Airframe Systems and Components (position and warning & ice & rain)

Question 1

Purpose of antiskid system?

Answer 1

permit effective breaking throughout landing roll regardless of runway

Question 2

what does antiskid warning light indicate?

Answer 2

that the system is off or there is a system failure

Question 3

what type of warning devices are usually provided for retractable landing gear?

Answer 3

red light and aural tone

Question 4

when does the orange device operate in a landing gear warning system?

Answer 4

Throttles retarded and you’re in any position other than down and locked

Question 5

what type of position indicators are normally used to indicate that the landing gear is down and locked?

Answer 5

Normally there’s a greenlight for each gear.

Question 6

Which positions of the retractable landing gear normally have a position indicator?

Answer 6

Open locked, down unlocked, in transit.

Question 7

What is a squat or wait on the wheel switch and where is it located?

Answer 7

Switch that detects if aircraft is on the ground. It will be located in torsion link to main landing gear and prevents accidental traction of the gear while the aircraft is on the ground

Question 8

what device is used as a sensor to detect the condition of a retractable landing gear?

Answer 8

microswitch WOW Squat switch

Question 9

when should you check landing gear switches, lights, warning horn, or buzzer for proper operation?

Answer 9

During a landing gear retraction check or swinging the landing gear

Question 10

how does a takeoff warning horn differ from a landing gear warning horn?

Answer 10

Takeoff horn is intermittent whereas landing gear warning is continuous

Question 11

what items may cause a takeoff warning horn to operate in a typical transport jet aircraft?

Answer 11

If throttles are advanced and any of the following conditions exist, to takeoff warning horn will sound.

1. speed breaks not down.
2. What apps not in takeoff range
3. Auxiliary power exhaust door open
4. Stabilizer not and take a setting

Question 12

what is the master caution light ?

Answer 12

It is a light that alerts the pilot if there is an abnormal, or a change in condition with one of the aircraft systems.

Question 13

What is used to indicate the position of wingflaps?

Answer 13

Resistance type remote indicating system

Question 14

describe operating principle of inflatable deicer boots?

Answer 14

Pneumatic deicing system they use rubber inflatable boots attached to leading edge of the wing and stabilizers. Wings inflate and deflate at the same time.

Question 15

Why is it critical to prevent the formation of ice on aircraft wings and control surfaces?

Answer 15

Add stress to the airframe, towards the shape of the wing and air flowing over it. Reducing its aerodynamic lift and also weighs down the aircraft.

Question 16

what are two methods of inflating pneumatic deicer boots?

Answer 16

Vacuum pump or bleed air from turbine engine compressor

Question 17

what methods are used to attach deicer boots to the leading edges of wing and tail surfaces?

Answer 17

Cement, Fairing strips, screws, or a combination of any method

Question 18

what’s the purpose of an air oil separator in pneumatic deicing system?

Answer 18

Removing oil from the air of deicing system to prevent deterioration of rubber deicing boots.

Question 19

What is used to clean deicer boots?

Answer 19

Soap and water

Question 20

what must be done before you can make a cold patch repair to a deicer boot?

Answer 20

clean, rough the surface of the boot and patch, glue and attach

Question 21

what component of a pneumatic deicer system normally allows suction to be supplied to the boots to hold them down in flight?

Answer 21

Solenoid distributor valve

Question 22

describe the operating principle for thermal anti-icing systems?

Answer 22

Are used primarily for the purpose of preventing ice forming on the leading edges. Hot air is routed through a double walled space in the leading edges of the wings to melt or prevent ice formation

Question 23

how can you determine if the heater in a pitot is working?

Answer 23

Turn it on and feel heat coming from it

Question 24

What methods are used to supply sheet for thermal anti-icing systems?

Answer 24

Bleed air from the turbine engine compressor, engine exhaust heat exchanger, and ram air heater by combustion heater

Question 25

How is overheating prevented in a thermal anti-icing system ?

Answer 25

using bleed air thermal switch will cause a shut off valve to close and stop the flow of bleed air when the temperature of leading edge reaches approximately 185°F. When the temperature drops the valve opens and heart bleed air enters the wing once again.

Question 26

What is the purpose of the deice electrical timers?

Answer 26

Inflate the boots symmetrically

Question 27

In a thermal anti-icing system what happens to the air after it has heated the leading edge of the wing?

Answer 27

Air is exhausted to the atmosphere at wingtip or at points where ice formation could be critical.

Question 28

What problems are associated with electrically heated windshields?

Answer 28

Delamination, arcing, scratches and discoloration

Question 29

what is windshield delamination?

Answer 29

Separation of the plies

Question 30

what does arcing usually indicate in an electrically heated windshield?

Answer 30

Breakdown in the conductive of coating

Question 31

name the three methods of removing rain from aircraft windshields.

Answer 31

Pneuatic systems, wipers, and Chemical repellent

Question 32

what type of power is used to operate windshield wiper systems?

Answer 32

Electrical or hydraulic power

Question 33

what are common problems encountered with windshield wipers?

Answer 33

Tendency of aerodynamic forces to reduce wiper blade loading pressure on windshield causes ineffective wiping or streaking. Another problem is achieving fast enough wiper oscillation.

Question 34

How does a pneumatic rain removal system work?

Answer 34

Uses high pressure air, the high temperature engine compressor bleeders blown across the windshield, this air blast forms a barrier that prevents raindrops from striking the surface