CFM LEAP 1A break down

[@I7470]

Please do elaborate videos to explain it all properly. Don't worry about videos being too long. We are happy to learn. Thanks a lot.

[@StigAviation]

I will try my best

[@RobtheAviator]

You are doing a great job

[@nolanono2532]

@@StigAviation Yess if you have the time I would love a long form video

[@sprinklersolutions11]

Absolutely love your videos! Keep them coming please!! Awesome job!

[@StigAviation]

More to come!

[@AvStevieStevenJamesDrums]

I so look forward to your posts. Being an AvGeek for nearly 50 years, you show us jealous folks the internals that most people don’t get to see. Thank you so much. My parents worked for the airline 70’s thru mid 90’s. I was 6 for my very first plane ride in a 707. Cheers

[@StigAviation]

Right on! keep the aviation love alive my friend its a beautiful feeling

[@s0nnyburnett]

Love this, quick, simple and concise explanations.

[@StigAviation]

Glad you like it!

[@Cjmatthews87]

Never worry about your videos being to long its impossible your content is in my eyes perfect for the circumstances with you being on the clock keep up your Fantastic content sir 👍

[@StigAviation]

Awesome! Thank you!

[@MDSsp251]

Not too long that your videos would be used as training material. Very impressive!

[@StigAviation]

Wow, thanks! That's incredibly kind of you

[@JAMESWUERTELE]

This is fantastic! I run a CF6 derivative on the ground for power generation. Keep making videos!

[@StigAviation]

CF6 Is a workhorse for sure. Thank you 👍

[@DaltonFTT]

I have a job interview coming up with GE, hopefully I’ll be building these soon 🤞

[@StigAviation]

Hope you get the job you'll be building what i fix Awesome

[@voytekcyvr1936]

I could listen for hours. Thanks to you we can see the technology which get us flying and flying safe. Thanks for all your content!!

[@StigAviation]

Thank you for being here and enjoying it. I appreciate you

[@RTD1947]

outstanding Knowledge...very impressive

[@StigAviation]

So nice of you. Thank you for watching

[@kraz904]

Truly a modern day masterpiece. It’s also great to look at or work on a brand new engine versus a high time one. So clean you can eat off it…

[@StigAviation]

It’s definitely a pleasure to work on newer engines, makes life a lot easier. These are very beautifully designed.

[@biggdogg285]

Excellent, thumbs up as always.

[@StigAviation]

Thank you! Cheers!

[@Defcon666]

So many cool things ..I'm ready to start taking things apart.

[@StigAviation]

Lets go !!!

[@chrisnicholls8636]

Always like CFM engines since the CFM 56 appeared on the 737-300. Great video Stig makes me wished id gone into Aircraft engineering here in the UK

[@StigAviation]

CFM makes an amazing product , i enjoy it very much

[@NovejSpeed3]

Can you please explain why the LEAPs on thr MAX need so long to start while the NEOs don't. I understand about the bowed shafts and thermal expansion I just don't understand why one has the problem and the other doesn't. Great video!!! Loved the test run at the end!!!

[@StigAviation]

Good question! and you kind of answered it yourself, the shaft bowing is the reason, the LEAP 1B has a bit of different configuration when it comes to the Compressor staging. Both engine do take a while ( especially on the first start of the day)

[@21lt]

That was awesome! It was the most comprehensive jet engine video I’ve ever seen. Keep the videos coming 🤟

[@StigAviation]

Thank you very much. I’m glad you enjoyed it

[@МайорБабакин]

Спасибо Вам за вашу работу и за ведение канала на Ютьюб🤝! Мне, как любителю авиатехники (особенно авиадвигателей) - очень познавательно и интересно 👍!

[@StigAviation]

Thank you so much for being here and watching

[@МайорБабакин]

@@StigAviation Спасибо, Стиг🤝! Я - Ваш подписчик, поэтому слежу за Вами и за вашей работой, которую Вы снимаете для своего канала и соответственно за работой - которую Вы делаете, при обслуживании самого прекрасного, что смогли сделать ум и руки человека: самолётов 👍! Надеюсь, что гугл-переводчик - сможет перевести мои самые тёплые пожелания с русского на английский. 😁

[@man_from_dreams]

​@@МайорБабакинТоже интересен этот канал👍🏻 Привет из России)

[@mzrzfxr]

Great stuff, more please! I could dork on this for a while!

[@StigAviation]

Enjoy. Got lots of videos

[@kabel74]

Jet engine ... as a complete system always fascinate me. Its amazing how the mechanical, electronics/electrical, pneumatic hydraulic, fuel, oils, sensors etc2 work together to make it functions. Thanks for your very enthusiastic introduction video 🙂 #largeFANsmallCORE #AVGeek

[@StigAviation]

That are amazing machines. Thank you for watching

[@martinross5521]

Great video, Stig - your knowledge is amazing and love your style for passing it on.

[@StigAviation]

My pleasure! and thank you for being here.

[@joseray100]

Wow, I didn’t realize how incredible that is so many many parts of a jet engine that explains why jet engines are very extremely extremely complicated system, especially all the parts it’s incredibly amazing machine

[@StigAviation]

It’s just incredible engineering

[@ricardocorbie6803]

Until I found u, I had a preference for Boeing aircraft,, but now I find ,, because of your knowledge and expertise I prefer Airbus,, seems as if they put many more options onto their products,, like those brake cooling fans!! Thanks Sir!! Love your content!!❤️

[@StigAviation]

It’s definitely a different architecture when it comes to Airbus, a lot more mechanics friendly and user-friendly. But I enjoy working on both manufacturers.

[@hugostiglitz47]

Your videos are fantastic. Love your content!

[@StigAviation]

Thanks so much!

[@XFlight69]

Huge fan of your channel man have really learned a lot from you. Would you be able to do any videos on the maintenance pages in the A320 series MCDU ?

[@StigAviation]

i will work on that and get something out for you

[@kylegordon]

Fascinating stuff. The tip clearance control, what range of circumference expansion is the engine having to deal with? mm? a cm or two?

[@StigAviation]

MM very tight tolerances

[@MrFalconp1]

I think my brain just P.O.P.P.E.D.... Another great one Sig

[@StigAviation]

It’s a lot of information.. but it’s very interesting stuff. Thank you

[@miajoe4259]

Try landscape mode on videos, great info from an retired aa mia cargo empolyee

[@StigAviation]

Will do, at the moment I'm just doing video from my phone so its hard to transition , im catering more to the mobile user. i need to get a go pro

[@SSaugaCriss]

I prefer this format as it presents almost full screen on YT mobile.

[@BigEightiesNewWave]

The best of France and America married to produce best engine. Safran+GE

[@StigAviation]

+CFM 👌. I agree. A very good combination

[@ChapaLipar]

Because their business model is based on the sharing of the revenues, but not sharing the costs. Its a classic example shown in some business schools

[@completemoney]

Ahhhhh so the ppc is connected to the rgb and has a sister component tcb that’s on top of the rotc bda that gives fuel to the jpm while giving the fdt power. Makes sense now. Jk absolutely love all of your videos. They’ve answered a ton of curious questions I’ve always wondered about. Please keep up these great videos and spewing knowledge. 99% of KZbin videos are brain eating junk. Your the 1% that actually contributes to society.

[@StigAviation]

Thank you Very much, i appreciate you being here

[@andrescastaneda8833]

💪 Thanks Stig!!!

[@StigAviation]

My pleasure 👍

[@pmbuthia4210]

Thanks for another informative video. Nice to see the highly praised CMF Lp1. I have a kinda stupid question. When a pilot decides to dump fuel. Is it via the wings or the engine have a release valve?😅😅😅😅

[@StigAviation]

Good question! It depends on the aircraft, some aircraft dont have the capability do Jettison fuel ( A321 cant) But for example the 777 can dump fuel , it will be selected from the flight deck on how much to dump and the fuel will drain from the wing tips jettison tubes.

[@ginolatino91]

Wonderful and very explicative... Thank you!! Greetings from Roma

[@StigAviation]

Glad you enjoyed it! Greetings from LAX

[@mrsim9095]

Good stuff! Also AME here, doing heavy on A220

[@StigAviation]

Nice! but i feel bad for you and the PW issues

[@mrsim9095]

@@StigAviation Dont feel bad for me, Im not paying! With all the issues my job is safe 😅 But ya, the pw issues is not fun, we had to park few planes out of c check to give engines to the line

[@SSaugaCriss]

what are the issues if not confidential ? the only issue I know of with the 220 is they do not depart in moderate turbulence although that may not be engine related.

[@adolforuiz3723]

Excelente Master clas 🎉

[@StigAviation]

thank you

[@jeffnew1213]

Very well done video. Fascinating engine. Question: Can the fan on an engine at standstill be prevented from rotating if the fan was held in place by hand?

[@StigAviation]

in theory Yes it can, because it gathers momentum to spin up, but i have never done that

[@ChapaLipar]

Not sure to understand the question, but if it does not turn, yes you can hold it by hand when the wind starts to blow. But when rotating, don’t even think about it. The mass of the rotor is important and you may end up with missing fingers or broken fist if you do so. By the way, these fan blades have a titanium leading edge but no titanium trailing edge. No need. They are so strong it’s amazing. Overall it’s a good video but there are some on the CFM website that show all that too. And from the horse mouth 😊

[@jeffnew1213]

@@ChapaLipar I was wondering if I could prevent an engine that is OFF from spooling up if I hold the front fan still. Before it starts rotating, keep it from rotating. I was told yes, but I think that if there's a geared starter involved, that might not be true. Holding the fan will not stop the starter from rotating and as the starter starts so will the fan, regardless of whether you tried to hold it still or not.

[@ChapaLipar]

@@jeffnew1213 ok. I got it. You can hold it with your hands. One hand is enough 😊 The starter is connected to the HP rotor, not to the Fan. And except during the starting sequence it is deconnected from the gearbox. Like in your car. But if you push the start button you will engage the starter and start to rotate the HP rotor, and the air sucked in will escape the HP compressor, then the HP turbine , then will flow to the LP turbine which is attached to the Fan. So as the HP rotor speed will increase, the torque applied to the Fan will increase too. Knowing that the engine starter on such engine is equivalent to around 150 Horsepower, you won’t be able to old it very long although there is no mechanical contact between the HP rotor and the Fan 😊

[@jeffnew1213]

@@ChapaLipar Interesting. So one would only have a short time until the LP turbine and fan become too difficult to hold still. Got it. So the best one can do is delay rotation of the fan for a few seconds at best.

[@kennyvcent]

Wow! You're so intelligent. We appreciate your work! Have you ever tried or thought about flying any of those birds? 😊

[@StigAviation]

i'm far from intelligent,, after 25 years of fixing i'm still learning everyday, as for flying... i tried it, it's not for me... i enjoy fixing more

[@gregsmith3410]

Is it Safran's responsibility for the Low pressure system, and GE for the high pressure components ?

[@StigAviation]

its a combination of efforts

[@njjeff201]

Kool stuff!!!!! TY ✈️

[@StigAviation]

🤙

[@ashrafshadid5870]

Excellent videos could you make videos for engine troubleshooting please

[@StigAviation]

Well that’s a very specific thing you are asking for. What part of the engine. There’s thousands of Troubleshooting procedures for just the engine.

[@ashrafshadid5870]

I mean any troubleshooting you face at work you can record it and then we can learn how you resolve it.

[@StigAviation]

@@ashrafshadid5870 I simply follow my troubleshooting manuals. It’s all written step by step.

[@sky173]

I really appreciate the content, but is it possible to hold the camera horizontally? I avoid TikToc for this reason, lol. Plus it'll make it a more enjoyable viewing experience having the ability to see more of the screen. Cheers and keep up the great content.

[@StigAviation]

First of all thank you for being here, i appreciate you for that, as for the vertical format , its hard for me at the moment because i cater to the mobile user,, and i shoot mostly with my phone, but ill try my best to do a horizontal format.

[@sky173]

@@StigAviation 🤗

[@BigEightiesNewWave]

I prefer this over the PW GTF engines. I read the report on their ground-testing engine failures. I prefer no planetary gears on my turbo-fan-jet engine.

[@StigAviation]

PW is definitely having issues with that power plant. I hope it gets resolved

[@edmanalo0218]

Hello brother! Just want to ask if the fan blades expands, i've been seeing signs of scratches on the acoustic panels on neos

[@StigAviation]

Yes indeed they do. Blade expansion is a normal thing within Certain limits... if Blade begin to expand too much that's called Blade Creeping ... at that point it will start to cause damage to the abradable liner...blade would need to be replaced.

[@Falk-x1r]

Could you show where the pressurized air exits after driving the starter? Is it vented into the bypass stream, or is there any exhaust similar to the one for the engine anti-ice?

[@StigAviation]

You mean from the starter ? Just gets dumped into the cowling and goes overboard

[@Busdriver321]

You mentioned the EEC in your video. The 737 has that. Airbus engines have FADECs.

[@StigAviation]

They both have the same thing, it’s just EEC is that physical box on the engine, FADEC is the system. The terms are interchangeable.

[@chrnc]

RightOn

[@StigAviation]

thank you

[@kraz904]

A lot different than the JT8D’s from yesterday and no stands to crawl on…

[@StigAviation]

And a whole lot quieter too

[@BsUJeTs]

Here’s an easy question for you and hard for others. What distinguishes one engine from another ?

[@StigAviation]

😅 that’s a bit of a odd question, let me see if I can get this one right, I suppose the spinner and the pattern on it.

[@BsUJeTs]

@@StigAviation the data plate. All the parts on the engine is replaceable except for the data plate.

[@StigAviation]

@@BsUJeTs once again that was a very broad question. So hard to answer it. But yes. Data plate it the way to go

[@jamowie4866]

Can anyone explain the difference between the CFM leap and the CFM56? I know the leap has the composite blades, does it also use a FMU instead of a HMU like on the CFM56? Cant find a clear answer online

[@StigAviation]

Well the leap 1A/1B is a very different design. It has advanced technology much like the GEnx. FMU and HMU work much the same in concept but how it does its job is different. Different compressor staging and well as advanced materials in leap engines.

[@jamowie4866]

@@StigAviation that's amazing, thank you so much! Dont suppose you know where I could find any more information on the inner workings of the FMU? Keep up the great vids!

[@StigAviation]

@@jamowie4866 www.researchgate.net/figure/Schematic-of-FMU-and-flow-rate-servo-control-valve-of-fuel-control-system_fig1_336391625 Try that for starting.

[@jamowie4866]

@@StigAviation legend! Thanks man, much appreciated!

[@gev340]

Wow ! Runup with engine cowl openned 😱 not allowed in case of engine fire !!!

[@gev340]

But i want to tell you that all your videos are very nice. I m instructor and you hare a very pedaguog guy !

[@StigAviation]

It’s actually is allowed only if you have fire extinguishers on site 👌. But otherwise it’s best to close cowling before running 👍

[@StigAviation]

@@gev340 thank you very much sir. Much appreciated

[@gev340]

@@StigAviation when i was young mechanic in the 90' we made the parce power on JT8 of the MD83 with open cowls and turning the rigging srew under the engine at idle. When i began in AirFrance it was not allowed for safety reason and specialy in CDG airport under EASA rules. I know you re true because we alway use to get a big ground fire extinguicher with us but for insurance policy it's a mistake under your responsability if a fire occure during runup cowl openned... Europe is strait with rules. Because there is a lot of money behind a plane. As you said about the prise of the leap.

[@StigAviation]

@@gev340 ahhh the good old days of trimming the engine at idle when standing under it … I do miss those days. JT8D holds a special place in my heart. Probably the last good engine PW made in form of design for a low bypass system.

[@karldoot2421]

Does the A220 have the same engine as A321?

[@StigAviation]

The A220 is Powered by Pratt & Whitney PW1500G

[@jeffzimnisky7073]

Why 400 htz?

[@StigAviation]

compact design if the generator

[@vittoriobacchiega9118]

I believe more efficient the DC conversion with small capacitors little ripple.

[@vittoriobacchiega9118]

How huge the part list of this motor?😂

[@StigAviation]

thousands of parts, i just went over the major ones

[@AS-ww3fe]

Wmazing

[@StigAviation]

👍

[@erict.35]

I don’t what he said

[@StigAviation]

?

[@erict.35]

@@StigAviation yes, I didn’t understand: 1. Where’s the APU. 2. How does the pressurized air start the engine 3. How exactly are the gearboxes connected 4. That valve is a regulator of what? …

[@StigAviation]

@@erict.35 you should watch my other videos. I explain a lot of that in other videos

[@erict.35]

@@StigAviation every engine has its dedicated APU?

[@StigAviation]

I think you were confused on engine and APU, APU is an engine. It’s just an extra engine in the back to provide air and electrical power, it’s got nothing to do with the main engines.

[@franciscosoaessilvestesilvestr]

Ai Filé dicas cênçacional de cada conponénte pneumateco e hidrallico e élêtricos e émjêtoris trabalho maravilhoso e Cênçacional amigo😀muito bom e Cênçacional👍🏻👏🏻👏🏻🤝🏻✍🏻

[@StigAviation]

Glad you enjoyed it