How the Boeing 737 hydraulic system works. (And what happens when it doesn't)

[@MentourPilot]

The first 100 who uses this link www.blinkist.com/mentourpilot will get One FREE week and 25% discount on Blinkist subscription!

[@ahmadtheaviationlover1937]

Mentour Pilot love your channel!! Your an awesome pilot I look up to you as an inspiration of a future pilot!

[@VladimirNicolici]

Mentour, I know you've been saying it like this for a long time, but it's "the first 100 who use", not "uses". 100 people can't be singular, so there is no "s" needed at the end of "use". And it seems to be the same in most other languages, the verb is used in the plural form when referring to a group of people. Other than that, a great video, a lot of interesting information, thanks for that!

[@zapfanzapfan]

This sounds like the thing to use when you are late on a book report and don't have the time to read it all :-) Happy Midsummer! Hope you got some sill och potatis.

[@thomashenden71]

Mentour Pilot It is quite fascinating that one is able to control a 737 with loss of hydraulics, by muscle power! 🙂

[@Bryan-Hensley]

@@VladimirNicolici you should get help. Someone who let's little tiny grammar mistakes bother them usually have a mental disorder. You should go get checked. You are suffering needlessly.

[@samanmahdiabadi]

As an AME who is working on 737 , I appreciate the way you explain it to people ! keep up the good work Peter !

[@MentourPilot]

Thank you! That’s always nice to hear from fellow aviators

[@samanmahdiabadi]

@@MentourPilot thank you too

[@user-qw4jy1oy9r]

Still does not change a thing :D I am never going to board 737 MAX, this rushed, low quality product. Same as majority who are interested in MAX sad story. I am from Europe, MAX is not going to be certified here so at least I will not have to stress what I am boarding. I assume you are aware that EASA and Canada gonna have their own independent recertification process. They already stated that MAX is undergoing substantial design changes (apart from software) if it wants a comeback. That would be a strange feeling anyway, being in the cabin, high up, going fast while having this uncertainty there might be some ladders, dirty rugs, heavy tools hidden somewhere, abandoned and forgotten next to you :)

[@samanmahdiabadi]

@@user-qw4jy1oy9r Still does not change a thing to me too ! It is my job and to be honest I don't care what normal people think of an aircraft they will never understand the beauty .... So ....

[@user-qw4jy1oy9r]

@@samanmahdiabadi, you rude and arrogant individual... Shame on you... Imagine how people who lost the loved ones in MAX crashes must feel after reading your post... No words..... You selfish despicable creature....

[@Hopeless_and_Forlorn]

Great explanation as usual, even though aileron power control units are located in main wheel well and nowhere near the ailerons. The 737-100 and early -200 series airplanes had near-disastrous hydraulic problems through the early 1970s. 'A' system was powered by engine pumps only, 'B' by electrics. Main problem was vibration of EDP pressure output lines between the engine disconnect and hydraulic power module in wheel well. Even though the lines were stainless steel, nylon cushions in the clamps securing the lines ate right through them and caused high pressure leaks that rapidly emptied 'A' reservoir. Resulted in loss of A system for flight controls but not B, total loss of landing gear and flap operating pressure. Gear could be deployed manually and flaps extended, slowly, by electric motor and standby hydraulics, but nose wheel steering was inoperative. Many emergency landings and runway retrievals resulted. Original, alternate thrust reverser system was based on accumulators rather than standby system and was likewise troublesome. By the time Boeing developed and we installed fixes for all those problems, we mechanics were thoroughly sick of being soaked in hydraulic fluid at work.

[@CatchSomeRaysWithAlisonMitch]

I have such a high commitment to become a pilot, i will definitely be getting a note book and a pen on this vid. Thanks captain 😃

[@cageordie]

Back in the late 50s Boeing's engineers were pretty ingenious. Most of them had a lot of experience dealing with WWII aircraft, so they made pretty rugged systems.

[@MentourPilot]

Indeed they did!

[@majortom4543]

Yeah, i remember someone said, use thicker metal on the parts of the planes that arent damaged. and they asked him "why dont we strenghen the parts where the planes have all the bullet holes?" To which he replied, because these are the planes that made it back with all this damage. The ones that didnt were hit in spots that took them down.

[@righteousindecision2778]

@@majortom4543 *Does some googling* : Abraham Wald seems to be the guy you mean - a mathematician who died in 1950. I thought he was British, but he was Austrain-American actually. America was his sanctuary from the Nazis. He doesn't seem to have worked for Boeing, but apparently his son was a physicist.

[@ketoninja]

OMG that poodle on the left really hamming it up around @20:45 it's like s/he knows they are on camera! So adorable!

[@나비방탄소년단]

whos here learning about hydraulic systems after what happened to jeju air

[@kato223]

Why would anyone down vote your awesome and super informative videos here? Your videos make me remember why I am never afraid when I fly! Thank you Mentour Pilot for always providing great content!

[@KlemensD]

My finger when mentour pilot uploads a new video: I am speed

[@MentourPilot]

Haha! Excellent! I wish more people did like you!

[@ahmadtheaviationlover1937]

Mentour Pilot as soon as you upload a video based on aviation I react immediately. I go into 5th gear speed 😂😂

[@coca-colayes1958]

I try save it till I have no one to disturb me and set myself up with a coffee

[@PilotBlogDenys]

Love your tech videos. Very good for those who are going through B737 type rating course 🤘.

[@PilotBlogDenys]

@787 Wing Aviation Yes. And if you lose A or B the Autoland is also impossible...

[@737MaxPilot]

Pilot Blog true, but what airline allows them to use auto land?

[@tomstravels520]

B37xM Flyer isn’t it meant to be a requirement every so often to keep pilots current. They seen videos they do it on a clear day to make sure it works and they are current incase they need it for real

[@PilotBlogDenys]

@@737MaxPilot we use Autoland. At least once per month or for foggy weather...

[@PilotBlogDenys]

@@tomstravels520 True and every 6 month we have low visibility operations training... Well at least in my airline 😉.

[@MrAviationFan]

I would like to slightly correct you. Cables go through the whole aircraft, and in B737NG you actually move the cables, which than activate actuators(most of them in the wheel well , some are in the tail). I guess people think it is either hydraulics or cables on B737NG, when it is actually both in normal situation. I know that you know that as a pilot and instructor, but it might not be clear to other viewers(some of them who do not have technical background). Other than that, perfect explanation of quite complicated system. When talking to mechanics, they told me that spoiler mixer is the thing they hate on the NG due to complexity. Also, removing some actuators(for example aileron PCU) and installing them is a nightmare(due to cable rigging), unlike on A320 where it takes 20 minutes in base maintenance.

[@alnett22]

I've driven a heavy truck before with no power steering, once before I remember trying to park in a tight spot and I felt my arms were going to fall off from the pain of struggling with steering wheel. I can't even imagine how would feel to steer a plane using muscle Force.

[@737MaxPilot]

alnett22 its nothing that drastic.

[@theyaduvanshiindian391]

@@737MaxPilot yes it is see UA 232

[@737MaxPilot]

@@theyaduvanshiindian391 that is not a 737. I fly the 737 on a fairly regular basis with the hydraulic assistance shut off. It is nothing like what he is talking about...then again, I am sure a 11 year old little girl would disagree with me also.

[@rajagopalvenkat5462]

Been watching this channel for well over a year. Only today, I noticed the red and green throw pillows - positioned as port and starboard. Subtle, but neat!

[@JoëlDobler]

Even if im a testcell operator for the CFM56-7B i learned a lot during this video.. thank you alot peter

[@MTFBOEING737NG]

The electric motor driven pumps are cooled by Hydraulic fluid? Yes, you're right as the hydraulic fluid passes through a HEAT EXCHANGER Located in each main fuel tank.That's why we need a certain quantity of fuel in the main tanks before turning ON the electric motor driven pumps (minimum of 1675 Lbs ). As always, your explanations are great. Both A and B hydraulic systems have an engine-driven pump and an AC electric motor-driven pump. The system A engine-driven pump is powered by the No. 1 engine and the system B engine-driven pump is powered by the No. 2 engine. An engine-driven hydraulic pump supplies approximately 6 times the fluid volume of the related electric motor-driven hydraulic pump.

[@dougchinn2820]

Great explanation of the hydraulic system. Love hearing about the technical aspects of flying. Considering the thickness of the manual, and accompanying checklists, I would feel confident knowing that the pilots have it memorized, and can execute it automatically without going through the checklist. The buttons, switch, which should be on, which should be off, AND when, is mind blowing. I'm reminded, that even though people know how to drive, it doesn't mean they know how a car operates. Thanks for the great job that you're doing. Stay safe.

[@tuganbolatl2932]

As an 737 Captain i like your all of your videos...

[@MentourPilot]

So happy to hear that!

[@ukasz-xl8ss]

One thing Peter, 18:17 actually the leading edge devices will be in fully extended positions once you select switch in ‚down’ position (regardless of trailing edge flaps positions). Thank you so much for another, fantastic technicial movie! Greetings

[@MentourPilot]

Absolutely correct. My mistake

[@Hopeless_and_Forlorn]

Must also place alternate flap switch in ARM position.

[@Suhhhhhhhhhhhhduuuuuuude]

Got my first airline job here in the states with a legacy carrier, and going through 737 initial right now, your entire series about the systems of the 737 are great! thanks for making these, helped me understand the systems much better than just reading them out of the manuals. Thanks Pete!

[@maxgyvero]

Patxi & Molly are definitely overwhelmed.

[@gamlemann53]

I feel much safer on an a 737 after I saw this video! Thank's Peter. I had a landing in Trondheim when they coulden't get the flaps down, and we stopped on the runway and used the emergensy glides off the plane. That was an old DC9 or a Carawellwelle plane from SAS. The engines almoust fell off when we landed very hard, but the pilotes saved us. No one was heart. We had to wait a long time to get a new plane from Oslo to take us to our destination Alta.

[@speedbird9313]

Skriver på norsk jeg, siden du er det😉 Det var vel ikke tilfeldigvis 23.feb 1987?? 🤭🤔

[@antonbrams_io]

small advice : It would be nice to see a pointer on complex illustrations. It should point exactly on the subject, that you are describing at the moment. It's easier for novices to know, where to look at :)

[@yoidoretennshi777]

Thank you Peter for the explanation of the connection between engine failure and autopilot system. That is exactly what I wanted to know!

[@ooo_Kim_Chi_ooo]

Great video! I recently just rode second seat in Mustang and the hydraulics are amazing! I know people love FBW but there is something tactile and fun about planes using cabled hydraulics.

[@Keratsss]

0:17 Look at the left dog when Mentour say stay tune XDDD

[@MentourPilot]

Yeah, they are a funny bunch!

[@DrunkHog]

Thanks very much for the vid, Peter! Just a suggestion, but I think Hilighting the elements of the system as you were mentioning each of them would've helped a lot.

[@AdrianLongoria1]

This video helped me pass a test for ADX! Thank you!

[@caleb0606]

This was one of the best videos He has produced of all time!

[@douggale5962]

That first officer we see in several episodes looks like a solid pilot, looks like a really smart guy. Is there an episode that goes into detail about him?

[@sebastianlabusch465]

Starting to watch this video at 7:37 am

[@MentourPilot]

Good stuff! Way to commit!

[@Hondalover3000]

Wonderful presentation of a technical system. Next technical video featuring mechanisms during rotation. Thanks Mentour.

[@hugodrenth4041]

I love the new animations of the switches in the cockpit. Great video as always :)

[@victortitov1740]

yet I don't. It would be nice to have animations that highlight the thing being mentioned instead.

[@sergegostoli9524]

The irony of listening in 15 minutes to a book called "the things you can only see when you slow down" .... :-)

[@swedishtryharder6546]

Nice video Petter!, your channel has inspired me to become a aircraft maintenence technician

[@speedbird9313]

Not the best of times, but good luck🤭

[@MentourPilot]

That’s really nice to hear!

[@mateuszmista738]

Hi! I am new on this channel. I just want to say thank you, you have a lot of great content here, all explained in an easy way. So a lot of watching ahead for me:) I hope you are doing well!

[@jaydasg6]

Like the way it is simplified. Always wondered what happens if the hydraulic system fails? The standy backup is now clear to me.

[@dafff08]

even for a flight simmer this is gold.

[@MentourPilot]

Glad you liked it!

[@ecclestonsangel]

Great video, Petter! My father, a retired Naval AMHC, he designed the hydraulics system for your 737s. Cool, huh? PS: Patxi looks like a zombie, lol!

[@burakarpacioglu187]

Thank you very much for sharing of your experience and know-how for career beginners such as me. I would like to make one small correction about the flow rate (volume) compression between engine driven and electric pump. According to FCOM 737NG, the rate is 6 times bigger for engine driven pump.

[@MTFBOEING737NG]

In our airline, we always switch off the electric hydraulic pumps after shutdown, even during short turnarounds. We only turn the pumps on if there is a strong tailwind to maintain the elevator in its neutral position.

[@safinsebastin9103]

Good graphics Mentour, thank you for the explanation.

[@jasongilmour379]

Great video, a good refreshment from what I studied in my Atpls.

[@user-qf6yt3id3w]

Those dogs look so relaxed,

[@maailman_mies]

Really awesome infographics. The topic is complex and interesting. I like the way you clarify difficult things.

[@dingsens2810]

Hi, I always watch your videos with great interest, because this type of yt channel is very rare (high quality airplane talk). and as always this video is no exception from that. I just wanted to give a small feedback on those new animations that you were using. in my opinion it would be better to either speed them up dramatically, or not use them. it felt hard to focus on what you were saying and analyze the picture being builded in front of me, I mean it was hard to orient myself as it took time for all information to be displayed, and so my brain had to iterate multiple times over all lables to understand what I am seeing there. the drawings themself are awesome though

[@MentourPilot]

Point taken

[@dingsens2810]

@@MentourPilot I am happy to hear that!

[@albertoaloyperez9724]

That graphics are so cool! Great Job 😍😍

[@PhilippusCesena]

Congratulations. It is a great explaination and also the animation is amazing

[@NuhadMannan]

Thank you Peter! Explanation was very clear regarding the hydraulic system!

[@tinotendamandizvidza1903]

Is it possible for the 737 to lose all hydraulics like the DC10 which had to make a emergency landing at Salt lake city

[@MentourPilot]

Anything is possible but highly unlikely

[@tomstravels520]

Possible yes. Has it happened...no. Except the 737 is still controllable without hydraulics

[@roichir7699]

Not in the same way. But it is possible but very unlikely.

[@electric7487]

That's extremely improbable with any airplane if maintained properly. Is it possible? Yes, but only if it is poorly maintained or if someone screwed up badly.

[@dominicMcAfee]

Excellent video Petter! Loved it!

[@Keratsss]

probably my best teacher

[@MentourPilot]

Thank you! I’m so happy that you like it!

[@jossy573]

Hope to see you in the skies again. Cant wait for your first Vlog after you start flying again. Great Content and explanations. 🤛

[@airfoxtrot2006]

Great video Mentour I enjoyed it, have a good weekend my friend

[@Samuel-ge7im]

Great detailed explanation video Peter!

[@efotfilmwilliamostman6681]

What procedures do you do if you for example lose system A mid flight? Do you divert and land as soon as possible, just to be sure, or do you complete the flight and deal with the problems on the ground?

[@tomstravels520]

Probably land as you have lost one of your redundancies but could depend on if you’re flying back to your main operations base and only 200 miles from it. You still have 2 systems spare

[@MentourPilot]

You can complete the flight in most conditions.

[@stevewausa]

Totally love geeking out on these vids

[@mungo24601]

The dog waited for the right moment.

[@MentourPilot]

Indeed! He is well trained

[@umuraytekin4747]

Super duper thanks for your efforts sir, highly appreciated as always!

[@steewith2ees14]

As much as I love Petter and this amazing channel (arguably one of the best on the Tube) I am finding it more difficult to watch his material of late due to my yearning for air travel, something I have not managed to engage in for nearly 6 years due to chronic health reasons even before the shutdown (as a 41 year old I have been using commercial aviation since 1982) - as awful as the airport experience has become post 9/11 it is still a means to an end and I still tend to love the actual flights themselves.

[@MentourPilot]

I’m so sorry to hear that. 😔

[@steewith2ees14]

@@MentourPilot I am extremely grateful that you took the time to respond and rest assured, regardless of my current level of self misery the channel has brought me so much more joy than frustration and indeed has been the closest I have been able to get to the experience in recent years. I just hope the industry can recover from such uncertain times and that both you and all of your fantastic colleagues continue to have the opportunity to provide us all with the privilege of being able to access so much of this wonderful world. Even if I never fly again, I am lucky to have had the experience as a regular part of my life for so long as their are so many people much more worse off that they have not and may never get a chance to fly in the first place.

[@amirz1321]

Are you required to practice hydraulic failure scenarios in the simulator

[@tonymcflattie2450]

Yes

[@russellrattys6581]

Question about manual gear release, do the modern 737's still have the peep hole in the pasenger cabin floor, where the pilots can look down and check to make sure the gear is locked with the red stripes lining up?

[@speedbird9313]

No peep hole on the 737NG👀 Dont think the classic had one either..

[@MentourPilot]

No, unfortunately we don’t

[@stumo8681]

@@speedbird9313 classic does have window/mirror system

[@russellrattys6581]

I worked at a breakers yard a while ago, and a klm 737 came in, i think it was a 400, and that had little circles of carpet you could lift up above the gear bay in the passenger cabin, there was a glass sight, you literally put your eye against it, and looked at mirrors through the glass sights that were in the gear bay, those mirrors showed you the gear leg, where red stipes were painted onto a joint on the gear leg, so, should a gear indicator fail, you could double check, there was the same spy hole in the cockpit too, under where someones feet would be if they were sat in the fold down jump seat, just aft of the radio pedestal 👍 See, even as a pilot, you learn something new every day 😁

[@stumo8681]

NG and max don't have a window. They have a redundant set of gear down sensors and a separate second set of indication annunciators on the overhead panel

[@juliettoler4123]

Great program! Very interesting!

[@MentourPilot]

Glad you looked it!!

[@jeffhoser7717]

From the schematic shown, I presumed Boeing is using a closed center system and compensated pumps but your comment regarding volume/flow rate variance twixt the motor-driven and engine driven pumps makes me wonder . IAC, it wouold seem there's a great deal of control complexity introduced by having redundant control activation systems . Of course pilots don't need in-depth knowledge of the design features/philosophy in order to operate the systems and compensate for failures b ut I'm sure even the required level are considerable ! Great show series !

[@tommydelgado2594]

Pillow lights accurate 😁 Great video

[@benspouse9840]

This was great. Thanks, would love to see some scenarios demonstrated in X-Plane.

[@MentourPilot]

I will be doming full failure management videos in a real sim when this whole Pandemic is over. Glad you liked it

[@Chris42344234]

Awesome video. Perfect Type Rating preparation :)

[@srikantmishramusic2389]

Yesss You didn't say Joyk .. 😁 hahaha just kidding Awesome video ♥️♥️♥️

[@MentourPilot]

Hahaha, thanks!

[@officialmani2560]

I love these videos on aviation thanks mentour👌🏾👍🏼

[@enl1305]

Hi, Peter, I got a question: why the damper light did not illuminated when loss of system B? what is the purpose it designed like that?

[@speedbird9313]

Time stamp?🤔

[@theaviatoribo3570]

Thank u mentour for these amazing and helpful infos, since i am suffering with my ATPL studies. 😔

[@amirkhan-jn5gi]

AFTER T/o with Flaps 5 Loss of Hyd sys B & Stanby Hyd sys . Will u be able to retract Trailing edge flaps and Slats ?

[@rvasic]

Great video, keep it coming!

[@ollivud63]

Your videos are very informative.. awesome! thanks

[@MentourPilot]

Thank YOU for watching them! Feel free to help the channel by sharing them around!

[@ChrisTong-vr1qq]

Thx for the podcast of how the hydraulics work on all Boeing 737s

[@klam77]

FANTASTIC descriptions!

[@speedbird9313]

6:20 Really? Noisy for your ground handling crew😳, at my airline flight crew always turn the electical hyd pumps off during turn-around🙃

[@bioqrafik]

hello. did you see the crash of azal today? can the failed hydraulic system due to leakage be a reason? it is suspected to be a drone attack

[@daowei4211]

Great video, but for some of us [ME, myself & I], not having a pointer to show exactly what part of the system you are refering to is difficult. Again, I love your videos, however, this was the only one I had trouble following. Yours Truly, Closet Aeronautical. Hehe!

[@yatinawaal6682]

If you lost EDP no.2 on takeoff, how would you retract flaps & slats? Using the electric pump? And If you had a leak on takeoff & lost the hydraulic fluid from no.2 system, in this case how would retract flaps (both leading & trailing edge) & slats? I mean the Alternate electric system could put the Trailing edge flaps up, but it doesn't work on the leading devices, does it?

[@dannydaw59]

The Airbus A320 uses fly by wire correct? What do they do when both hydraulic systems are lost? Can't use cables.

[@tomstravels520]

Airbus A320 has 3 hydraulic systems. You’d have to loose fluid in all 3 systems to be paralysed but that would be the same in any other aircraft except those with cables. Even if the 2 engine driven pumps (yellow and green system) fail the yellow system has an electric pump and the PTU can the pressurise the green system and the blue system has the RAT but the entire aircraft can be flown with just one system working The A330/A340 also have 3 systems but the A350/A380 have 2 but some control surfaces using Elecrro Hydrostatic Actuators which can still operate even if the main supply leaks all fluid out.

[@dannydaw59]

@@tomstravels520 Cool. Thanks for explaining.

[@EveryTipeOfVideo]

#AbsolutelyFantastic Video! Thanks for the shoutout 😃!

[@MentourPilot]

Glad you liked it!! Thanks for your help!

[@danielepelaia7875]

If you loose hydraulic pressure I assume no flight controls are useable,o just minimum control.this is my opinion I didn't fly big jets with their complicated systems only gliders and single engine airplanes while I was in the air cadets.pleas correct me if I'm wrong this applies to any more qualified than me.

[@speedbird9313]

Daniele Pelaia 18:55

[@johnfitzpatrick2469]

Hi Petter, do the control cables move while the authority hydraulic system A and B is in use.🔦🔎

[@joshephand5538]

The steering wheel connected to the ailerons by steel cables some how it will move when you turn it, Maybe the actuators without hydraulic pressure will also move with it

[@joshephand5538]

Yes the control cable will move when you move the steering wheel

[@andrewsnow7386]

It's much like the power steering in your car. The steering wheel in your car is connected to the front wheels of your car by mechanical components. Even if the power steering quits on your car, you can still steer. On the 737, the cables are part of the mechanical connection between the pilots controls and the primary flight control surfaces. If one moves, the other moves too. The hydraulic system provides "power steering".

[@SKARTHIKSELVAN]

Thanks for putting efforts in making these videos.

[@TheMeniru]

Just a very minor question, I believe the engine driven pump supplies 6 times the fluid quantity, not 4 times? 7:28

[@speedbird9313]

Sounds accurate🤔 The EMDPs is rated at 5.7 gpm (gallons per minute) at 2700 psi, while the EDPs are rated at 36 gpm at 3000 psi👍🏻

[@trumpetdude2115]

Gosh I swear I can just get a pilots license just by watching this man

[@aerocowboy]

Great Video! Question- When there is a loss of either A or B, and the Standby System is activated by selecting Standby Rudder, is the rudder powered by only the Standby System or jointly with the Standby System and the remaining A or B system?

[@seanmcerlean]

Great video Petter.👍

[@hubermarcelo4273]

Thanks for this amazing explanation of the hydraulics system!! Can you make a video about the electrical systems on the 737 as well?

[@2011mendo]

FYI, there is a RAT on the 57. It's not just a Fifi(Airbus) deal...

[@billrimmer5596]

Great videos always!! Have u ever had an engine failure on takeoff? Or landing? Thank u!!

[@MentourPilot]

No, not in the real thing. They are very reliable

[@AdventureswithaaronB]

It’s interesting, thank you for sharing

[@alejandroaltuna9421]

Excelent Please overview electrical system Thanks

[@claudioaugustocorreaecastr8186]

Really good content and explanation!

[@Jordan-tj5lg]

Great Video Mentour 😁

[@MentourPilot]

Thank you! The channel needs some help right now so feel free to share it around.

[@MrPomelo555]

New sponsor!!!! New Porsche coming up!!! 😛

[@MrPomelo555]

Should I rather use Audible though? 🤔 😆

[@pinksheep406]

Could you do a video on Japan Airlines 123, and what happens when a plane looses all hydraulics with no way of restoring it? I have read about JAL 123 but it intrigues me how the pilots kept the plane flying for 30+ minutes against all odds.

[@rcom9880]

Petter, what about doing a video on the minimum systems needed in emergency to fly & land. Loss of hydraulics, glass cockpit displays, etc?

[@chrisruiz9017]

The concept of a plane is amazing

[@kenlesurvivant6403]

Hi m’entoure really your videos are very helpful so 😊