It truly is. It’s the pinnacle of aviation safety. Space travel is close but experimental and always subjective. But aircraft technology and safety is the standard for all.
Thank you for an EXCELLENT and very interesting video!!! As a licensed automotive technician for over thirty years, who has very recently taken a keen interest in aviation, this is extremely interesting to watch. I compare this to changing a set of brakes on cars and trucks to which I've changed probably too many by now. It's interesting to see the wheel assembly installed in a similar manner to the way wheels and hub assemblies are installed on teucks equipped with full floating axles. Torque to a higher value intially and then loosen off and retighten to a lower torque value. Also interesting to see the Michelin name on those tires. I bet those cost a pretty penny!!!
Indeed they do.. much like everything else In aviation. Lots of similarities between automotive and aviation design. Just a lot more redundant features.
Thank you sir. It’s an honor to have you here. By the way we have meet a few times. I’ve performed many ETOPS checks on your birds out of LAX. Cheers 🤙
Finally a video on this! Now I am confident to do this brake job on my Boeing 777 in the driveway. Next video should be adding subwoofers to the whole entire cabin.
When you first start working, you will get good training and you will also be assigned with a senior technician. You also have very detailed manuals. Nobody’s gonna throw you into the deep end and expect you to perform in the beginning.
@@StigAviation thanks for your reply my brother ,I’m very happy for all your accomplishments,you seem like a jovial person ,keep up the good work ,I’m very exited about working and learning more about this industry.
Brake changes are always fun, make sure to not pinch your fingers re-installing the tire. Especially love doing brake changes on 787, the Electric brakes make it even easier!
787 is such a modular bird, and very easy to maintain in regards to that. But the downside is that everything is software driven. So you changed the brake you better make sure the software is up-to-date.
@@StigAviation Very true, it’s amazing to me how software dependent the LRU’s on 787 are. I have found pushing software through the ODLF to be very useful as well.
@@StigAviation I always approached rims from front or back, never from the side, especially if they are hot like Stig said in another video, those are split rims and they can blow up and kill you
Thank you for making these! Never knew that's what the brakes looked like on airliners, for some reason I was picturing a disk brake like a car. Good day 😊
The rotors are keyed to the wheel by those "ribs" shown on the inside of the wheel. They can be a pain to line up when fitting the wheel back on the axle.
Oh My- 500 foot torque on main nut. Respect what you guys do to keep aircraft safe in skies. Concerning yesterday's incident at #SFO where an entire wheel and tire fell off, did #United Maintenance folks miss that including inspector,? Or do you think it was metal fatigue or some other failure inside wheel assembly? Very rare incident it seems.The 777 is my favorite airplane and been all around world on them.
I do not believe this was a maintenance issue, the United Airlines mechanics are incredibly proficient and some of the best in the world. I believe this was a wheel manufacturing defect.
interesting video! im almost done with school but have zero mechanic experience, im hoping to get into AA. Would you say going to the majors right away with no mechanic experience at all will be difficult?
@@ttam17 i would say it’s definitely the right way to go. Go for the majors first. Everything will be taught to you. There’s more training involved when you get hired
@@StigAviation thanks for the reply stig! I watch all your videos, these types of videos you post are my favorite where you deep dive into some of the work you do.
That's awesome. I didn't catch the thermal fuse plugs since I don't know what I'm looking at. I was looking because of the recent incident with Delta #1437 and the emergency evacuation.
Ok so right next to the tie bolts there is a smaller bolt like plug, its very dirty in there so a bit hard to see, but if you pause the video youll see it .
How do you know when the brakes need replacing? Is it based on the number of flight Cycles or is there a cockpit warning? Thanks for the fascinating video!
hey stig, after seeing the hub cap hides the safety device bolt to retain the main nut maintenance cannot see if the safety device is still intact. just a day ago a united 777 lost a main wheel assembly.
No need for that. It’s a closed system and the aircraft has quick disconnects for that. We can take off the pressure lines without compromising air getting into the system
super wonderful 777 wheel brakes hydraulic mechanical pressure & rotating axil & wheel bearing # but i want to understand exactly how hydraulic pressure pushes the shoes or pads against rotating wheel ???? ❤️🇵🇰
the wheel assembly has slots that slides on the brake assembly, as the wheel turns so does the brake disks. when brakes are applied via hydraulics the pistons will squeeze the disks and hence braking/slowing down the wheel
The stators can slide on the inner section of the brake assy so when all those pistons extend it squeezes them together. They are fitted alternately stator, rotor, stator etc. If you look at the video the bits sticking out are rotors which key to the wheel.
@@StigAviation I just thought of something funny Imagine if air forces had pit crews in active war zones so when a fighter jet with an issue lands they run over to it and change all the tyres in under 3 seconds and the jet screams down the runway and takes back off🤣
I do apologize for that, at the moment i film everything with my phone on the spot, so its a bit hard for me to constantly transition... i also post in IG and Tiktok and cater more to the mobile user. But ill get better camera equipment in the future to do landscape videos ... thank you for watching, i appreciate you being here
The brake overhaul workshop has the equipment to clean the brakes. Mind you once you have removed the old one the dirt is transfered to the new one so it doesn't stand out.😂😊
I am learning just now and also getting pictures of what actually happened. And from the pictures, I did see the main nut was still on the axle. This seems to be more of a wheel assembly failure.
@@StigAviation Really the nut was on ? I did think “there is no way someone can not install the nut.” So the rim went over the nut, the rim must of cracked badly to slide over the nut.
Good, informative video. Assume you are involved as you don't show the actual removal and refitting of parts, bolts, or torque loading. Brake dust and grease gets everywhere so not good for cameras. 😂
@@StigAviation I was going to ask about that stick if you did bleed the brakes because you didn’t show it you actually make it look easy but manhandling that tire and wheel over the brakes is an SOB. The rest of it is pretty easy except for the brake dust everywhere, which makes it dirty as crap, I’m retired and as much as I used to bitch doing it now I miss doing it take care of brother from an old retired guy
If I remember correctly, the 320 main landing gear initial torque is 300 foot pounds and final torque is 150 foot pounds. And for the 777 the initial torque is 500 foot pounds and final torque is around 200 foot pounds. But I’m going from memory, we usually never do that. I’ll always follow the manuel which is on hand while I work.
![Lp. Сердце Вселенной #60 РОЖДЕНИЕ ЛОЛОЛОШКИ [Финал] • Майнкрафт](http://i.ytimg.com/vi/YoR0pAV9FVQ/mqdefault.jpg)
Great to see the braking system up close and see the great team work that keep these airplanes flying safely, thanks Stig
Glad you enjoyed it, thank you for watching
For me, aircraft technology is the final frontier.
It truly is. It’s the pinnacle of aviation safety. Space travel is close but experimental and always subjective. But aircraft technology and safety is the standard for all.
It’s amazing how your team works with so little lighting. Experience, experience.
i have amazing coworkers experts in all things and they are my good friends
@@StigAviation There's nothing like working with a good team. It's a man thing.
Never seen videos so up close. You being doctor for air planes made it possible..
Great video Great voice over
Appreciate the kind words! Thank you for watching
Thank you for an EXCELLENT and very interesting video!!! As a licensed automotive technician for over thirty years, who has very recently taken a keen interest in aviation, this is extremely interesting to watch. I compare this to changing a set of brakes on cars and trucks to which I've changed probably too many by now. It's interesting to see the wheel assembly installed in a similar manner to the way wheels and hub assemblies are installed on teucks equipped with full floating axles. Torque to a higher value intially and then loosen off and retighten to a lower torque value. Also interesting to see the Michelin name on those tires. I bet those cost a pretty penny!!!
Indeed they do.. much like everything else In aviation. Lots of similarities between automotive and aviation design. Just a lot more redundant features.
Excellent! Thanks for posting.
Thank you sir. It’s an honor to have you here. By the way we have meet a few times. I’ve performed many ETOPS checks on your birds out of LAX. Cheers 🤙
Finally a video on this! Now I am confident to do this brake job on my Boeing 777 in the driveway. Next video should be adding subwoofers to the whole entire cabin.
🤣🤣 I’ll put that on my to do list. Be safe. Use your maintenance manuals 🤙
When you started working do they give you good training or they just expect you up know and remember everything from school ?
When you first start working, you will get good training and you will also be assigned with a senior technician. You also have very detailed manuals. Nobody’s gonna throw you into the deep end and expect you to perform in the beginning.
@@StigAviation thanks for your reply my brother ,I’m very happy for all your accomplishments,you seem like a jovial person ,keep up the good work ,I’m very exited about working and learning more about this industry.
Great video, seeing these essential components in so much detail. Thank you Stig!
Glad it was helpful! i appreciate you watching
Brake changes are always fun, make sure to not pinch your fingers re-installing the tire.
Especially love doing brake changes on 787, the Electric brakes make it even easier!
787 is such a modular bird, and very easy to maintain in regards to that. But the downside is that everything is software driven. So you changed the brake you better make sure the software is up-to-date.
@@StigAviation Very true, it’s amazing to me how software dependent the LRU’s on 787 are.
I have found pushing software through the ODLF to be very useful as well.
Very educative
Glad you enjoyed it, its a fun job
In case of brake fire, for firefighters, is it safer to approach it from the front and back of the wheel? Or the side(wheel cap)side of the wheel?
From the front or back of the wheel. Never towards the rim if it’s on fire
@@StigAviation I always approached rims from front or back, never from the side, especially if they are hot like Stig said in another video, those are split rims and they can blow up and kill you
Thanks Man very interesting to me I’ve done brakes all kinds of things as a mechanic since 1981 but never have I done anything to a plane
It's not hard actually much easier than a car, its just everything is bigger and we follow very strict manuals
His voice reminds me of the airline mechanic/ fisherman guy in Florida. Are they the same?
I know who you’re referring to. But I’m not the same person 😅
Thank you for making these! Never knew that's what the brakes looked like on airliners, for some reason I was picturing a disk brake like a car. Good day 😊
Glad you liked it! and yes they are disk brakes but there are multiple disks and they are stacked.
@@StigAviation oh that's cool! I thought they pushed outwards on the spinning wheel to stop it, sort of like a huge drum brake.
The rotors are keyed to the wheel by those "ribs" shown on the inside of the wheel. They can be a pain to line up when fitting the wheel back on the axle.
Thank you since again for a very informative video😊
My pleasure!
@@StigAviation am happy they allow you to film and show us this nuggets. I work in an airport and they are quite strict on taking photos or videos
Awesome, man, really awesome
Thank you! Cheers!
Nice im about to do an a330 brake change with another mechanic tomorrow, im sure the process is similar as the B777. Very nicely done 👍
It’s mostly the same but obviously AMM is slightly different between airbus and Boeing. But should be fun on a 330.
@StigAviation I'm more worried on how us 2 will carry the brake box and load it on the trailer lol 😆
Very carefully lol@@vkounnorath
Is that an old school craftsman tool box with some various brands of ratchets and sockets ( snap on, craftsmans ? )
yup it is... ill post video on my tools
@@StigAviation nice ! 👍
Yeah i think you need a tool befitting your position as an aircraft mechanic.
@@StigAviationI have the same box haha
Oh My- 500 foot torque on main nut. Respect what you guys do to keep aircraft safe in skies. Concerning yesterday's incident at #SFO where an entire wheel and tire fell off, did #United Maintenance folks miss that including inspector,? Or do you think it was metal fatigue or some other failure inside wheel assembly? Very rare incident it seems.The 777 is my favorite airplane and been all around world on them.
I do not believe this was a maintenance issue, the United Airlines mechanics are incredibly proficient and some of the best in the world. I believe this was a wheel manufacturing defect.
interesting video! im almost done with school but have zero mechanic experience, im hoping to get into AA. Would you say going to the majors right away with no mechanic experience at all will be difficult?
@@ttam17 i would say it’s definitely the right way to go. Go for the majors first. Everything will be taught to you. There’s more training involved when you get hired
@@StigAviation thanks for the reply stig! I watch all your videos, these types of videos you post are my favorite where you deep dive into some of the work you do.
That's awesome. I didn't catch the thermal fuse plugs since I don't know what I'm looking at. I was looking because of the recent incident with Delta #1437 and the emergency evacuation.
Ok so right next to the tie bolts there is a smaller bolt like plug, its very dirty in there so a bit hard to see, but if you pause the video youll see it .
@@StigAviation Ahh, I see them now...they are offset from the lug pattern. Thanks!
@@biggdogg285the #1 and #2 brakes on that plane locked up and blew the 1,2,5,6 tires. They were shredded not thermaled.
Is there Asbestos material used in the brake linings? Thanks for the great video.
None, its carbon ceramic material
@@StigAviation thank you sir for the response
That's cool. I literally just asked about this today. Thank you. Question on the torque. 500ft lbs is a lot. I'm assuming you use a torque multiplier?
Depends on how you use the wrench. The one I’m using is direct torque. If it was at an angle I would have to recalibrate
@@StigAviation thank you!
omg this is like my new guilty pleasure ;D
thanks for sharing
You're so welcome!
Are you also using a torque wrench for the cross bolts and v-clamp?
yes of course, i just did get a chance to capture that footage
How do you know when the brakes need replacing? Is it based on the number of flight Cycles or is there a cockpit warning? Thanks for the fascinating video!
There’s a brake pin wear indicator on the brake itself. When we walk around we look for that. When it’s close to flush we know it has to be replaced
hey stig, after seeing the hub cap hides the safety device bolt to retain the main nut maintenance cannot see if the safety device is still intact. just a day ago a united 777 lost a main wheel assembly.
Don’t worry, I’m gonna be addressing that in the next video. I’ll explain it very thoroughly.
Thank you brother. ❤
My pleasure 👍
Super interesting, how does the bleeding of the brakes work?
There are ports with shrader valves that can be loosed and release the air.
Hi stig can you please tell me how to deactivate hydraulics while changing the break assembly?
Well, you have to depressurize the system before you touch the brake assembly and the fluid lines.
Another amazing video! Does doing maintenance at night time make things any more difficult because of the lack of lighting?
Not at all, we have flashlights and most of maintenance is done at night
Nice to meet ya stig via Jerry bjtv
thank you Jerry
What about air removal from hydrolic line after replacing?
No need for that. It’s a closed system and the aircraft has quick disconnects for that. We can take off the pressure lines without compromising air getting into the system
No need for that is a quick disconnect Hydraulic line, meaning that no pressures was released from the system.
Love your videos. Why is the first torque value higher?
To seat the bearings 👌
super wonderful 777 wheel brakes hydraulic mechanical pressure & rotating axil & wheel bearing # but i want to understand exactly how hydraulic pressure pushes the shoes or pads against rotating wheel ???? ❤️🇵🇰
the wheel assembly has slots that slides on the brake assembly, as the wheel turns so does the brake disks. when brakes are applied via hydraulics the pistons will squeeze the disks and hence braking/slowing down the wheel
The stators can slide on the inner section of the brake assy so when all those pistons extend it squeezes them together. They are fitted alternately stator, rotor, stator etc. If you look at the video the bits sticking out are rotors which key to the wheel.
Interesting I thought you would have to bleed the brakes and put safety wire on
We did bleed them, I just didn’t get a chance to fill that.
Don’t the wheels have to be re-talked after X-y-Z of flights??
help me understand what re-talked mean? im a bit confused on that one
@@StigAviation
What I mean is, dose the wheel have to be checked after a few flights to make sure it has not come undone/ re-torqued.
@@NathanS2024never. It has lock bolts on the main nut.
Me if I was a pilot: how much would it cost for some BBS’S
BBS got some nice wheel 👌
@@StigAviation I just thought of something funny
Imagine if air forces had pit crews in active war zones so when a fighter jet with an issue lands they run over to it and change all the tyres in under 3 seconds and the jet screams down the runway and takes back off🤣
why torque to a high number then re-torque to a lower number?
It’s to seat the bearings, and then give it a final torque
Curious, how is bleeding handled?
Same way as you would in a car. Attach a hose and pump the brakes.
Here I am again can’t sleep learning how to change brakes on an B777
The more you know ...fun stuff to learn
Film in horizontal please next time
I do apologize for that, at the moment i film everything with my phone on the spot, so its a bit hard for me to constantly transition... i also post in IG and Tiktok and cater more to the mobile user. But ill get better camera equipment in the future to do landscape videos ... thank you for watching, i appreciate you being here
Where’s the AMM reference 😂😂
It’s on my iPad, all our manual references are now digital.
How many cans of brake cleaner do you go through?
Non at all.
The brake overhaul workshop has the equipment to clean the brakes. Mind you once you have removed the old one the dirt is transfered to the new one so it doesn't stand out.😂😊
That’s the nut they forgot on the plane that dropped a wheel in SFO. Right ? There is absolutely no way a wheel should fall off a modern jet.
I am learning just now and also getting pictures of what actually happened. And from the pictures, I did see the main nut was still on the axle. This seems to be more of a wheel assembly failure.
@@StigAviation Really the nut was on ? I did think “there is no way someone can not install the nut.” So the rim went over the nut, the rim must of cracked badly to slide over the nut.
I’ll be addressing this on my next video
Why don’t you guys pressure wash all that while you have it disassembled?
because its will need a full re-lube if we do that. it doesn't call for that in the manual to clean
@@StigAviation wow ok. It really stinks that it can’t be cleaned while your there, but it is what it is. Enjoy your videos though.
I have a video coming up on how aircraft get cleaned. Stay tuned 👍
@@StigAviation awesome
Hello my brother 🫂❤️
Hello 👋
Good, informative video. Assume you are involved as you don't show the actual removal and refitting of parts, bolts, or torque loading. Brake dust and grease gets everywhere so not good for cameras. 😂
It’s definitely a bit of a dirty job but very fun. I just took small clips here and there to give an idea of what it looks like
Hey u forgot to bleed the brake...
Didn’t forget. Just didn’t show it.
Was brushing up my basics... I got a big day tmrw.. Hope i clear with flying colours..
.neways thanks for the vid..
@@prasenjitwaghmare7536 best of luck to you
@@StigAviation I was going to ask about that stick if you did bleed the brakes because you didn’t show it you actually make it look easy but manhandling that tire and wheel over the brakes is an SOB. The rest of it is pretty easy except for the brake dust everywhere, which makes it dirty as crap, I’m retired and as much as I used to bitch doing it now I miss doing it take care of brother from an old retired guy
There is 1800 MH in Airbus and boeing 32 chapter 😎
Help me understand what you mean by 1800 ?
Just like my Honda….😂
😅 yup. Exactly like the Honda 🤣
And when the wheel falls off on takeoff it first crushes a compact car and then bounces and hits a Tesla. That's called a two-for-one special.
I just recently heard about that, it’s gonna be interesting what they find out
$300k brake 😅
no that much but expensive
sorry put one more "0" on it actual reference price is around 29k @@StigAviation
😂 ever wash those dirty wheels
They usually get deep cleaned on heavy checks
How much torque did you set for 777 and a320
If I remember correctly, the 320 main landing gear initial torque is 300 foot pounds and final torque is 150 foot pounds. And for the 777 the initial torque is 500 foot pounds and final torque is around 200 foot pounds. But I’m going from memory, we usually never do that. I’ll always follow the manuel which is on hand while I work.