Brake unit change B747-8

How do you do everyone. As promised, last week I arrived at the aircraft to operate a flight to Hanoi and back. On arrival, engineering advised that they needed to change a brake unit on the number 7 wheel. This is how it went. Some good points of note is that the jacking up of the wheels does not lift up the whole aircraft but only the wheel truck pair as shown. The brakes fitted to the ab747-8 are Carbon brakes and operationally are excellent. The brake wear indicator is what I show you as the pin that creeps inwards as the brakes get worn. When the pin is flush pretty much, the brake unit needs to be changed. The mechanics did an excellent job and the delay was minimal on my flight that evening. Read the captions as usual. Hope you like it. Chi Di Gin! Later!

[@pannuelpais5877]

It's so interesting to see those hard working mechanics changed the brake unit for the aircraft. I work as a heavy duty truck mechanic and I really enjoyed watching your video captain.

[@emmanuelosaghae6566]

Thank you Captain Mazinyi. You make operating and working on the B.747 look so easy and educative. Hats off to you Skipper. Safe flying at all times. God bless 🙏.

[@pilot_obet7815]

Cheers- thanks

[@Nickthestorekeeper]

If there's one thing I've learned in my life, there is nothing like having the proper tool for the job. Night and day difference when you have it and when you don't.

[@brlira]

Excellent video Captain as always! Very interesting how much work is needed “just” to change a single brake unit! Hats off for the mechanics!

[@bromdulasta]

Obet - Captain, Spokesman, Educator, Trailblazer!

[@mysticrain4all]

That’s a very good one.... this is massive men. ..weighs tons.

[@valterp528]

Great vídeo

[@manojmadnani4827]

Hard Work,but necessary for safety Looks like a piece of cake with proper tools/equipments used by professionals Best Wishes Always for your hard working maintainance staff 👍👍👍👍💐💐💐💐

[@sceptre1922]

I miss those days. My last plane was Boeing Charleston, SC; B-787 Flight line.

[@peterbrown6224]

That it utterly amazing. Tough profession, doing this.

[@jeanhuysse1227]

Very interesting Captain! Thank you very much for show!

[@apuwdm2]

Amazing video. Thanks for sharing.

[@fabiofabulous]

Thanks for sharing !

[@mavi_izmir]

Awesome, I didn't see it before. Thanks a lot, Cpt.

[@robinfist]

Great video Obet. One of my favourite channels to watch. Great upload.

[@pilot_obet7815]

Thank you😊

[@doinjusfine1]

Good video..

[@decimal237]

Top top content. Thanks Captain !

[@ATMAtim]

Excellent video!

[@onur-vp7ek]

Very nice captain thx

[@SurnaturalM]

The 4 Bolt holding the jack wheels are strong.

[@subthermosphere]

Amazing video, cargo flying and flying the 747 looks very fun. Have a good Christmas, and stay safe

[@lorenzodallavalentina7851]

Fantastic job and nice video! Shared on my FB page "Boeing 747 The Queen of the Skies" !

[@MichaelDouglas-24]

This makes me glad to only be working on cars lol

[@RedLP5000S]

God Bless the Queen of the Skies. ✈💙

[@jozekpusnik4868]

Amazing💪👏

[@adolforuiz3723]

Excelente 👌

[@abdurrehmankhan4605]

After installing the brakes you need brake bleeding for removal of air bubbles from brake assembly pistons if air bubbles exist your brake response may be sluggish.

[@marxxmann8758]

I love all of your videos had to subscribe to the channel its really inspiring me to continue my part on aviation as im just about to enter flight school in a few months

[@pilot_obet7815]

Thank you and sorry for late response.

[@marxxmann8758]

@@pilot_obet7815 you're welcome anytime brother

[@moriver3857]

Been there, done that dozens of times. Not a brake pad, rotors and stator. Aligning the wheel to the loose rotors, is the real work, and hardest part. Easy, once you know the tricks.

[@70slandshark47]

Your right and they left out a few steps,, remove the hydraulic system head pressure, now remove the brake hyd. line. Reconnect it and bleed the brake. Also apply fresh grease to the wheel before putting it back on. Torque the nut and reconnecting the transducer. Did I miss anything, LOL

[@moriver3857]

@@70slandshark47 Those have QD couplings similar to air compressor hoses. Head pressure, yes but no bleeding of brakes to do. Still, Skydrol, though. Tnx!

[@70slandshark47]

@@moriver3857 Thanks for the update, I am retired now so it's been a while,, I worked on the older Boeings. I do not miss the Skydrol LOL.

[@125brat]

Did you use a spider to align the segments then apply the parking brake, or just carefully spin the wheel to pick-up the slots?

[@moriver3857]

@@125brat No. Simply align the slots at 12 O'clock, with the wheel dolly align the wheel so it would rest on the 12 O'clock slot with slight weight on it, then by pushing the top, the wheel tilts and slides in. Slacking the weight in the slot, causes the rotors to turn. Takes a bit of practice, but works. Of course with the spider is easier because you can lock the brake once aligned. In 18 years, never used it. From DC9s, DC10s, 767, and anything in between.

[@AluminumOxide]

It’s amazing to believe how incredibly strong those tires are, they can withstand up to 800 psi of pressure (390 kg per square inch). Normal pressure is 200 psi

[@TRPGpilot]

KG per square inch? Are you having a laugh or are you being deliberately obtuse? It is KG per square centimetre . . .

[@pilot_obet7815]

Yes they are several ply and a lot of strengthening in their manufacture. I toured the tyre factory a few months ago- impressive

[@noonenone1205]

@@TRPGpilot Français: PSI, pressure per square inch

[@125brat]

It's actually bar, kgf/mm ^2 or even hectopascal.

[@noonenone1205]

@@125brat 🤭🤭🤭

[@halmain4468]

Make sure all the airplanes have a new tire and brake put on

[@dindzbartolabaciii8738]

Its me sir obet doing the brake change u video

[@pilot_obet7815]

Cool

[@DeezNuts-uk7xz]

Hope you had a good Christmas

[@seadeer923]

Interesting

[@chris-vn6sw]

👏👏👏👏

[@donalddavis581]

Looks like the first time they have ever done that....

[@pfsantos007]

I have to tighten the wheel on my 747. What is the torque spec of the big nut?

[@badiskebsisi6541]

You forgot the OPS test And the leak test 🤣🤣🤣🤣 captain, you have nothing to do there

[@piotrmkg]

Breaks don’t need bleeding?

[@davejew01]

Anyone have an idea or a guess as to how much that unit costs?

[@RidwanMaulanaFirdaus]

excuse me, may i know what the name or brand strap did u use for lift up the brake unit?

[@pilot_obet7815]

I’ll check with maintenance

[@RidwanMaulanaFirdaus]

@@pilot_obet7815 thank’s before sir

[@AbcAbc-ox6pg]

I wonder if the brake unit is part of the actual wheel bearing? I mean on the back side of the wheel there is no bearing visible, only the big hole for the brake unit.

[@fasteddie9475]

The wheel holds the brake to the axel, the wheel inner bearing is retained in the wheel via a snap ring, only the outer bearing is removed for replacement.

[@90210146]

Why didn’t you show the removal of the new brake unit from the box?

[@fredweather3366]

Probably because it was sketchier than the installation!

[@herzglass]

Thank you for the video! Intresting as always. I feel they could've made it a bit easier for themselves, laying down the belt centered and then tilt the break unit onto it, close the belt, then hook it up. Also, why not immediately move the lift away after the wheel is in place? I am no expert for sure, but it all seemed a bit uncoordinated to me.

[@ATMAtim]

There's always an expert among us.. 🙄

[@herzglass]

@@ATMAtim It's the German inside me. I like efficiency.

[@Boze0415]

Awesome awesome VLOG. Question, are the brake wear indicators required to be checked during the the pilot’s preflight walk around or is it performed by a mechanic? Really enjoy your informative videos. Thanks for taking the time to teach because it really helps guys like me who fly only the computer flight simulators. 😎 Stay safe and God bless.

[@pilot_obet7815]

Hi- thanks. Yes we do check them but the mechanics do too.

[@peanuts2105]

Engineers check them because you can't trust the taxi drivers to spot them

[@roconnor01]

We, know they're brake pads,we heard you the 6th time you said it !!

[@pilot_obet7815]

Sorry for the repetition 😊life isn’t that serious people ….breathe!

[@kellytkachenko]

7:05 there is crack in on the shaft

[@marin5381]

All Bridgestone tires?

[@pilot_obet7815]

Yes. Our Airbus fleet are equipped with Michelin tyres.

[@ilya.kortev]

Can you please tell me what type of bearing uses?

[@125brat]

Usually they are taper roller bearings.

[@ilya.kortev]

@@125brat Thanks, that's exactly what I thought.

[@jurrien75]

Did they let you do the torque?

[@pilot_obet7815]

Nah! I was fine watching 😊

[@superskullmaster]

Everyone had a role, and further more he can’t legally work on the aircraft.

[@jurrien75]

@@superskullmaster He’s not allowed to sign for the brake replacement of course but some ( supervised by the B1) assistance would be permitted.

[@MegaJohnhammond]

i hope i never have to fly on a plane that these hacks worked on

[@user-nl2zw8uy2x]

Haeco mah 😅

[@cusoonmyfriend3738]

spoiler alert ! 01:19 you will fucking get scared

[@ilya.kortev]

If you put it on a car, it will probably last for the rest of your life. 🙂

[@steveb1739]

Actually, I would be extremely unhappy with this rather ham-fisted undertaking. The mech opened the valve on the caliper assy. hoist too quickly, and dropped the caliper assy. onto the stub axle - possible stress raiser there. Same with the wheel assy. - crashed into the brake assembly. Although not an issue really, the chap with the socket allowing it to slip on the nut causes the corners of the hex to round. 99% in aviation doesn't cut it, it has to be 100%.

[@silviakarpati8531]

And possibly damaging the threads as well

[@pilot_obet7815]

Cool…is there anything you observed that was done correctly that you liked?

[@arnenelson4495]

I noticed that too.....

[@steveb1739]

@@pilot_obet7815 Dear Captain Obet. Yes, they did have the correct tools at least. I just wish they were more careful with your aircraft. Safe flying brother, hamba kahle!

[@pilot_obet7815]

@@steveb1739 thanks- I only asked you because…criticism is easy. Constructive is better…so, thanks😊