Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

CAPTAIN PREP > Study Guide Questions and Limitations OAK > Flashcards

Study Guide Questions and Limitations OAK Flashcards

1
Q

Fuel Limitations

A 
Minimum Fuel Temperature: - 43 C
Maximum Fuel Temperature: 54 C
Minimum Fuel Quantity at Takeoff: 1500 kg
Approx Fuel Quantiy:
Outer tanks: 700 kg
Inner tanks: 5500 kg
Center tanks: 6500 kg
Total: 18.900 kg
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Which side supplies the APU with fuel?

A

APU is supplied by engine 1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are the suction Valves? fuel

A

The suction Valves are held closed by fuel Tank Pressure created by the Tank Pumps. They are located in the inner tank. In an electrical failure, they remain Open as the pressure within the tanks fails and the engines will be able to be Gravity fed.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Described the Fuel Recirculating System?

A

Fuel from the HP fuel valve is diverted through the heat exchanger of the IDG. Heat from the Oil within the IDG is radiated through the fuel in the exchanger which in turn heats the fuel in the tanks.
Fuel is than routed via the HP fuel feed and sent back to the outer tanks.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

How is the Center Tanks prioritised?

A

Centre Tank Fuel pumps deliver fuel at higher pressure than the fuel pumps of the inner tanks. Because of this, when the centre tank pumps are on, the centre tank will drain before the inner tanks.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Why is the Centre tank fuel prohibited for takeoff?

A

If the Centre tank fuel was used during takeoff, any fuel returned to the outer tanks from the recirculating system would cause the tank surge vent to spill the excess fuel overboard.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Can you refill/refuel on battery power only?

A

Yes as there is a switch on the refuelling panel to enable this to happen.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What are fuel Jet pumps?

A

There is 1 Jet Pump in each inner Tank and the function is to draw fuel from the centre tank to the inner tank.
This is done by creating a Vacuum that pulls fuel through the centre tank transfer valves.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Fuel Leak Failure

A

FUEL LEAK
- Firstly identify the source of the fuel leak by reference to the QRH and checking the Fuel SD page
- Consider potential divert options, expand range and view suitable airports
This is a time critical failure and care must be taken to establish the source of the fuel leak. This could be either from the Centre tank, Inner tank or from the Engine / Pylon.
Leak confirmed from engine / pylon – shut down engine to isolate fuel leak.
Leak NOT confirmed, isolate each tank to check depletion rate from each tank.
Do NOT open the fuel X – feed unless you are absolutely sure that in doing so, all of your available fuel will not be lost.
Use ALL available sources to confirm this including visual checks by Cabin Crew from the Cabin windows, as well as the contents of the fuel tanks via the fuel SD page.
LAND ASAP – MAYDAY
- Once the fuel leak is secure or confirmed, a diversion must be initiated to a suitable airfield.
- CM2 to fly the Aircraft and CM1 to deal with the failure and ensure the aircraft is secure and fuel is preserved where possible.

Threat Considerations:

  • Avoid Holding if possible to save time
  • Possible consideration for a single Engine approach and landing if an engine shut down will be carried out.
  • Diversion Airport to have suitable ground facilities in the event of a fire.
  • Do NOT use Reverses on landing.
  • Try to use the full length of the runway to keep brake temperature to a minimum.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

FUEL IMBALANCE:

A

A fuel imbalance may occur for various reasons, the most common is with single engine operations and a fuel leak scenario.

Allow time for a fuel check to identify the correct tank if a fuel leak is suspected. If a fuel leak is suspected, refer immediately to the QRH FUEL LEAK procedure.
Whilst there is no mandatory need to balance the fuel tanks until the ECAM fuel advisory limit has been shown, it is considered good airmanship to balance the tanks at an appropriate time.

Advisory limit: One Tank more than 1500 kg than the other tank.
Handling is not affected even with the maximum imbalance.
To balance the tanks, use QRH Fuel Imbalance procedure:
- FUEL X FEED – ON
on the lighter side and the centre tank
- FUEL PUMPS – OFF
When balanced
- FUEL PUMPS – ON
- FUEL X FEED – OFF

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

GRAVITY FUEL FEEDING:

A

This procedure may be required if there is an issue with the fuel pumps.
- ENG MODE DEL – IGN
This protects the engine against any fuel interruptions
- Avoid Negative G – Factor
Hopefully this will not be an issue as to keep gravity working in the correct direction.
There is an Altitude restriction at which this procedure can be carried out. This is depending on weather the fuel has had time to deaerate or not.
Note: If both pumps lost, and X – feed is on, this is not gravity feeding, and counts towards the time above this required level.

Example if loosing Pumps 10 minutes after above eg. FL 330, and you start X – Feeding for 20 minutes, then you will have been 30 minutes above FL300, and can use the higher Flight Level.
Notice main issue is Fuel imbalance, and possible Fuel starvation towards the end of the flight in one of the engines.
Check QRH for different versions:
FL360 if flight time above FL 300 greater than 30 minutes
FL260 if flight time above FL 300 less than 30 minutes
FL150 or 7000 ft above Takeoff Airport if FL300 never exceeded.

When at gravity feed ceiling:
- FUEL X FEED – OFF
If NO FUEL LEAK and with one Engine Running:
- FUEL X FEED – ON
- BANK ANGLE – 1 DEGREE WING DOWN ON LIVE SIDE
This ensures fuel on the running engine side is used.
- RUDDER TRIM – USE
Use to maintain the correct course.
If the imbalance reaches 1000 kg or more, adjust the wing bank angle to 2 – 3 degrees wing Down.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

AIR CONDITIONING, VENTILATION, PRESSURISATION

LIMITATIONS

A

LO – 80% of normal flow – Pax numbers 130 or less
NORM – 100% of normal flow. + 130 Pax
HI – 120 % of normal flow – High Temperature

Max Positive differential Pressure: 9.0 psi
Max Negative differential Pressure: -1.0 psi
Safety relief Valve Operation: 8.6 psi
Max norm Cabin Altitude: 8000 ft
CAB ALTITUDE Warning: 9550 ft + / - 35 ft
RAM Air Max Diff: 1 psi

More than 20 minutes without Air Conditioning will reduce the quality of the air within the Cabin and is NOT advised.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

How is the Temperature regulated by the Air Conditioning System?

A

Both Air Conditioning Pack outlets feed into the Mixing Unit. The output temperature of the packs is driven by the lowest selected of the 3 Zonal temperature controllers, so that air within the Mixer unit will be equal to the lowest selected temperature.
As air is ducted to the 3 Zones, Hot Bleed Air is added via the trim air valves to optimise zonal temperature.
(and recirculated Cabin Air)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What do the Trim Air Valves do?

A

Add HOT air to the cool air ducted in to the Cabin to optimise the cabin air temperature.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

How many Air Conditioning Controllers are there and what do they control?

A

There are 2 Air Conditioning Controllers.
Controller 1 Controls pack 1 and vice versa.
Controller 1 controls Cockpit temperature and Controller 2 controls BOTH Cabin zones.
The Controllers allow the Air Conditioning system to be fully Automatic. They control the Pack Control Valve, the Air Trim air valves and the pack outlet temperature via the Pack turbine bypass valve.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

. What is the purpose of the Ram Air inlet and when will it be opened if pressed?

A

It enables the Cabin to be supplied with fresh air in the event of Smoke or loss of Both PACKS.
It is activated via a guarded PushButton on the Overhead panel.
The Valve will open automatically when pushed, however the Cabin differential Pressure must be below 1 psi (otherwise no air will be supplied)
RAM Air Pushbutton shall not be selected until FL 100 or below.
Once pushed, the outflow Valve will open to approximately 50% and the Ram Air door will open.
If the Pressure differential is above 1 psi, a check valve downstream will not open and no air will be supplied – i.e atmospheric Ram Air can only be used in a depressurised Aircraft.

17
Q

. Where are the 3 Zonal temperatures measured?

A

Cockpit – behind the FO seat.

Cabin zones – Lavatory extraction system and the galleys.

18
Q

What occurs if an Air Conditioning controller suffers a single or dual channel failure?

A

The Air Conditioning Controller will still function with a single lane failure. A dual lane failure will cause the loss of the controller

19
Q

What happens if a Hot Air Valve fails?

A

If it fails in the OPEN position, there is no effect.
If it fails in the CLOSED position, the Trim Air Valves will not be supplied, so temperature control of the Cabin is lost.

20
Q

What happens if a Trim Air Valve Closes?

A

Temperature Control is lost in that cabin zone.

21
Q

The RAM AIR inlet flaps automatically close under 2 conditions, what are they?

A

Takeoff – T/O Power set and Main Landing Gear (MLG) struts Compressed
Landing – MLG struts compressed, speed greater than 70 kts

22
Q

What is the ACSC and what does it do?

A

Air Conditioning system Controller. Each ACSC regulates the temperature of its associated Pack by modulating the bypass valve and Ram Air inlet flap. It has the following functions:

  • Pack Operation control
  • Controls Pack Flow Control valve
  • Controls Hot Air pressure regulating Valve
  • Controls Trim Air valve
  • Regulates Temperature and flow
23
Q

What is Pre – Pressurisation mode?

A

Active during Takeoff Roll, the Outflow valve moves towards closed position, the pressure in the Cabin then increases to 0.1 psi above ambient to avoid a cabin surge during rotation.

24
Q

When do de-pressurisation and Ground modes activate and what happens in Automatic mode?

A

De-pressurisation mode occurs on touchdown which releases any Cabin overpressure. Ground mode occurs 5 seconds after Landing at which point the outflow valve fully opens.

25
Q

What is the Maximum Cabin Altitude in Automatic mode?

A

8000ft

26
Q

What does the pressurisation system use in Automatic mode as reference for Landing Elevation?

A

The destination QNH from the PERF APPR page and the airfield elevation from FMGC.

27
Q

How is manual Pressurisation achieved and how does it work?

A

By using the Manual override Pushbutton on the Overhead panel. The third motor for manual mode is now energised.
Manual control is achieved through a dedicated part of the CPC1 which remains available even in dual CPC failure.
Cabin Altitude is controlled using the toggle switch which adjusts the position of the outflow valve.
Pressurisation will now be displayed by ECAM.

28
Q

What pressurisation procedures are available in the QRH?

A

Cabin Overpressure –
Should be initiated as soon as control is lost of the pressurisation system, leading to over pressurisation.
This is usually due to a loss of control of the outflow valve.
A simple solution to this is to turn off the Packs, then turning the Blower and Extract to OVERride, which will vent Cabin Air overboard.
Now the pressure can be monitored and by selecting packs On / Off, there remains a way of controlling the pressure.

29
Q

CAB PR SYS 1+ 2 FAULT

A
  • Manual Control of Pressurisation required
  • Achieved by selecting MODE SEL to MAN and using Manual Toggle switch to operate the Outflow Valve
  • Toggle Down – Closes Outflow Valve – Cabin Altitude Descends
  • Toggle UP – Opens Outflow Valve – Cabin Altitude Climbs
    Target Cabin V/S:
    Climb: 500 ft/min
    Descent: 300 ft/min

Threats:
- Over Pressurisation (resulting in the operation of the Safety Valve)
- Under Pressurisation (resulting in CAB PR EXCESS CAB ALT)
Flying at lower levels will enable easier control of the Cabin Altitude / Differential Pressure.

STRATEGY 1:
Maintain a Cabin V/S of 300 ft/min in descent. If a Level Off is required, ensure V/S 0.
Maintain Cabin Altitude between destination altitude and 8000 ft, pressure between 0 and 8 psi. During Final Approach, fully open Outflow Valve – Full UP

STRATEGY 2:
Maintain the Cabin Altitude at its original value, eg.8000 ft. Descend down to 8000 ft and once reached, the Outflow Valve can be fully opened.
This provides less management of the system manually.
Once below 8000 ft however, ensure that the V/S does not exceed 1800 ft/min otherwise the ADV will be shown.

30
Q

CABIN OVERPRESSURE

A

This failure requires the pilots to reduce Cabin Pressure to avoid any further over-pressure.

  • Select PACK 1 or 2 OFF
  • Ventilation Blower – Override
  • Ventilation Extract – Override
    This will put the aircraft in the Smoke removal configuration which moves Cabin air overboard and reduces Airflow into the Cabin.
    Monitor the Cabin Pressure, if it goes above 9 psi, then turn off the remaining Pack.
    As Cabin Pressurisation is now unreliable, LAND ASAP appears requiring an expeditious descent.

Landing:
- 10 minutes prior to landing, both Packs – OFF
- Return Ventilation system back to the normal configuration
Check Cabin Pressure is zero prior to opening Cabin Doors

31
Q

CAB PR EXCESS CAB ALT

A

Time of useful consciousness at FL390 is in the region of 15 seconds.
The physiological experience will be unpleasant.
The flight deck visibility will be reduced and pain will be felt in the ears.
- Immediately don OXYGEN MASKS to prevent incapacitation.
- Ensure POSITIVE confirmation CAB PR EXCESS CAB ALT
- Initiate Emergency Descent

Immediate Actions:
ALT		TURN & PULL
HDG		TURN & PULL
SPEED	PULL
READ FMA
PM: Signs ON and Check FMA
Memory items
QRH
ECAM
Threats:
AVIATE, NAVIGATE, COMMUNICATE
-	Ensure you maintain situational awareness – MSA?
-	Aircraft below you, head of Standard routing.
-	Advice ATC and Squawk 7700 when able
  • Use of Autopilot and Autothrust is highly recommended
  • If no structural damage suspected, use Speedbrakes to expedite descent to FL 100
    (Monitor increase in VLS – potential to activate Angle of Attack protection / AP disconnect)
  • In idle Thrust (Thrust Idle), with Speedbrakes extended, Rate of Descent is approx. 7000 fpm.
    Descent from FL390 to FL100 will take approx. 4 minutes and 40 Nm
  • If Cabin Altitude goes above or is likely to go above 14.000 ft, press MASK MAN ON pb.
    This ensures the passenger Oxygen masks are released.

CAPTAIN PREP (19 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions