Safety Features

Question 1

built-in to stop the gear being retracted when it’s not safe to do so and to warn the crew if they are attempting to land with the gear not extended

Answer 1

safety features

Question 2

To avoid damage to the airframe structure, the nosewheel must always be aligned in the _____ and _____ direction prior to retraction.

Answer 2

fore, aft

Question 3

A number of methods are used to ensure that alignment of fore and aft direction are done prior retraction automatically. These are hydraulic nose wheel centering on aircraft with ________ and ________.

Answer 3

power steering, self centering cam system

Question 4

To prevent inadvertent retraction of the landing gear when it’s not safe to do so, a safety device is incorporated which prevents the landing gear selector lever being selected __. This safety device consists of a __________ which retains the selector in the down position and is released by the operation of an ________________.

Answer 4

up, mechanical lock, electrically operated solenoid

Question 5

On smaller aircraft, electrical power to the solenoid is controlled by switches mounted on the ______________.

Answer 5

main gear shock absorber struts

Question 6

When the struts are compressed, the switches are _____ but as the struts extend after takeoff the switch contacts _____.

Answer 6

open, close

Question 7

The electrical supply to the solenoid is completed thus releasing the selector lever lock and allowing the landing gear to be selected ____.

Answer 7

up

Question 8

On larger aircrafts, the _______ may have to be tilted to the correct angle for the lever lock to be released.

Answer 8

main gear trucks

Question 9

On larger aircrafts with body gear steering, the gear will have to be _________ for the lever lock to be released.

Answer 9

aligned fore an aft

Question 10

A means of overriding the lock such as by mechanical means is provided for use in the event of ________ and for maintenance purposes.

Answer 10

solenoid failure

Question 11

Flight crews should exercise great care in using __________.

Answer 11

bypass facility

Question 12

Normally, a bypass facility should only be used when called for in a checklist as raising the gear hydraulically when parts of it are incorrectly positioned can cause catastrophic damage to both the ______ and the ________.

Answer 12

gear, airframe

Question 13

These are intended to prevent inadvertent retraction of the gear when the aircraft is on the ground.

Answer 13

landing gear ground locks or locking pins

Question 14

Landing gear ground locks or locking pins are usually consisted of these which interfere with the operation of the gear in such a way that it is impossible for the gear to move when they are in position.

Answer 14

pins or metal sleeves

Question 15

Landing gear ground locks or locking pins consist of pins or metal sleeves are fitted with ______ which help prevent crew from inadvertently getting airborne with them still in position on the gear.

Answer 15

warning flags

Question 16

It is incorporated in the system to guard against landing with the landing gear not locked down.

Answer 16

aural warning

Question 17

It is often provided to allow certain flight exercises to be carried out without unnecessary warnings.

Answer 17

aural warning isolation switch

Question 18

Different aircraft types use different criteria for the operation of the aural warning and isolation switch which normally involve a combination of ______ and ________ positions.

Answer 18

flap, throttle

Question 19

What does EGPWS stand for?

Answer 19

Enhanced Ground Proximity Warning System

Question 20

If fitted, this will give a “too low” gear warning when passing a specified radio altitude with the gear not locked down.

Answer 20

Enhanced Ground Proximity Warning System (EGPWS)

Question 21

A means of lowering the landing gear and locking it in the down position is provided to cater for the possibility of ________ in the normal system.

Answer 21

failure

Question 22

Once the up locks have been released, the landing gear lowers or free falls under its own weight and the down locks are engaged mechanically by _______.

Answer 22

springs

Question 23

In the typical system, pulling the handle to the ________ releases the door up lock allowing the door to fall open.

Answer 23

first detent

Question 24

Pulling the handle to the ________ releases the gear up lock which allows the gear to drop to the down position.

Answer 24

second detent

Question 25

A heavy spring in the down lock actuator forces the over center mechanism into the __________ position.

Answer 25

locked down

Question 26

If the gear has been lowered by free fall method, there will be no power available to close the hydraulically operated doors after extension so they will remain open, and the door open light will remain illuminated.

Answer 26

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