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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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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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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Why does the flare mode of the A321neo engage 50 feet higher than the A321ceo?

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 essentially a direct stick-to-elevator law without auto ...
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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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1answer
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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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2answers
139 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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1answer
120 views

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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415 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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1answer
108 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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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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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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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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Why is there no anti ice system on inboard slats of A320 [duplicate]

I was going through FCOM of A320 and it was mentioned that there is no anti ice system for inboard slats.
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2answers
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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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1answer
159 views

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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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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1answer
224 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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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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110 views

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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94 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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What is the difference between boomset and headset?

Both "boomset" and "headset" are terms used e.g. by Airbus: The audio management system includes: [...] sockets at each station headset jack and boomset connector (hand ...
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1answer
168 views

How often is the cabin air replaced in A320?

One of the A320 pilots told me that there is an icao rule that air should be replaced every 90 seconds? Is this true ? can someone give me a supporting article for the same
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Why is there an altitude limitation on operating the slats/flaps on the A320?

As per the FCOM limitations chapter there is an altitude limitation of 20000 feet for operating the flaps/slats on the A320? Why this specific altitude?
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What are the amber triangles on the ECAM bleed page on an A320?

In FCOM they say that triangle becomes amber when RAM AIR flap is not fully open, and both pack flow control valves are closed. Here the RAM air flap is emergency ram air or RAM Air flap for the Packs?...
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What does pneumatic operated and electrically controlled means? [duplicate]

I was going through A 320 FCOM and didn't understand this term
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Why doesn’t the A320 have any provision for manual aileron trim?

To eliminate the need for pilots (human or automatic) to maintain continuous force on their aircrafts’ yoke/joystick and rudder pedals while flying, aircraft generally have some sort of trim mechanism ...
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What exactly do “attempt” and “cycle” mean in these starter duty limitations?

Can someone please explain me this A320 Starter Duty Limitation in simple terms? E.g. for the CFM56 Starter: No running engagement when N2>20% 4 cycles of max 2 mins Pause between start attempts . ...
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How do the A320 flight controls reconfiguration laws work?

Can someone explain in simple terms the reconfiguration laws? I have hard time understanding ELAC, SEC, FAC Priorities in FCTL Architecture Diagram.
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What is the fuel consumption per mile for a full CEO A320?

I’m writing an essay as part of my GCSE HPQ and one of the statistics I need to base my research and answer on is the fuel consumption per mile or kilometre for a CEO A320. It doesn’t have to take ...
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Why is the battery turned off for checking the voltage on the A320?

Preliminary cockpit preparation section requires BAT check for 25.5V with BAT off (The beginning step). Since BAT indicator always show respective voltage, why they must be switched off?
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Why doesn’t the A320 family suffer from the same design constraints regarding engine placement/landing gear length as the Boeing 737 family?

This answer gives a pretty good description about the design issues which lead to the problems of the Boeing 737 Max (basically the same as in a video I watched a while ago): The landing gear of the ...
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Could you start both A320 engines with APU BLEED on?

I've seen some procedures where one engine is started with APU bleed, then APU Bleed is turned off to avoid ingestion of non-desired gases and then the second engine is started with ENG 1 Bleed on. ...
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What will happen on Airbus A320-200 series when during push back NW STRG DISC in not in the towing position?

During pushback what might happen if the NW STRG DISC is not indicated green on ECAM? Will I have an ECAM warning? What would be the worst case scenario that might happen?
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What is this turbine engine panel that opens on landing?

Tonight I flew from Munich to Dortmund on an A319 and I happened to sit just above the wings and turbine on the right side. Upon landing, the turbine opened a window or panel which exposed some grid ...
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1answer
101 views

What does the ACARS Weight and Balance Request page look like?

In the ATSU AOC Preflight menu of an Airbus (maybe Boeing too), there is an option for a weight and balance request. The selection name varies by airline but it may say "W/B Req" "Send ...
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183 views

How is an A320 on the ground kept cool inside if the APU fails?

What happens to the air conditioner when the APU is not available due to damage or it just fails? Also adding that the airport does not have an air conditioning unit. Since it is above average sea ...
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1answer
201 views

How should I read these abbreviations on the Airbus 320 MCDU?

Often I have seen some abbreviations on the Airbus MCDU such as CI, CF, etc. They are explained in this question: What do the different types of approach abbreviations used on the A320 MCDU exactly ...
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What pitch attitudes are common during an emergency descent for an airliner?

What pitch attitudes are common during an emergency descent? I assume it would be a fairly nose-down attitude, but I can't imagine how steep would feel to the passengers. Suppose a gradual ...
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1answer
2k views

At what point can Approach mode be engaged in an A320?

In my experience using Flightgear and other computer simulators, when flying an ILS approach on an A320, the approach mode can only be engaged at a certain point or later. What is this point, and why ...
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1answer
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What are these Lights on the Center Column between Cockpit Windows on the A320?

I have always noticed there is what appears to be three lights on the center column, which separates the pilot and copilot window of the Airbus A320 family. From the looks, the center light is red and ...
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Why is the NAV ADR 1 ECAM caution a NO GO as per the MEL on the A320?

There isn't much more I can post about the question but in the MEL out of the 3 ADRs if ADR 1 fails on ground the MEL doesn't allow for a dispatch.
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How much thrust is produced on an A320 at takeoff and during cruise?

Where can you get the drag polar of the A320 at cruise and TakeOff?
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What is the ground idle fuel flow of an A320 (CFM or IAE or neo)?

Standing on ground, what is the idle fuel flow of an A320? ISA conditions, both engines running?
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246 views

What do the different types of approach abbreviations used on the A320 MCDU exactly mean?

On the MCDU I have noticed after setting up the approach there are a number of different codes which appear next to the runway designator these are namely as below: CI CF FI CD FD Can someone kindly ...
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1answer
385 views

Can Airbus A320 doors be opened mid-flight?

Today I learned how airliner doors are typically an outward facing plug and cabin pressure would make them nearly impossible to open mid-flight. It's easy enough to see that for the shape of Boeing ...
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387 views

What is the angle of Incidence of wing of Airbus A320?

What is the Angle of Incidence/ Mounting Angle of the wing of AIRBUS A320?
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Why does the A320 still have this old fashioned nose?

Another answer stated that Airbus was less focused on just brand image, and more on aerodynamics, explaining the more rounded nose of it's 320 vs the 737's. But it still has flat cockpit panes which ...
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4k views

What does “running torque” mean?

I would like to know the meaning of the phrase and especially the meaning of "running torque": Torque the inner plug to between 75 and 85lbf.in. Loosen half a turn and RETORQUE to between 15 and ...

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