FCOM Systems Flashcards
When do the safety valves operate (psi)
More than 8.6
Less than -1
Where do we have smoke detection? 3
The lavatory
Cargo compartments
Avionics bay
What does pressing the fire PB actually do? 8
Silences the aural fire warning Arms the squibs Closes the LP fuel valve Closes the engine bleed air valve Closes the pack flow control valve Closes the hydraulic fire shut off valve Disconnects the FADEC power supply Deactivates the IDG
During an RTO, past what speed would you get ground spoiler deployment?
72kts
When do the ground spoilers deploy on landing?
Armed / not armed
Armed:
Both main landing gears on ground and both thrust levers at idle or below (or reverse on one engine).
Not armed:
Both main landing gears on ground and REVERSE selected on atleast one engine.
When do we get partial ground spoiler deployment?
Spoilers armed/ not armed
Armed:
One main gear on ground both thrust levers at idle.
Not armed:
one main gear, reverse on one thrust lever.
Armed (bounce)
Both main gears on ground with both thrust levers in climb or below.
What is aileron droop?
The ailerons (droop) extend down 10 degrees with flaps extended to use the ailerons as wing flaps and provide more lift at low speed.
When do the LGCIU’s switch over?
After one complete gear cycle
Or In the event that one fails.
The landing gear panel on the middle console is connected to which LGCIU?
LGCIU 1
How many degrees of nose wheel steering do we get from:
Rudder pedals
Hand wheels
And at what speed to we have none?
Rudder pedals
+- 6 progressively less to 130kts
Hand wheel
+-75 progressively less to 80kts
On the ECAM
We see NW STRG DISC in green meaning the selector is in the towing position.
When does this memo turn amber?
If one engine is running
Below what speed does anti skid deactivate ?
20kts
Careful tasting
How does anti ski work?
The speed of each main wheel is measured using a tachometer and is compared to the aircraft reference (ADIRU) speed.
If the speed of the wheel goes below 0.87 x ref speed then it is skidding and anti skid kicks in.
Above what speed to ground spoilers extend?
72kts
Therefore during an RTO autobrake wont kick in unless above this speed!
When does auto brake kick in?
Ground spoiler extension
What is required to arm the autobrake ?
Green hydraulic
Anti skid electrically powered
1 ADR
When is auto brake activated?
When ground spoilers deploy
Why is brake pressure on alternate without anti skid limited to 1000psi?
To stop wheel locking and tyre burst
What are the different types of autobrake?
What are they’re rates of application?
Max - straight after ground spoiler deployment (>72kts)
Med- 2s after ground spoilers, 3m/s^2
Lo- 4s after ground spoilers,1.7m/s^2
What percentage of required braking is needed for the decel light?
80%
When does the PTU run automatically?
When the differential pressure between the green and yellow system is greater than 500psi
Why are hydraulic reservoirs pressurised?
To prevent cavitation
How many litres of hydraulic fluid are there in each system?
When does the low level warning go off?
Green 14.5l
Yellow 12.5l
Blue 6.5l
Below 3.5l low level warning
Box at top of the scale is worth about 2.5l
Below what hydraulic pressure does the icon turn Amber and produce an ECAM?
1450psi
Above what level do we get an advisory for N1 and N2 engine vibration?
N1>6 units
N2>4.3 units
A319/320 Fuel capacity:
Centre tank
Inner tank
Outer tank
Total capacity in KG
6.5T
5.5T
690kg
Total 19T (slightly under on some)
A321 Neo Fuel capacity?
19T
Only has wing tanks, no inner/outer
When do the engines feed of centre tank fuel?
After slat retraction and 500kg burnt out of each inner tank.
Why does 500kg need to be burnt from the wing tank before centre tank feeding can take place?
Because cold fuel is circulated from the centre tank to the IDG for cooling and then deposited back in the wing tanks (outer first).
Without burning 500kg first from the wing tank it would overflow into the vent surge tank.
This is because the wing tanks are always fuelled to capacity first before any fuel goes into the centre tank.
Can we refuel on batteries only?
Yes
What is a fuel tank inerting system?
Where do we have it?
Air is bled from the engines and goes through an inert gas generation system IGGS where it’s oxygen levels are reduced.
The oxygen depleted air then replaces the ambient air in the centre tanks only, to reduce the flammability of the fuel in there.
What do two amber dashes across the last two digits of a fuel figure mean?
That the FQI is inaccurate
If a fuel figure is boxed Amber what does it mean?
What happens to the total fuel indication?
That the associated valve has failed to open and the fuel is now unusable.
The total fuel will then be half boxed amber. Meaning the total fuel is not all useable.
What’s the difference between dropping the rat on the emer elec pwr panel and hydraulic panel?
Emer elec pwr
The blue hydraulic system drives the emergency generator supplying electrical power.
Happens automatically when AC bus 1&2 is not supplied and a/c speed >100kts
Happens manually when pressed.
Had panel - Rat Man On button
Drops the rat and supplies the blue hydraulic system. Emergency gen won’t run!
What psi does the blue system run at when powered by the rat?
2500psi
Above what differential pressure on the green and yellow hydraulic system does the PTU operate?
When else does the PTU run? (Tested)
500psi difference
Inhibited during first engine start, tested during second engine start.
What does a hydraulic priority valve do?
Cuts of hydraulic power to heavy load users if system pressure gets low.
Such as gear, slats, flaps.
Ex. Gravity gear to be used instead even with a blue and yellow failure.
Why are the hydraulic reservoirs pressurised?
When does the pressurisation come from?
To prevent cavitation
HP bleed air from eng 1