is nose wheel steering available after an alternate extension

Answer 18

Nose-wheel​ steering​ ​becomes ​ inoperative​ ​after ​ alternate ​ gear​​ ​extensio​n​.

Question 19

What steering angles are available from rudder input and tiller input

Answer 19

Rudder input 7 degrees either side of centre

Tiller input 76 degrees either side of centre

Question 20

Where and when is nose wheel steering switched on and off

Answer 20

A towing​ switch,​ located next​ to the external power​ receptacle,​ can​ be used to​ depressurize the​ ​nosewheel steering system​ during maintenance round handling.​

Question 21

What happens if steering inputs exceed the normal limits

Answer 21

It castor till it is back to its normal range

Question 22

What happens to the steering if the landing gear is selected down

Answer 22

Upon landing-gear-down selection, the​ steering​ system​ will​ be depressurized to prevent​ ​inadvertent​ steering​ angles​ while using​ the​ rudder pedals

Question 23

What hydraulic system provides which brakes

Answer 23

Normal brakes hydraulic system 2

Alternate brakes hydraulic system 1

Question 24

What happens if the system supplying the normal brakes looses pressure

Answer 24

​ Automatic​ ​ change-over ​to alternate brake operation occurs when​ the ​pressure of hydraulic​ system 2 drops below a​ ​preset ​ value

Question 25

What is the minimum accumulator pressure for the alternate system

Answer 25

1000 psi

Question 26

What is the diff between normal and alternate braking

Answer 26

Normal ​ brake ​ operation ​ provides ​ for​ ​ skid​ ​protection ​ on ​ all ​ four ​ wheels ​ individually.

Alternate ​ brake ​ operation ​ pro- ​vides for skid​ protection on paired wheels​ on ​either ​ side.

Question 27

How do you test the anti skid

Answer 27

Press the anti skid test pb

Question 28

What alert is there for anti skid

Answer 28

Anti skid fault

Level 2

Question 29

What does operation of the parking brake handle do

Answer 29

The parking brake ​can ​ be ​ engaged ​ by ​ depressing ​ either ​ set ​ of​ ​brake ​ pedals ​ and ​ pulling​ ​ the ​ parking​ ​ brake​ ​handle. ​

Question 30

What visual indications do you have that the parking brake is set

Answer 30

A ​memo message is​ presented​ by ​MFDS whenever the parking brake is set