Airframe & Systems Interne Prüfungen 2
LAT Bremen
LAT Bremen
Set of flashcards Details
| Summary | This flashcard set covers advanced university-level topics on aeroplane systems, focusing on cabin pressure, fire extinguishing, and anti-icing mechanisms. It delves into the operation of oxygen systems, engine controls, and flight deck indications, providing detailed insights into the technical aspects of aeroplane maintenance and safety. Pilots, engineers, and aviation students will find this set particularly useful for understanding the intricate workings of modern aircraft systems and ensuring safe and efficient flight operations. |
|---|---|
| Flashcards | 54 |
| Students | 6 |
| Language | English |
| Category | Technology |
| Level | University |
| Created / Updated | 23.04.2019 / 15.05.2019 |
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What is the working principle of an electronic cabin pressure controller?
The controller regulates automatically...
- ground pressurisation
- cabin rate of climb and descent
- cabin pressure altitude according to positive differential pressure
Maximum operating altitude is determined by the...
maximum cabin differential pressure
What kind of control system needs an artificial feel system?
fully powered control system
When is the hot air wing-anti ice system used?
- in icing conditions,
- it is activated prior to ice accumulation
- it is used only in flight
The method to detect ice during flight on the aeroplane with the help of an electromechanical system is to detect...
the change in detector oscillation (resonance) frequency
What are the fuel system indications usually provided in the flight deck of a large transport aeroplane?
- Electrical fuel quantity indication
- Fuel Flow indication
- Fuel temperature indication
- Fuel valve position indication
- Fuel filter bypass warning (light)
- Low (boost pump) pressure warning (light)
What kind of pumps are usually used on transport aircraft as tank pumps (boost pumps) of the fuel system?
low pressure pumps / centrifugal pumps
How is the wing tank ventilation of a large aeroplanes arranged and what is the function of this type of ventilation?
- Ram air is picked up for ventilation.
- The ram air is guided through a surge and vent tank at the wing tips and vent lines into the tank.
- Ventilation avoids an excessive build up of positive or negative pressure inside the fuel tank.
- The use of ram air helps to avoid vapour build up at high altitudes.
What is the reason of flight deck window heating?
It is
- to provide (better) elasticity (2)
- to avoid ice formation and fogging. (2)
If the fire warning of an engine indicates an engine fire, what is the pilots action for fire extinguishing and what is the resulting extinguishing system configuration/action?
- The pilot will push the respective fire extinguishing button (e.g. A320) or will pull the respective fire handle (e.g. B737).
- Due to this the extinguishing is prepared (e.g. closure of engine fuel valves) and the extinguishing bottle is armed.
Describe an engine fire warning
Warning =
bell +
individual engine fire warning light
How many extinguishers must be provided for the main engines and the APU and other combustors by the fire extinguishing system of a large aeroplane (CS25)?
- The extinguishing system
- must provide one single-shot system for APU, burning heaters, and other combustion equipment.
- must provide two adequate dischargers for any main engine installation.
Describe an engine fire extinguishing process:
Step one:
pilot prepares extinguishing by arming the system (push fire extinguishing button or pull extinguishing handle)
Step two:
release extinguishing agent (by pushing the discharge switch or turning the handle)
(two steps, 2 points)
What will happen if the maximum pressure of the fixed installed oxygen bottle is exceeded?
oxygen is discharged overboard
What means "diluter-demand" concerning the flight deck oxygen mask?
When this mode is selected, the mask provides
oxygen mixed with ambient air,
and only when inhaling.
Name the operational modes of a flight deck oxygen system
normal (diltuter-demand) (1)
100% Oxygen (1)
emergency (100% Oxygen, constant flow) (2)
Passenger Oxygen system:
Describe the operation of an oxygen generator
The generator starts if the mask is pulled.
In the generator a burning process generates oxygen for passenger use.
Once initiated, the process cannot be interrupted.
How is the passenger oxygen system activated if oxygen generators are used?
- The passenger oxygen masks are provided by releasing (drop down)
- if the cabin pressure altitude exceeds the limit or when the system is activated by the respective switch in the flight deck.
- The system is "armed" by releasing the passenger oxygen masks.
- The oxygen supply is initiated by pulling one of the generator's oxygen masks.
List the correct actions that are required to get automatic deployment of ground spoilers after landing touch down (auto spoiler) and to retract the spoilers
- during approach, in-flight prior to landing: speed brake lever in ARMED position
- after touch down, extension : load on landing gear shock strut (compression) and wheel spin up
- for retraction: speed brake lever in DOWN position
A cabin door of a large transport aeroplane (e.g. A320) is used as an emergency exit.
Describe its features and operation
The door is marked at the outside and has a sign "exit" at the cabin side,
door handles are at the cabin side and at the outside,
as a large door at a hight of more than 6 ft, it is equipped with a slide,
the slide is automatically inflated when opened in "flight"-mode
slide inflation is arranged by the help of nitrogen expanding from a self contained slide inflation bottle.
Take into account a large transport aeroplane (CS25)
List the requirements for emergency exits
- there has to be an emergency exit on both sides of the aeroplane
- must provide the capability to empty the aeroplane within 90 seconds using half of the number of exits only, and during darkness
- are equipped with a slide or ramp if the exit is " too high" above the ground.
- It has to be marked : "EXIT"
- are marked on the outside by a band of contrasting colors
- to be opened from the in- and outside
- opening must be simple and obvious
- must have a handling instruction
- protected against inadvertent opening
- can be operated in PARK- and FLIGHT position.
- must be easily accessible
- free of obstructions
What is the purpose of an accumulator in a hydraulic system?
The accumulator of the hydraulic system is used...
for damping pressure surges (peaks) in the system.
as a storage of engergy, i.e. it provides the ability to drive a unit one time or several times even if the pumps do not work or it helps if a lot of working units have to be driven at the same time.
What is the right sequence of components in the air cycle system (boot strap system)?
- primary heat exchanger
- compressor
- secondary heat exchanger
- turbine
In which way is the cabin pressure regulated in a large aeroplane with pressurized cabin?
- Steady airflow into the cabin
- pressure regulation by variation of airflow leaving the cabin.
During cruise flight, the cabin air for conventional large turbofan driven aeroplance (like B737 or A320) is usually supplied by...
- the air conditioning packs which are supplied
- by main engine compressor bleed air
In jet engine driven aeroplanes the "thermal anti-ice system" is primarily supplied by...
... bleed air from the engines
What is the relation between cabin pressure and ambient pressure (aeroplane with pressurised cabin in cruise flight)?
The cabin pressure is...
higher than ambient pressure
What is a cabin rate of descent?
The increase in cabin pressure is expressed as cabin rate of descent.
How do cabin pressure and atmospheric pressure change under normal condition during climb after take-off with an aeroplane equiped with a pressurised cabin?
Please consider also the rate of change.
Both decrease, but cabin pressure decreases more slowly than atmospheric pressure.
Define "cabin differential pressure"
cabin pressure minus ambient pressure.
Primary flight controls:
List all the controls wich are primary flight controls according to CS25 (large transport aeroplanes)!
- aileron
- rudder
- elevator
- roll spoiler
What is the task of the fan-air-pre-cooler in a bleed air powered pneumatic system of a turbine engine driven aeroplane?
It is to decrease compressor bleed air temperature before it is distributed and used in the pneumatic system
For a flap system, outline the "load limiting protection"
It protects the flaps from excessive airload by retracting the flaps automatically at a certain flight speed.
What are the advantages of a Fly-by-wire (FBW) system in comparison with a conventional flight control system?
- lower weight
- lower pilots workload
- flight envelope protection
What are the possible air sources for the pneumatic system of a turbine engine driven aeroplane?
- main engine (compressor) bleed air
- APU (compressor) bleed air
- ground supply
- engine driven or electric motor driven compressor (e.g. 787)
What are the components of a Fly-by-wire (FBW) system?
- control stick or column
- electrical signalling system
- flight control computer
- actuator und control surface
Name all indications of the cabin pressurization system of a jet transport aeroplane!
1) Cabin altimeter / Cabin altitude
2) Cabin differential pressure
3) Cabin vertical speed
4) Outflow Valve position
5) Pressurisation System Mode indication (e.g. Auto or Manual)
Name all warnings of the cabin pressurization system of a jet transport aeroplane!
1) Cabin altitude warning
2) Cabin differential pressure warning
Consider a large transport aeroplane with a pressurized cabin.
Is there a warning if the pressure inside the cabin gets too low?
If there is a warning, please describe it.
aural Cabin altitude warning
warning is triggered if cabin altitude exceeds 10000 ft
What is the pilots action if the cabin altitude rises (slowly) above 10000ft?
- analyse the situation,
- options are:
- check automatic cabin pressure controller
- Close outflow valve manually
- reduce flight altitude
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