Aircraft wheel and brake change due to damage.

Aircraft wheel change that turned into something else.
This is a very rare occurrence and i don’t want you to panic. Please watch the video because I explain it all to you. Yes i know it’s a long video… and I’m sure most won’t sit through a 10 minute video.. but it’s here for all that DO want to understand what is going on.
All this turned out to be broken tie bolts that caused the wheel assembly and brake assembly to seize up and creat and overheat indication in the flight deck. Pilots only have very little information when it comes to wheels. Tire pressure (on some aircraft) brake temperature (most aircraft) and anti skid information (on modern aircraft). All this data still can’t tell them a locked brake has occurred. But they do know how to counter it and how the aircraft is handling on ground.
When the aircraft came in we investigated and found all this and corrected the issue.. yes it did take a 4 hour delay, but in the end it was dispatched safely due to the amazing work of my maintenance team.
Thank you for watching as always … We Fix You Fly 🤙
#stigaviation #airbus #wheels #brakes #aircraftmaintenace #aircraftmechanic #aircraftengineers #wefixyoufly #damage #repair #longvideo #themoreyouknow #smartereveryday #instagramtaughtme #youtube #learning #boeing #themoreyouknow #aviation #airbus #aircraftmaintenance #stigaviation #learningeveryday #aircraftmechanic #aviationnation #jetengine

[@randyhoffmanfa3768]

From a 39 year pilot at American Airlines, I Thankyou for ALL you guys do! You have never failed me!!!!

[@StigAviation]

Thank you Captain. I appreciate you and your kind words. We will always keep you aircraft safe and airworthy 🫡

[@michaelchan8915]

An extremely interesting video. Changing out brakes and tires on an aircraft in comparison to doing the same on automotive vehicles.

[@carmelocali5074]

That is an awesome recognition! It takes a whole team to make every single flight go! All on the same team, and you’ll make it back to base as a team!

[@jasonshrout8921]

What they tell you vs what they do. Trust but verify. This generation of A&P techs is t what it used to be. They are effing weak spirited.

[@aerialbugsmasher]

From a guy that's worked at the front office of that very ship number at some point, thanks for all you do.

[@StigAviation]

it's interesting to watch the metal we all work on.. you seeing it from your perspective and me from mine... but we both know that we are a part of it.

[@jayj6951]

Also worked in the front of that ship. Left hand seat

[@StigAviation]

@@jayj6951 😉 captain … I bet you seen me on many gate calls at LAX 🤙 don’t be shy. Say hello

[@braveworld2707]

*0A* is the best seat in the office. 👍👍

[@michaeljohn8905]

And from one of the Students of (not these airplanes much smaller ) thank you for maintaining these and all types of aircraft and also from someone who works on them also (much smaller airframes ) your welcome 😂😂 I love flying em and I love fixing em.

[@carmelocali5074]

Brother, I am just a private pilot with my commercial and IFR rating… your channel is going to the moon! Keep this content going! Not only does it help non aviation people feel safer that you are there on standby but for aviation people like myself, I love the background of everything! Seriously, from the bottom of my heart, good luck! I subscribed in the first minute, it’s only one, but… it will grow! Take care and thank you for keeping us all safe up there!!! Nothing but the best to you and your team.

[@StigAviation]

Thank you so much for your kind and thoughtful words sir. It’s a pleasure to have you here and I’m very happy you are enjoying it. I got plenty of fun videos with lots of adventures in aircraft maintenance. If you see anything that you find interesting, don’t hesitate to ask questions. I’m always here to listen, teach and learn.

[@Dave-pp1td]

You all are just as important as the pilots. Good work!

[@DannyLB]

I have an irrational fear of flying. It is not stopping me from flying mind you but it can at times be stressful. Watching your channel, understanding the redundancies in place around, well, pretty much everything has really helped me. Knowledge is indeed power. Thank you.

[@StigAviation]

Thank you for saying that and I’m very happy you enjoyed it and learned.

[@mrmoosygoosy2500]

Flying is the safest way to travel statistically speaking. You are more likely to die driving to work than flying.

[@NeroontheGoon]

It’s not irrational, that vertical component coupled with gravity will kill you deader than a doornail!😂😂😂

[@zeroelus]

I hope you find good ways to manage those irrational thoughts. I had similar issues with heights, but it wasn’t until I started addressing general anxiety disorder that I noticed my fear of heights was greatly reduced. Stay strong!

[@MDSsp251]

Amazing Video! Interesting to see 2 wheel tie bolts shearing together. We typically check to see if the right procedure(s) were used during wheel assembly (i.e. bolts tightened in a criss-cross pattern. Otherwise you run the risk of few tie bolts in a severely stressed condition). Checking to see the number of hubs and NDT inspection the bolts have gone through is also helpful in identifying if the probable cause is indeed the bolts. If wheel assembly procedures and time on the bolts are noted to be satisfactory, we may look somewhere else.

[@StigAviation]

This was quite interesting...and we were all a bit puzzled... but regardless of that we were happy to get it all fixed... we also submitted a safety report to the overhaul facility to see why this happened... hopefully this was just a fluke.

[@Alex_FireLion]

I got to go into the cockpit of this bird a few weeks ago. First cockpit I have ever been in, got to sit in the captain’s seat and everything. It’s an honor that you worked on the very bird I got to fly in. N400AN is a very nice airplane!

[@StigAviation]

I’m so happy you got to enjoy that and experience that Alex, fun fact, aircraft 400 is the very first 321 Neo we got for delivery

[@Alex_FireLion]

@@StigAviation Ha, that’s so cool!

[@jordanzempel111]

Good to know indigent, passionate, and hardworking guys like you are still fixing aircraft... for now.

[@StigAviation]

Thank you for the kind words Jordan

[@wb3161]

Having 39 years of experience in automotive Ive worked on nearly every except airplanes and trains, I think this is very interesting and a very well put together video. I’ve seen some other ones you have they’re all great thank you for sharing it.

[@StigAviation]

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

[@Snaproll47518]

Good video that I forwarded to a young neighbor thinking of a career as an airline A&P. I hope he is inspired and gets to work for a big airline in a couple of years. Stuff happens; lucky there wasn’t any damage to the axle.

[@StigAviation]

I hope your neighbor enjoys it, let me know if they have questions about it.

[@danielepellizzon7895]

I am VERY happy and pleased I discovered this channel! I would not let it go!!! Congrats for a great job!!!

[@StigAviation]

Thank you so much! Thank you for being here

[@biggdogg285]

Dude, that was freaking awesome. Incredible job for you and all those involved.

[@StigAviation]

Thanks a ton! I appreciate it

[@williamcook4315]

Just got hired on at American Airlines here in Charlotte.,NC and in school to get my A&P your video's are great

[@StigAviation]

Thats Awesome, Congratulations... keep up the good studies... don't hesitate to ask questions... i'm here to help

[@williamcook4315]

@StigAviation Thanks really appreciate it. Done with my general classes so gone take that test soon. Going into Airframe or PowerPlate next. Any tips on the general test?

[@StigAviation]

@@williamcook4315 word association for passing the written tests. Remember the basics for the O&P

[@williamcook4315]

@@StigAviation Appreciate

[@scottbeyer101]

As a passenger and a (GA) pilot, I thought this was an outstanding explanation. Thank you. Love your enthusiasm for the problem solving and safety aspect.

[@StigAviation]

Thank you Scott. Much appreciated. And thank you for being here and watching

[@abdulazizsaleh8650]

As a Supply Technician...i know the amount of pressure on you guys...i do respect all the Efforts and works on that...such an important part of Flying.... Thank you 👏🏻 💐 🇸🇦💯👍🏻🌴

[@StigAviation]

Thank you very much. I really appreciate you saying that. Thank you for being here.

[@duncanbrode381]

This was a fantastic walk-through! Thanks for going to the trouble to document and share! ❤ Bravo! 👍

[@StigAviation]

Glad you enjoyed it! Thank you for watching Duncan.

[@JeffHochberg]

Thank you for doing what you do and taking so much pride. You keep the skies safer each day! And your transparency and education are very valuable!

[@StigAviation]

It’s my pleasure Sir. Thank you for being here Jeff

[@sprinklersolutions11]

Awesome video! I find it very interesting to see what goes on behind the scenes. As always keep up the great videos! Cheers!

[@StigAviation]

Thank you very much!

[@jayearl9848]

In Ops, I've seen you guys come out to many emergency aircraft that can no longer taxi and change the tire on the rwy. Amazing watching you guys from the comfort of my Tahoe...in August...in Houston. Great job. Thanks for describing the "stuff" we find on the rwy during our inspections.

[@StigAviation]

We try to do as much as we possibly can to help. And I have gotten quite interesting photos from some of my friends at LAX ops asking me what that part is.

[@zenger74]

This takes me back to a long time a go... working in the wheels and brakes overhaul shop at Schreiner at Maastricht airport. Good times! Mostly Dash 8, ATR 42/72, Embraer 120 and F27 F50 stuff, but we did get to put an AN124 back into service wich had been impounded at Maastricht and had stood on the side of the ramp for several years wich was pretty cool for a 24 year old me.

[@StigAviation]

Hold onto those good memories, sometimes we get to see something amazing, and it stays with us for a long time

[@johnthackray2820]

Great video! What an unusual string of events; tie bolt failure, brake damage and subsequent tyre damage, nice works guys!

[@StigAviation]

We were all very happy to catch it before any further damage. It all worked out.

[@xnavyro]

Hopefully AirBus has a notification requirement to notify trends in failures? Great job!

[@StigAviation]

Indeed they do, and it’s more to the wheel assembly manufacturers than to Airbus. But yes They were notified with a safety report from us.

[@witheredaisy]

Stig, my fascionation towards aviation is nothing but recent and i certainly did not expect to end up on this path at all. But it was only when coming across one of your videos a couple months ago that i actually decided to take a leap and pursue this beautiful path. Thank you for the reassurance and passion you show on your videos, its truly insightful and i am prepping myself to start studying next year. Gotta cheer up on that amazing work that you do, thank you again. (Also, if you see this comment, what happens with the tires you remove? Are they disposed? Sent back to someone? Also, the sound of the pistons was astounding, truly beautiful.)

[@StigAviation]

Glad you are here and enjoying it all. And to answer your question the tire and whole wheel assembly will get sent out to an overhaul shop. If it’s still usable they will recap it. If not then recycled. 👍

[@dubbct1589]

Nice video showing good details, but I was wondering why you did a taxi test? AMM doesn't call for it (we can't do it here under EASA now anyway) and your delay would have been less

[@StigAviation]

Because I was not satisfied, I wanted to make sure that it was no other issues. That is my prerogative as an aircraft, maintenance technician, if I choose to taxi and aircraft to make sure the aircraft is deemed to be airworthy, then I will do so. at the end of the day it is my signature that is approving that aircraft to be airworthy, I will not put people on board unless I am completely satisfied with the product I put out.

[@stellarproductions8888]

I remember in a later video, you dealt with a flat tire due to a valve core that failed in the stem, while a rare occurrence, it has been known to happen, I've changed out many myself. But I was not prepared to see the damage done to this wheel and break assembly, as well as the blown out tire on this one, wow! Hear I was asking myself, what caused this unfortunate disintegration? So it was a tie bolt in the split rim design, dang! I agree, whole new wheel assembly, break assembly, and tire required for this one! 200-PSI? Dang, thats a lot of pressure in those tires! Funny how the break pistons sound like cranking over an engine. I love how you give all those hearts of love. 💓 I've watched so many of your video's, and am learning so much. You have massively improved your video production in the modern stuff though, and everytime I have a question, you seem to answer it in an older video, so I don't have to ask lol. I know, your awesome.

[@StigAviation]

I’m glad it’s working out well, and I am trying to do better every video and try to include as much information as possible.

[@stellarproductions8888]

@@StigAviation From my heart to yours, I appreciate it. 😃

[@jimurquhart9466]

Thanks for all your years of service. Question how many people Cycles do you think it went through before I spotted it?

[@StigAviation]

It probably happened on that flight. Because it’s not something that can be easily missed. And thank you

[@jimurquhart9466]

@@StigAviation Thanks for taking the time to answer. Stay well.

[@mapleext]

Much respect for those who design, engineer, fly AND maintain aircraft. Great video!!

[@StigAviation]

Many thanks

[@dcxplant]

I'm on the 320 series, and THANK YOU for a great job. I trust my life to our mx men and women.

[@StigAviation]

We fix You Fly. 🤙 I appreciate you being here, thank you for watching.

[@rvborimax]

Good job, especially the maintenance taxi😅

[@StigAviation]

Thank you

[@leiag201]

The aircraft is a machine!!!, wow you learn something new everyday

[@StigAviation]

👍 glad you enjoyed it.

[@e.vasquez9946]

Pictures worth a million dollars...CYA, personal safety and team safety first... Great job... hope your being paid well

[@StigAviation]

Thank you. And yes I am. It’s an amazing job.

[@tori8380]

I’m amazed you do all that work at the gate.

[@StigAviation]

It’s absolutely fantastic job, so much fun

[@RetroJack]

Did you call for FOD inspection of the runway after this came in? It seems likely it would've left something behind.

[@StigAviation]

All the damage was contained, and no foreign object debris was reported by airport operations

[@RetroJack]

@@StigAviationGood to hear!

[@SNMIKE1]

God bless you for your commitment to us all!!

[@StigAviation]

Thank you for your kind words, i appreciate you

[@katout75]

Thanks for this very informative video on the A321 tire/wheel/brake assembly. As well as explaining the failure and redundancy

[@StigAviation]

Thank you for watching. Glad you enjoyed it

[@Rhaman68]

Safe flying is because of engineers and mechanics!! Thank You! Ret Capt

[@StigAviation]

Thank you Captain. Much appreciated. Hope you are enjoying your retirement.

[@samspade8612]

Excellent video. Many disasters averted due to alert aircraft technicians. An investigation should've been initiated to discover the failure of the Tie Bolt. That's not suppose to happen. Keep up the good work!

[@StigAviation]

Absolutely. Attention to detail is the key 👌

[@CaptFlyer744]

Great job with the video and the commentary! We pilots feel safer with you guys doing the hardest work ensuring our safety on the ground and in the air! Keep up the good work and thank you 😊😊😊

[@StigAviation]

Many thanks Captain 🫡

[@jordanhenshaw]

“Aircraft don’t fall out of the sky.” Boeing: hold my beer

[@StigAviation]

How does this relate to the video Jordan?

[@osmosisdaily]

love your channel, im surprised people are interested in aviation maintenance, love it

[@StigAviation]

Glad you enjoy it!

[@osmosisdaily]

@@StigAviation I’ve been subscribed for awhile but I got a call about dragging brakes from a buddy in San Diego on an A330 and I went down this rabbit hole 😂

[@Stufftowatch21]

I love it when MLG tire change turns into brake change because it seized up.

[@StigAviation]

I was just happy it didn’t cause more damage

[@-Primer-]

Pretty awesome that you had a caliper/brake assembly kit on hand. Those looked to be 3/4 or 1 inch bolts, and I assume they were Titanium. Did you send them in for testing? 18 Qty 1" bolts should have an amazing amount of tension strength , and I would love to know the root cause of failure. Titanium is also extremely resilient to heat cycles, so I doubt anything heat related would cause the failures.

[@StigAviation]

We usually have the most common parts on hand, which is wheels and brakes, and we did send out the damaged bolt for analysis. It seemed to have been a defective bolt.

[@dadgarage7966]

Those bolts are metric.

[@StigAviation]

@@dadgarage7966 no they are imperial. All commercial aircraft are SAE standard

[@ManeeshMason_z]

Thanks for this knowledge sir. Great

[@StigAviation]

So nice of you

[@douglasslotolowicz9454]

That’s an interesting one with the tie bolt failing and jamming the brake assy. I once had a main wheel on a Gulfstream IV come apart on takeoff out of San Juan. We didn’t realize it until the tower told us we left something’s behind on their runway.

[@StigAviation]

Glad you landed safely. Did you find out why it happened?

[@douglasslotolowicz9454]

Yes, though I NDTed the wheel at every tire change a slight crack was there from day one that never got discovered over roughly 20 inspections. All the parts were sent to a lab that Gulfstream used which created about a 40 page report with pictures from a microscope camera. Fortunately only a drain mast and an opposite side wheel speed sensor got wiped out with us landing in Miami uneventfully.

[@StigAviation]

@@douglasslotolowicz9454 the one that got away. Factory defects or just bad luck on that wheel. Most importantly you walked away. I call that a win.

[@stephensiegrist7239]

Quick question: did you guys have to bleed hydraulics when you installed the new brake assembly??

[@StigAviation]

Yes we did. I just didn’t get a chance to show it.

[@DeRico1337]

3:45 RIP rag, you were a real one 😢

[@StigAviation]

😅 it served me well 🫡

[@patkar4449]

wow so cool! I'm left speechless! thank you to you and all aircraft maintenance techs.. amazing job! thank you for your services! very fascinating to watch! thank you for letting us watch what happens on your day!

[@StigAviation]

It’s my pleasure!

[@freedomforever6718]

Very educational. Excellent narration. I subscribed.

[@StigAviation]

Thank you very much. I appreciate you being here

[@hasanyaghnam1201]

Thank you so much for the helpful instructions. I’ll be changing the brakes on my 747 when the parts come in

[@StigAviation]

Awesome. Good luck and make sure to be safe. Even tho this video was on an Airbus. I’m sure you’ll figure it out 🙃.

[@drpenguin4478]

You need one of those chest cameras.

[@StigAviation]

You’re right

[@UncleRicoOSU]

Do you need some type of certification to be allowed to taxi the aircraft? I imagine not all maintenance crew are allowed to do that.

[@StigAviation]

Yes. The certification involves training for the particular fleet type of aircraft as well as a proficiency check ride with a designated instructor for taxi/run up/high power run/towing.

[@DavidAlanArnold]

Amazing Story. Thank you for sharing this!

[@StigAviation]

My pleasure Dave

[@throe68]

Just wondering - a million years ago when I worked aircraft maintenance, no hats were allowed to be work on the flight line due to potential FOD hazard. I take it that changed?

[@StigAviation]

Yup it has changed. Now they issue us hats as part of our uniform. Although I’m not complaining. I love wearing my hat, keeps the skydrol off my head 😅

[@jasonpfannenstiel9315]

Excellent video.

[@StigAviation]

Thank you very much!

[@criticalmass181]

One of the coolest jobs going. Very interesting video.

[@StigAviation]

Glad you enjoyed it!

[@robertahrens9481]

Notice how well that Michelin tire held up. They cost more but they're the only tire I will buy.

[@StigAviation]

Goodyear and Bridgestone also make good quality aircraft tires. 👍

[@kenh4848]

Great video! Just wondering if a runway inspection had to be performed to ensure there were no broken parts on it.

[@StigAviation]

I’m sure airport operations are doing that, they do runway inspections on a periodic basis.

[@Aitmesss]

Love your fibe on this aviation topics One question, though. How is it determined that there are nog verder hidden damages in other parts of the front weel system? I imagined that there have been many forces and strengths in and on various aspects because of this sustained damages. I am thinking about hidden development of cracks in some part of that landing area or somewhere else. I mean, is there a sort of renewal of certification ad a sustain point or level of damages or repairs

[@StigAviation]

Well, this is why aircraft have periodic scheduled maintenance and inspections when the aircraft has overnight stay. Certain components will be inspected thoroughly. Also the aircraft will get scheduled to go into heavy maintenance at one point or another.

[@NeroontheGoon]

Been an A&P on commercial aircraft for 35+ years, heavy stuff. Tires on large commercial aircraft have the potential energy of several sticks of dynamite. You don’t ever loosen the axel nut without a cursory inspection of your tie bolts and deflation of the tire. I had a B747-200 return to gate after a rejected take-off at SFO and the rapid unscheduled disassembly of the tire and wheel destroyed the forward and mid element of the inboard flaps. Tires are no joke!

[@StigAviation]

You are absolutely right on this sir. But here’s the problem I run into on this particular aircraft. The tie bolts are covered by a dust cap, so I don’t see them on this particular model of aircraft. But i know how to look for signs of damage. Yup. Tires ain’t no joke.

[@NicholasRiviera-Dr]

If the hub follows the axle nut out, then you know you have a problem

[@kingjames8283]

Yep, had one of these come apart on left main gear after a hard landing several years ago which during rollout and taxi to gate made a hell of a racket up inside cabin, lots of grinding noise, and intense smell of smoke. The actions which led to this failure were many due to pilot error but those of us in the back though slightly shaken did make it safely to our destinations but that poor aircraft. It pains me when poor decisions from the flight deck contributes to damage of a perfectly good aircraft.

[@StigAviation]

I’m glad you were safe and made it, and it is sad to see aircraft get damaged, but the silver lining is redundancy and various safety features.

[@jackglossop4859]

Had no idea an engineer could taxi an aircraft. Amazing

[@StigAviation]

Yup 👍 most of use are qualified for such tasks.

[@alexandertoledo8742]

Good work!! However did you discover why the bolts sheered off? That’s the true cause. Maybe a hard landing?

[@StigAviation]

The initial report was a hot brake, but when we investigated further and looked into the wheel and brake assembly we discovered small pieces of the bolt and other components damaged.

[@ottopartz1]

Those high pressure aircraft tires are scary when damaged like that. It's a heck of a lot of noise and force when they explode. During the early days of the space shuttle program NASA realized the potential problems of deflating damaged tires with pressures of over 350 psi cold. They tried using a bomb disposal robot, but it didn't work very well and cost a lot back then. So NASA engineers developed a tire assault vehicle out of a RC tank, a cordless drill, a video camera and some battery packs to safely deflate tires from a very safe distance. If you look it up it should make for a good read.

[@StigAviation]

That is very interesting. I didn’t know that. Thank you for sharing that knowledge with me. I learned something new.

[@ottopartz1]

@@StigAviation Your welcome. I remember hearing about it years ago and it stuck with me. And thank you for showing that brake mechanism, that unit is awesome! It looks like 4 rotors, big circular pads and like 20 pistons make up that insane unit?

[@repatch43]

Any concern about FOD on the runway it landed on?

[@StigAviation]

Airport operation usually runs consistent foreign object debris checks on the runway. We notify them about this.

[@johnfisher7143]

I didn’t see you bleed the brake system, is it self bleeding?

[@StigAviation]

We did bleed the brakes, my apologies I just didn’t catch it on film.

[@PiSkiS320]

Awesome channel! Thank you so much for your hard work and keeping us safe out there!

[@StigAviation]

It’s my pleasure and thank you for being here

[@marvincjr]

AWSOME STUFF! As an A&P on corporate I'd love to taxi a big airliner!! Congrats and great content!!!😊

[@StigAviation]

Thanks a ton! Taxing these big jets is pretty fun, it’s like driving a big Cadillac, with unlimited power. Keep up the good work on the corporate side of things, I have never had the opportunity to work in that side of the business but I’m always fascinated with those jets.

[@stevemorris289]

Very well explained and a thorough job. Top work. Thankyou

[@StigAviation]

Thank you very much Steve. I appreciate you being here and watching.

[@joeobrien8246]

I learned something today thank you very much you explained it perfectly I don't know what darn thing about aircraft but now I know a little bit more than I ever did

[@StigAviation]

I am very happy you enjoyed it

[@UncleHo5]

I work as ship board engineering on ocean going ship. I wear gloves only when I work with steam. For the other jobs I work without gloves. I don't feel anything with gloves, no feedback on what I m doing with my fingers.

[@StigAviation]

I completely understand where you are coming from and I tend to be the same way.

[@NicholasRiviera-Dr]

I am an aircraft maintenance engineer aswell. I always wear disposable gloves when doing jobs. Over time you get used to the feel with them on. Your right, the feel is not as good, but I would rather stop my skin from peeling off (try using skydrol with bare hands). The materials used are usually carcinogenic and will eventually kill you. The other problem is when I eat my lunch, I don’t want all that grease, oil and crap on my hands. I’ve seen plenty of KZbin videos where car mechanics wear gloves and the author has been given a hard time in the comment section for wearing gloves and they are seen as “weak”. Read the contents of the containers that the materials come in, it’s all bad stuff. MJ2 engine oil even has some contents that is unidentified 😮

[@UncleHo5]

@@NicholasRiviera-Dr wearing gloves when you work with chemicals is mandatory. I use gloves in this case. Or when I work with steam. Sometimes 2 pairs, one on top of eachother when I work with aggressive chemicals. But on regular jobs I like to work without them.

[@NicholasRiviera-Dr]

@@UncleHo5 I use 2 pairs of gloves a lot of the time aswell, usually when it’s a long job and the outer pair is prone to tearing. That way when the outer pair tear my hands are still protected and it’s easy to put a new pair on over the top of the inner ones. Trying to put a pair of gloves on when I have sweaty hands is difficult

[@njjeff201]

Lotsa fun! I had a mgr. at a Ford dealership who made us pack wheel bearings on every oil change… why I don’t know but I musta done hundreds and by hand not with a bearing packer. Thanx for sharing. BTW… how fast do you taxi on your road test? ✈️✈️

[@StigAviation]

We don’t exceed taxi speeds … usually around 15-20 knots. Unless otherwise stated to expedite by tower.

[@uriellopezrivero3408]

Nice work! 💪🏽

[@StigAviation]

Thank you 🙌

[@techdefined9420]

Very interesting, thans for sharing. I wonder how the fan is driven, no electric motor can be seen..

[@StigAviation]

Good question! and your assumption is correct... the brake fan motor is driven by a 3 phase electric motor running on 115 VAC

[@techdefined9420]

@@StigAviation Thanks for your reply, but where is the motor?

[@StigAviation]

@@techdefined9420 inside the axel housing. Watch closely you’ll see the spline shaft in the middle

[@DColcla]

Say Stig, when ya’ll do taxi checks, is there a speed limit that you can’t pass, or is it a judgment call on your part? Obviously, not to Accelerate/Stop, correct? Nice meeting you this past Sunday, btw.

[@StigAviation]

Usually we follow the policy of not exceeding 20 knots on taxi speeds unless otherwise specified by tower to expedite, at that point we just use our judgement to safety. It was a pleasure to meet you as well sir.

[@mattblackledge9068]

I went into motorsport, but in hindsight wish I had gone the aviation route.

[@StigAviation]

It's never too late, but motor sports is fun too.

[@mattblackledge9068]

@StigAviation it's not all it's cracked up to be. Lots and travel and late nights.

[@miguelsuarez8010]

I imagine the size of the warehouse for the thousands of components you must have for quick replacement so that the aircraft keeps in the air. Is it true that tires are filled with some sort of inert gas instead of air?

[@StigAviation]

We have a massive hangar with a storage specs. Very big. And yes the tires are filled with nitrogen.

[@aviatorbja]

I did not know that mechanics were allowed to taxi the aircraft. Is that a special certification or standard with A&P?

[@StigAviation]

That’s a specific certification and training requirement to taxi/tow and power runs.

[@georgepaiva7496]

Hard to believe that plane was able to drag that frozen wheel assembly

[@StigAviation]

Well it didn’t drag it consistently. It was just a few moments, hence why the brake was deteriorating.

[@rumblethis2023]

Are the brakes self bleeding?

[@StigAviation]

In a sense they are but we still bleed them after changing. I just didn’t get a chance to show it.

[@Matthys70]

Nice VID, I like your detailed explanation.

[@StigAviation]

Glad you enjoyed it. Thank you for watching Mat

[@flymachine]

Tie bolts shearing on the rim assembly seems to me would be from twist torsion rather than tire pressure? I could be wrong I don’t know commercial aircraft systems

[@StigAviation]

You are correct, usually happens from excessive torsion. But in this case, it was a defective bolt.

[@lord-heller647]

I love your job!

[@StigAviation]

Me too

[@ElBantosClips]

How do you bleed the calipers?

[@StigAviation]

Same way, you would do it on a car, just hook up a line to the bleed port on the brake assembly and pump the brakes. Allow any kind of air to vacate the system.

[@TheKbrizzle81]

Good eye my dude! Really enjoy this kinda content

[@StigAviation]

Thank you very much sir, I appreciate that. Thank you for being here and enjoying it.

[@billthecat129]

I thought this was an amazing explanation...thanks!

[@StigAviation]

Thank you very much. Glad you enjoyed it

[@ahmettaskn5687]

It's such a cool thing that you can power taxi the aircraft cuz we can't in EASA regulated countries

[@StigAviation]

It’s one of the best parts of the job. I’m glad the FAA gives us that permission.

[@andrijasaviccsavic1124]

Great video my guy, im courious, how do you tighten those 18 bolts and main one? Fo you use torque wrench or some other specialized tool?

[@StigAviation]

Yes indeed a torque wrench that is calibrated

[@andrijasaviccsavic1124]

@@StigAviation thanks on answer. Im going into Aviation highschool, maintenance technician class, and your videos are really interesting, since im watching how my future job looks. Keep pumping videos!

[@PhD63]

The tie bolts are only tightened in the wheel shop during the wheel assembly. They won’t be touched on the line. Only the main axel nut will be tightened to spec on the line.

[@andrijasaviccsavic1124]

@@PhD63 thanks for additional info!

[@sipe12]

Great video, great content. I'm interested did you bleed the brakes and how is it done? And why didn't all pistons pushed the brakes in test mode? Very interesting all together, keep up the good work!

[@StigAviation]

We did bleed the brakes via a shrader valve, I just didn’t get a chance to show it. The pistons have a dual redundant system, normal braking and alternate braking. We test both systems, hence why you see only one set moving at a time.

[@sipe12]

@@StigAviation thanks for clarification, good to know how airplanes are working and how people like you keep them running and keep us safe. Thank you and all the best!

[@emgee44]

So would those broken bolts be sent off for analysis to find out why they sheared off. Or is it just another day at the office kinda deal?

[@StigAviation]

Yes, indeed, those bolts were sent out for an analysis. Found out later on that. It was just a defective bolt. As I said, a very unusual occurrence, very rare.

[@kenugget9593]

Very interesting and educational video, thanks for sharing! How is the brake fan driven, by electrics or pneumatic? One more thing, when the bypass pin is inserted, why does it seem the parking brake system disconnects as the plane rolls a bit on A320 family?

[@StigAviation]

Great questions… the brake fan is electrically ran by a 3 phase motor in the hub of the axel. As for the bypass pin.. that only disconnects the steering. The brakes still work as usual

[@kenugget9593]

​@@StigAviationThanks Stig! I was curious because I couldn't see any wiring. A guy mentioned ZTP mode for the bypass pin, I didn't quite get what that was. If the plane is parked on a down slope, it will roll into the chocks (if there are some gap) as soon as the bypass lever is pulled. Some people suspected that it disconnected the hydraulics to protect PTU, others to let the nose wheel to align in case it was parked with an angle 😅

[@StigAviation]

@@kenugget9593 😅 ohh boy .. you got some conflicting information there. So the bypass pin has no connection to the PTU. It simply disconnects the electrical signal that sends hydraulic pressure to the nose steering actuators. When the pin is pulled and hydraulics are running, yes , the nose wheels will center themselves. As for aircraft sitting on a slope, if the brakes are set, it’s not going anywhere and the chalks are another form of stoppage if the brakes fail. Hope that clears it up.

[@theeaskey]

Im surprised they still use those widow maker rims.. very dangerous to work on .

[@StigAviation]

They been using that style for a while now. It’s an industry standard.

[@bobramroop7495]

Great video. Thanks for sharing. Is it easier to pass FAA A&P exams than that of EASA?

[@StigAviation]

It’s much easier to pass the FAA exams then the EASA. I personally don’t like how EASA part 66 Modules are taught

[@bobramroop7495]

@StigAviation I think EASA exams are harder and entail a lot of detail and indepth analysis.

[@StigAviation]

what i have seen is that EASA exams also give some unnecessary info as well @@bobramroop7495

[@Odontomango]

Man, I hope you wipe your hands before touching the flightdeck hahaha. But dirty hands are just signature of mechanics in my opinion.

[@StigAviation]

Yes I’ll clean my hands before I touch anything inside the aircraft. Dirty hands 🙌 clean money 👌

[@ashrafshadid5870]

Perfect job ❤

[@StigAviation]

Thank you so much

[@piertrib7765]

Subscribed after watching the first minute of the first video I’m watching from your channel 😎

[@StigAviation]

Glad you are enjoying it. Thank you for being here.

[@TommyG11814]

Great videos

[@StigAviation]

Glad you like them!

[@gabebikes]

Does maintenance look at every aircraft during every gate approach or is it random?

[@StigAviation]

@@gabebikes at my station we do.

[@douglasemerson9017]

The thing in the center of the hub. Is that the anti-skid sensor?

[@StigAviation]

Yup 👍. That’s little probe with a spline is the anti skid Good observation sir 👌

[@fatherof4kids]

What a cool job. You have a new sub my friend.

[@StigAviation]

I appreciate you being here. Thank you for watching

[@ronduncan9527]

Awesome video and education!

[@StigAviation]

Thank you very much Ron.

[@conned]

Thanks for sharing!! I always wonder where is the shear pin, area?..

[@StigAviation]

I’m glad you enjoyed it. And when you say sheer pin, which are you referring to?