The barking Airbus | PTU in A320

[@harosokman]

I greatly appreciate the more technical overview here. Thanks.

[@hugobloemers4425]

That is a great explanation. I remember the first time I heard this, I was fully expecting to be spending a night in the departure airport hotel. The sound reminded me very much when that was the case becasue a linear actuator of the flaps was broken. The barking dog synonym is very polite. I remember flying with a colleague and he asked: Why are all these A320s always wanking?". In any case, feature or not, though I am used to it now I still find it highly annoying.

[@allancopland1768]

The dog in the hold.... lol! I love the barking 320.

[@arb6591]

Thanks!

[@fightingfulcrum8108]

Thank you, Capt.

[@eliomarlacerda6943]

Thank you so much for this video captain, very informative. Your channel is great.

[@Avalaxy]

Ahhh. Last time I flew one, I thought there was a loud dog in the cargo area. I remember feeling so sorry for the scarred doggo.

[@TRPGpilot]

Thank you, well explained. You should come and fly in the Caribbean one day, Sint Maarten perhaps.

[@noranekonekomatagi3261]

Woof woof woof woof! Woof woof woof woof! Woof woof woof woof! Woof woof woof woof!

[@Flight.Companion]

Thank you Captain Magnar, I've always wonder about what was that barking dog sound too...

[@Colaholiker]

I have been on about 30 A320 family flights and I knew about the PTU, its reason to be there and its sound. But I have never heard it "bark" as much as in this video. Usually it's just one or two "barks" before pushback and when arriving at the gate. But maybe pilots here just don't do single-engine taxi and therefore there is less of a need to run the PTU. In general, I am a fan of "special sounds" that you hear on planes, even though a lot of them have mostly gone extinct now. Like the whining you heard on the PA of the MD-80 (pre MD-87 at least) when the ignitor caps charged during engine start (a high-pitch whine with increasing frequency that suddenly stopped and then came back at its original frequency to repeat the cycle), or the onmipresent 400Hz hum that you literally heard everywhere on a plane back in the day.

[@rynovoski]

A320 family is number one now, isn’t it?

[@gooner72]

I know the noisy PTU unnerves a lot of new Airbus passengers before they even get off the ground.

[@someonecalledray4231]

Magnar, could you make a video about the rejected takeoff procedures on the ATR? I often fly it in Flight Sim, and I haven’t been able to find anything about say - an engine fire before V1 with the ATR. Anyway, keep up the good work! Very interesting content :)

[@FlywithMagnar]

Great suggestion! Regardless of the reason for aborting the takeoff, you reduce power to ground idle, and use reverse and/or braking as required. If there's an emergency (engine fire or smoke, for example) you engage the parking brake, shut down the engines and apply the procedure for that emergency. In the case of an engine fire, you pull the fire handle and activate discharger no 1. If the fire persists after 30 seconds, you discharge no 2. If necessary, you evacuate the aircraft.

[@someonecalledray4231]

@@FlywithMagnarAh, Thanks! That information will definitely be useful in the future

[@Aviation101-g2p]

Hi Captain Manger, I would like for you to explain how you get thrust limit assumed temperature for Boeing Aircrafts for the climb out as they have flex temperature on the Airbus Aircrafts?

[@ultrametric9317]

Thanks but you didn't explain why it is so LOUD in Airbus aircraft!

[@brunogx7]

Good evening Capt. Magnar, I never saw any PTU on the B747 hydraulic systems. Are you sure of this information ?

[@FlywithMagnar]

I found the information on Quora where a mechanic wrote: "Boeing had them on the 727, and 747. On the 727 this was done because the number 2 engine didn’t have a hydraulic pump. On the 747 it was done so if you were taxing the aircraft with only two engines you would have all brakes and control."

[@brunogx7]

@@FlywithMagnar Boeing 747 has four hyd. systems with one EDP on each engine (dedicated to each sys. 1-2-3-4), one ADP on each engine (air driven pump 1-2-3-4) and one ACP (Alternative current pump) on engine 4. It is the configuration for the classic versions (-100-200-300). On the -400 it's almost the same except the ADP 2 and 3 are replaced by ACMP. On -8 there is one more ACMP on engine 1. So whatever the situation,all the hyd sys. are available even with 2 engines off. I don't know 727 or MD80. Always be careful with the informations collected on internet.