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AV Fundies > AAS focused study > Flashcards

AAS focused study Flashcards

1
Q

Function of a start generator system?
(Book 1)

A
  • A DC motor is used in a starter generator system to start the aircraft engine
  • It can then be used as a generator to supply the aircraft DC bus and recharge the battery.
  • Still used in light aircraft’s where weight is a major consideration
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2
Q

Bleed air sources - the starter motor is rotated by 3 main power sources, these are?
(Book 1)

A
  • Air intake from an external ground supply
  • APU
  • Bleed air from running engine
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3
Q

Purpose / function of an APU in an automatic starting system used in modern aircraft’s?
(Book 1)

A
  • Forms integral part of the engine starting system
  • Supply low pressure air
  • Commands / controls signals to components in the engine control system
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4
Q

Control and indication system - what does the GTS stand for and indicate?
(Book 1)

A
  • Gas turbine start caption in the cockpit
  • Comes on to indicate that the APU is running and ready to supply low pressure air
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5
Q

Propeller synchro phaser system - function and purpose?
(Book 2)

A
  • Allows for matching of engine RPMs
  • Allows the pilot to select a phase relationship between props
  • Phase relationship can be varied to minimise vibration and noise
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6
Q

Propeller synchrophaser target - where is it installed?
(Book 2)

A
  • Installed on the on the de-icing platter located immediately adjacent to the back of the propeller
  • A magneto pick up is installed on the propeller brush block
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7
Q

Electric-hydraulic operation block diagram - name the components?
(Book 3)

A
  • Control column transducer (Yellow box)
  • Attitude and rate (Red box)
  • Flight control computer (Blue box)
  • Airspeed altitude (Orange box)
  • Servo unit (Green box) / LVDT (Attached - Red rectangle) !!!!
  • Control surface (Wing shape)
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8
Q

Undercarriage indication system - what do the following symbols represent?

  • Miniature wheel
  • Striped display (Barbers pole)
  • Word ‘UP’

(Book 4)

A

Refers to the positioning of landing gear as below -

Miniature wheel: ‘Down and locked’

Striped display (Barbers pole): ‘In transit’ or when elec power is OFF

Word ‘UP’: ‘Up and locked’

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9
Q

Landing gear warning system - Function of the differential pressure switch?
(Book 4)

A

Will close when the airspeed falls below a predetermined level (this speed will vary for different aircraft types)

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10
Q

Skid control system - Functions?
(Book 4)

A
  • Normal skid control
  • Touch down protection (Weight on the wheels and travelling over 25kph) !!!!!!!!!!!!
  • Fail-safe protection
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10
Q

Typical anti-skid system block diagram - Components?
(Book 4)

A
  • Brake /rudder pedals (As displayed)
  • Brake control servo valve (Middle top box)
  • Skid control valve (Middle box)
  • Skid control box (Middle bottom)
  • Skid control generators (on wheels x 2) !!!!
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11
Q

Navigation lights - Where are they located?

Red
Green
White

(Book 5)

A

Red - Left (Port)
Green - Right (Starboard)
White - Rear

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12
Q

Anti-collision lights - Typical frequency of flashing?
(Book 5)

A

80 - 90 cycles per minute

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13
Q

Thermocouple sensor - Construction?
(Book 5)

A
  • 2 dissimilar metals joined at both ends to form a cold and hot junction
  • If 1 junction is heated, current proportional to the difference in temperature between the 2 junctions will flow in the circuit
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14
Q

Light refraction system - Components of the light refraction smoke detection system?
(Book 5)

A

Left to right

  • Air to compartment
  • Pilot light
  • Test LED
  • Photo diode
  • Light trap

28VDC

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15
Q

Extinguisher bottles / tanks - Components?
(Book 5)

A
  • Squib!!!!!!!!
  • Elec harness
  • Discharge outlets
  • Fill fitting and safety cap
16
Q

Combustion heaters - requirements?
(Book 7)

A
  • Fuel to burn
  • Ignition to ignite the fuel
  • Combustion air to support the flame
  • Ventilation air carry the heat where it is required
17
Q

Supply and exhaust systems - An equipment cooling system can use either 1 or both of what systems to remove heat from equipment?
(Book 7)

A
  • Supply system
  • Exhaust system
18
Q

Function of low flow sensors?
(Book 7)

A
  • Equipment cooling systems uses low flow sensors to monitor the cooling quality of air through the system
  • When a low flow occurs, the low flow sensor supplies an alarm signal to the flight deck for notifications
19
Q

On medium to large pressurised aircrafts, the ventilation system is an extension of the air-cycle air conditioning system. Air is distributed around the interior of the fuselage using what?
(Book 7)

A

Ducting and vents placed at locations around the cockpit and cabin

20
Q

Air cycle, air-conditioning system - What is used if the air is too dry?

A

Humidifier

21
Q

Fuel control unit - A fuel control unit is installed on a turbine based engine to regulate the supply of fuel to the combustion section of the engine. What 3 ways can this be achieved?

A
  • Hydro-mechanical
  • Hydro-mechanical/electronic
  • Fuel authorised digital engine control (FADEC) !!!!!
22
Q

Fire extinguishing agents - Commonly used agents? and precautions to keep in mind?

A
  • Carbon dioxide
  • Freon (Halon 1301)
  • Methyl bromide (Halon 1001)
  • Chlorobromomethane (Halon 1011)
  • Carbon tetrachloride (Halon 104)
  • Dibromodifluoromethane (Halon 1211)
  • Bromotrifluoromethane (Halon 1301)

No unauthorised discharge

23
Q

Flood lights - common types and uses in aircrafts?

A

Floor lights
- Mounted at floor level to illuminate walkways and stairways

Doom lights
- Usually situated overhead to illuminate an area such as: the cockpit, passenger, cargo or galley area
- Typically white light

24
Q

Aircraft lighting - Operation of trans-illuminated panels?

A
  • Sometimes known as edge lighting
  • Method of using to illuminate etched inscription on the cockpit panels to make them readable under night conditions
25
Q

Strobe lights - frequency of flashing?

A

70 times per minute

26
Q

Prop control system - what is the brains of the system?

A

Prop governor

27
Q

HEIU - what does it stand for? 2 classifications?

A

High energy ignition unit

  • High joule
  • Low joule
28
Q

DC tremor operated HEIU - Normal rate of sparks?

A

60 - 100 sparks per minute

29
Q

HEIU - Safety precautions?

A

Removal - Disconnect input first
Installation - Connect output first

  • Allow the recommended time to elapse before touching it
30
Q

Magneto ignition system - components?

A
  • Magneto
  • Auxiliary starting device
  • Ignition switch
  • Ignition harness
  • Spark plugs !!!!!!!!
31
Q

Air cycle, air-conditioning system - Temperatures to keep in mind?

A

200 degrees: from the engine compressor stage

5 degrees: after travelling through the heat exchangers, compressor, turbine, water separator and humidifier

18 degrees - 30 degrees: final result with 200 from the engine and 5 from the cooling process - both found in the mixing chamber

AV Fundies (11 decks)

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