Questions tagged [airbus-a320]

The Airbus A320 family is a series of twin-engine, single-aisle passenger jets produced from 1986-present. Different versions can typically carry from 107 to 220 passengers.

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How do the hydraulics in an airplane have constant pressures? What is creating resistance to the pump flow to create constant pressure?

my question comes from the A320 specifically, and I also suppose Boeing jets. Whenever you check the hydraulic system pressures on an A320 it says 3,000 psi, even when you move the flight controls. ...
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What is the purpose of the fuel pumps in the A320?

It might seem like a really stupid question, But i'm getting into flying the FBW A320 in MSFS2020 and I have no idea what the fuel pumps are for in the A320, please may someone explain and help a ...
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What is the difference between A321neo and A321neo LR?

According to the illustration on this Airbus webpage about the A321Neo XLR, the A321Neo has 3500 NM range and A321Neo LR has 4000 NM range which is in conflict with this Airbus website about the ...
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6 votes
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What does this black lever next to the overhead panel on the Airbus 320 do?

What does this do? It's located next to the overhead panel of an A320 cockpit.
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Hearing an deep hum sound, is it the reverse thrust deployment noise?

I have been hearing a deep hum sound from where I live which sounds like an Airbus 320 Family Reverse Thrust deployment noise. NOTE: However I live 15KMS+ from the Airport but the runway approach path ...
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What does the "High Alt Landing" guarded push button on the A320 exactly do?

I am aware that not all variants of the A320 are equipped with the HIGH ALT LANDING guarded push button. I know that it is pushed before landing at high altitude airfields. Was wondering what it does ...
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3 answers
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Were the Airbus A320 rudder hardover issues fixed after Indonesia AirAsia Flight 8501 crashed due to uncommanded rudder deflection?

Indonesia AirAsia Flight 8501 crashed when the rudder made an uncommanded deflection 2 degrees to the left: When the crew was required to fly the Airbus A320 manually, there was an unexplained nine-...
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2 votes
1 answer
212 views

Why we turn off anti-ice first then put on APU bleed after parking? [duplicate]

In A320 Standard Operation Procedure (Parking procedure), the order of parking procedure is anti- ice off then APU bleed as required. Is there any meaning for this order? Can’t we switch the order ...
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764 views

How do you get an "FWC 1+2 FAULT" warning, if at all, on the Airbus A320?

ECAM messages are generated through DMC, which is from FWC and SDAC. The FWCs are responsible for ECAM warnings while the SDACs are for ECAM SD and ENG params. (DSC-31-05-30) My question is: How would ...
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4 votes
1 answer
736 views

Why is 5 seconds the time to respond to a TCAS RA?

With TCAS, the time to respond to an RA is 5 seconds (2.5 seconds for a reversal RA). The FCOM states that the TAU (estimated time) before the aircraft intruder reaches the "Closest Point of ...
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What are the A320 ECAM system displays' dimensions?

I am a student taking up an Aeronautical engineering course. We were assigned to draw A320 ECAM system pages. However, I have a difficulty finding the dimensions for each of the system pages. What are ...
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Where can I find a description of the ECAM system pages?

I'm studying up on the display formats of the System Display (SD) in a typical ECAM. Articles online have stated that it is capable of showing 12 different system pages with different info. However, I ...
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What components does AC bus1, AC bus2, AC EssBus, DC bus1, DC bus2 & DC EssBus supply to in A320?

Under chapter 24 (electrical) of Technical training manual downloaded from this website ( https://vdocuments.mx/reader/full/a320-chapter-24-electrical-power ), What components does all the buses ...
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1 answer
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What are the speeds of the windshield wipers on an A320?

In the Airbus A320, the overhead panel wiper selector knob has three settings: Off, Slow and Fast. At what speed do the wipers operate in Slow and Fast mode?
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In aircraft ventilation, what is meant by temperature increasing/decreasing for calculating the on-ground threshold?

In an open-circuit configuration, in normal operation, the A320 FCOM states: The open-circuit configuration operates when skin temperature is above the on-ground threshold. On-ground threshold = +12C ...
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Why does the INIT page on the A320 MCDU have "FLT NBR" instead of "CALL SIGN"?

My understanding is that the call sign is entered for FLT NBR on the INIT page (e.g. EZY8418), not the flight number (U28418). I have heard of reports of pilots mistakenly entering the flight number ...
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8 votes
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What if you have a double-engine failure after V1 but before VR?

Imagine an A320 on the runway, starting its take off roll. The PM calls out "$V_1$". Just a second after $V_1$ is called out, and before $V_R$, you encounter a double-engine failure (an A320 ...
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5 votes
1 answer
679 views

On the Airbus A320 family, when does the autothrust disconnect?

I know you can press the AT disconnect button on the sides of the throttle. You can press the A/THR button on the FCU. When does it disconnect automatically? For example, on landing.
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Do the different spoilers on an A321 extend by different amounts? [duplicate]

I recently flew with an A321 and watched the left wing while the pilot tested the control surfaces before lift off. I noticed that one of the spoilers angled upwards much less than all others. In the ...
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How does CONFIG FULL provide better handling capabilities in turbulent conditions?

I wanted to get some clarity as to how does CONFIG FULL provide better handling capabilities in turbulent conditions? This line mentioned in the A320 FCTM under the the supplementary procedures ...
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2 votes
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What is the absolute ceiling of the A319-100, B737-700 and A220?

What is the absolute ceiling of the A319-100, B737-700 and A220? I have found the service ceiling in Jane's and their type certificate data sheets, but nothing on the absolute ceiling.
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A320 Avionics Compartment Access Door (Seeking Photo References)

We're software developers currently working on a 3D A320 for training and we're getting quite stuck finding any suitable references of the Aviation Compartment Access Door - specifically both it's ...
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Wing and horizontal/vertical tailplane airfoil type and relative thickness?

I've been searching for data on the airfoil type (namely if they are supercritical, aft-loading etc.) and relative thickness (average or in different positions) of the empennage (both horizontal and ...
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376 views

Conflicting A320 Climb Profiles

In the Airbus brochure (more like a book) Getting to Grips with Aircraft Performance, the standard climb profile for the A320 family is mentioned as 250 kt / 300 kt / M0.78 With this accompanying ...
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14 votes
1 answer
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What are those gray spots on the wing?

I recently flew on an Airbus A321 and noticed these gray spots on the wing, circled in red. What are those?
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Why does the A320 transponder's CLR button do two different things, depending on how many digits were entered?

I have to admit I've only flown in simulators but everyone of them implements the "CLR" button of the transponder in an A320 (maybe also others) the following way: It removes the fourth ...
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Airbus 320 VS mode

I would like to understand how does the thrust control the Speed when we chose to fly in VS mode for climb or descent? I understand the priority is given to the rate of climb/descent when choosing to ...
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6 votes
1 answer
132 views

What is this scoop found on the core of a PW1127G engine near the CC/turbine section?

The view is back to front, the scoop is at 10 o'clock on engine 1. What would be it's function? I need supportive literature as well if possible.
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How can I know the manufacturer of the PFD (Primary Flight Display) of the current mainstream passenger aircraft?

I'm developing a computer vision software based on the photos of these PFD (Primary Flight Display). How can I know the manufacturer of these PFD of the current mainstream passenger aircraft: B737. ...
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1 vote
1 answer
138 views

Why do some Airbus jetliners at full thrust sound like turboprops? [duplicate]

When riding an A3xx I always noticed the unique "turboprop" like sound when close to full throttle. Why is that so?
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3 answers
571 views

How much oxygen is put in say a 180-seater A319 or A320 aircraft?

I read the answer in How much oxygen do commercial airliners carry? but it doesn't go into any details about two things: How much oxygen is carried? I do imagine it would be quite a bit. How much ...
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11 votes
1 answer
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Why does the flare mode of the A321neo engage 50 feet higher than the A321ceo?

Following is taken from the operating manual of A321neo: When passing 100 ft RA, the THS is frozen and the normal flight mode changes to flare mode as the aircraft descends to land. The flare mode is ...
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10 votes
1 answer
679 views

Why do we have to perform a full ADIRS alignment between latitudes of 2 degrees North and South on the A320 family?

In the latest FCOM revision under the preliminary cockpit preperation normal procedures chapter ADIRS alignment has been added. However most of the conditions remain the same except for a new line ...
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11 votes
1 answer
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How can the A320 receive 3 DME signals if it has only 2 DME receivers?

How can the A320 receive simultaneously 3 DME signals (VOR1 + VOR2 + ILS) if it has only 2 DME receivers (and antennas)? Does it multiplex them in some way? If yes, does it mean if one DME receiver ...
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4 votes
3 answers
285 views

How to determine the RPM of the rotating shaft of an A320 PTU?

The A320 PTU has an in-line variable displacement pump on one side and a bent-axis fixed displacement pump on the other connected directly by a shaft. what would be needed to know how fast the shaft ...
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2 votes
1 answer
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What are the various thrust modes in the Airbus A320?

I was going through A320 AFM and came across Thrust modes. I was not able to understand why thrust is in thrust mode during climb and descent because we climb or descent with a constant speed. So ...
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3 votes
2 answers
1k views

What is the difference between LP fuel valve and LP fuel shut off valve?

In the Airbus A320 FCOM in some places "LP fuel valve" is mentioned (in Fire and Fuel System chapters) whereas in the engine chapter "LP fuel Shut off valve" is mentioned. Is there ...
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What is a bowed rotor? [duplicate]

I was going through A320 FCOM and came across this term. Is bowed rotor bending if the spool due to unequal thermal cooling
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0 votes
1 answer
447 views

If the APU is switched off but the APU bleed is on, will the engine bleed valve close automatically?

On he A320 family aircraft, if the APU is switched off but the APU bleed is on, will the engine bleed valve closed by the Bleed Monitoring Computer (BMC)? This what I understood after going through ...
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1 vote
1 answer
375 views

What is the relation between N1 and Wing anti-ice

When wing anti-ice is selected, the N1 or EPR limit is automatically reduced, and the idle N1 or EPR is automatically increased. What does this statement mean ???
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7 votes
1 answer
4k views

Which category is A321-271NX in?

So I was wondering what is the Aircraft categories all about because from my previous questions answer I got to know about something called Cat D type aircraft so it made me curious to know what are ...
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5 votes
1 answer
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Why was NWS shifted from green hydraulic to yellow hydraulic system in the A320?

In older Airbus A320s, the NWS (nose wheel steering) was on the green hydraulic system and now it's on yellow. What's the reason for the change?
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33 votes
2 answers
6k views

Why does JetBlue have aircraft registered in Germany?

I recently saw a JetBlue A321 with a German flag on its tail and was wondering why it would be registered in Germany if it was a US-based carrier. I was thinking maybe it had something to do with ...
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Why is TOGA thrust 'never' 100% N1?

The title is voluntarily the opposite of this question: Why isn´t TOGA thrust always 100% N1 or N2?. I explain to you with an example: I'm looking to the FCOM of an A320 which states that the "...
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Why was blue hydraulic system chosen for RAT?

Q1. Why is blue hydraulic system chosen for RAT out of the three. Q2. If in case of hydraulic emmergency if I push RAT switch on Emer Elec pannel what will happen
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14 votes
2 answers
2k views

Why nitrogen generation system is only present in centre tank only?

I was going through FCOM of A320 and it mentioned that nitrogen generation system is only there for centre tank and not for wing tanks what is the reason for the same?
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10 votes
1 answer
316 views

Why the excessive wait after shutdown before using the manual starter valve on the PW1000G?

Why must there be a long period (measured in hours) between shutdown and startup, before using the manual engine start valve? Nine hours seems excessively long.
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2 votes
0 answers
364 views

What is the high pitched beep noise on A320s on startup?

Me and an engineer have been both breaking our heads over this, and no matter what we do we cannot figure this out. On certain A320 family aircraft, when the APU initializes/external power generator ...
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2 answers
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What is the difference between MMEL and MEL?

What was the need to introduced MEL if MMEL is there and is less restrictive than MEL ?
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3 votes
1 answer
303 views

Why is there a difference in the max spoilers extension between the A320 and A321 in a roll?

I was recently reading the Flight Controls chapter in the FCOM and I read that spoilers 2-5 extend a maximum of 35 degrees on the A320 however on the A321 spoilers 2,4 & 5 extend a max of 35 ...
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