I did aviation maintenance in the US Air Force. You don't skip steps, cut corners or ignore problems. If you do things can go wrong and people can die. It's very exacting work that requires a high level of patience, care and craftsmanship.

Thank you to the owner for letting us see it! That was fascinating.

Your comment about not maintaining but overhauling was inspiring and memorable

I can't believe the customer didn't choose Hot Pink when they had the chance

You know you’re cool when you get excited over engine paint.

“it looks like ...well...puke”... agentZ your choice of words are precise, as usual...lol Great vlog...

Thank you for entertaining with such zest, you never let us down and this was another fascinating angle of your experience!

I met some people at CAD school who made air cleaners for military helicopters used in desert storm. The engine life average was 12 hours for turbine engines in that environment without there air cleaner.

I enjoy your videos. You always thank us for watching and I thank you for sharing. Have a great Sir 😎👍

That thing was chewed up. But you caught it in time. Can't wait to see it run again. Thanks for sharing and have a fantastic day!

Love the diagnosis! Great video

Trying to put this in perspective I am familiar. I have been around heavy trucks and equipment all of my working life (I'm 70 now) and continue to this day. I have ran my own equipment and have been responsible for the equipment of large operations. With that in mind let's say a normal PM interval beyond lube/oil/filter would be tear the entire vehicle down to its core components and rebuild. Expensive proposition these jets ;) EG. Jet at 500 mph * 1,000 hrs = 500,000 miles. I once ran a truck shop that serviced trucks running 24/6 or about 500,000 miles per year = complete tear down and rebuild?

As always... Thanks for keeping up the great content.

its a treat to see the tip of the iceberg of your intellect. thank you

Surprised the compressor didn't have a vib issue.

Custom colours! Fantastic!

Maybe those little free bits of balance weight were part of the 'secret' auto balance system? ;) Good call to replace as you describe - safety first. loved the vid - thanks.

Weights bounced around like the marble in a roulette wheel. That's a $200,000+ fix.

hard to believe that you have engines around 30 year ish old or older in your videos. Damn the engineering of those machines!

Nice to see this kind of footage featuring the damage of gas turbine engine. I ve earned the aviation mechanic license couple of years ago and i m still working in this field. This gives me reminding of the time when I encountered birdstrike for the first time.

8:24 "Neon pink, and it should look like a rainbow when its done".

"Beige yuck" "Thrown up vanilla milkshake " Very interesting way to describe colors.

Your mid frame is beautiful, love the color!

Beautiful paint!

In my opinion, I think you should.... keep giving us more great videos! ;)

borescope holes and inspecting are great as is vibration analysis . we caught several probs that way. even sound emanating from gearboxes

Thanks for sharing!

Glad they decided to replace. That disc looks like someone with a shotgun decided the world wasn't big enough for the both of them. I'd be concerned if left alone (minus the loose bits rattling around) eventually any damage would propagate far enough for catastrophic failure. Curious as to how many overhauls they've skipped during the life of the engine that might have saved them some grief with FOD.

Good catch !! Or intuition ! Believe it or not I have had this happen a hand full of times in my life. After working on so many different things over the years and for some unknown reason you go just a little deeper into it for no reason and find a flaw. Like in your case you saw flaking of paint but maybe subconsciously knew something wasn't right so you disassemble further and you found a huge problem ! Most likely preventive catastrophic failure !! It might cost more money but what good is money if you are dead because you went cheap on a engine build.

On anything mechanical it's so nice to work with clean, painted parts.

Can't wait to see this on the test bench running 😁

Option #4. Realize that like a boat is a hole in the water into which you pour money, a vintage fighter jet is a flaming hole in the sky into which you pour money - and sell the plane to some other sucker.

thank you for the videos

Thanks for sharing.

20hp+ just from the color :D

My thoughts on the paint is it's probably from an era when ceramics were a new(er) material in paint, and the puke beige was the natural color of the ceramic material used to give the paint it's heat and corrosion resistance characteristics. Material tech (especially ceramics) has come a long way to "what color do you want". This was an interesting one. I'd guess all the damage was from spin up and down, and can't imagine how long it took. Thanks to your customer for the look inside, and thanks AgentJayZ for the story. It seems to prove the "overhaul when ever apart" philosophy - or least strip and inspect when apart. It's kind of unnerving thinking excepting for some peeling paint, that might have been back in service unseen, and probably damaged the new parts fairly soon. Knowing how careful you folks at Jet City are, I'm thinking you would have heard it whilst turning the engine or inspecting during assembly. If it made past assembly, would it show on instruments during the test run?

It's cool how you're concerned with the color(s), me, personally, I'd paint is some bright color. Red, bright green, yellow..something like that. Silver, while it can be cool, it's not like *_RED._* I love getting to play with colors with my beehives, two of my favorite passions, color & beeees.

Charcoal Metalic /super color,I've painted miles of balcony railings in that color/ powder coat of course.

that color is awesome

I couldn’t imagine getting that far into an engine and not replacing every bearing period. No matter how they looked or felt. Love your videos otherwise.

Greetings Jay! You have discovered a conundrum: If the pieces causing the damage are from within the engine, is it 'foriegn' or 'domestic' damage? I reckon the objects became detached from their places & went where they do not belong, so maybe they are foriegn to the compressor! Wait, what? Let's ask Graham about this.... thanks for sharing these experiences with us. Cheers! DD

Yea I'll take the vanilla milkshake vomit color please. Engineers are not salesmen.

ENJOYED !

Excellent color. He's going to get back to you to paint all his landing gear parts to match, ya know..

I would love to see how they are balanced. Any chance we can see it in a future video ?

You should try cerakote for hotter components it can withstand 2000C works great for turbo manifolds for sure.

I am so glad i stumbled on your channel, you put i smile on my face although i don't understand shit about jet engines i do like planes, i have subscribed and put on the notification bell.

Greetings from Rome’s Fiumicino Airport, where we’re waiting for our onward flight to Sicily for a week’s sailing. There’s a good chance that we might see Stromboli erupting. PS We could see it in the distance, with smoke rising from it. PPS We sailed (or rather motored) out to Stromboli on Sunday, to see the fireworks of its eruption that evening after dark.

Balance weights. I thought they were bullets at first lol. Still kinda look like that.

My goodness that damage is bad ....really bad!!! Now i understand why overhauling of jet engines is so immensly expensive

Pimp My Turbine Engine starring "Heatilon" Jay Z :) It looks much better in that color Jay, nice work. Thanks for the video!

Are new parts for the Saber type engine still being made by the manufacture? If not, how do you get airworthy parts?

WOW that is crazy. Does not take something very large to thrash things at speed.

What ever happend with the X-116 engine? Was it completed? Has it run? What's missing?

Love all your videos mate yew. So how dose the balance waits get attached? I'm guessing glued or crimped to the truck they sit in or both?.

I don't know the engine but a few questions come to mind: Is that square profile ding in the vane root about the same size and profile as the edge of a balance weight? How are the balance weights held in? Any previous history of balance weights letting go on this or similar engines of same make? Are all the hub tie rod split pins intact? Any missing rivets from upstream, core, static parts, if there are any?

its Girly Girl Jet Silver!! LOVE IT

So I guess the natural sound of this engine spinning up would drown the rattle of the weights!? (before their speed matched the compressor, they definitely wouldn't stay put when the RPM is changing!).

Is there any air from the compressor going through that area? That would cause them to move around a lot, or at least enough that the weights that broke free could be punted around when the contacted the walls. Either that or the balance weights coming loose are a symptom of something else getting in there and tearing it up, like someone forgetting a tool or a bolt that was gradually digested over time.

9:44 For sure 100 extra hp right there!

A video is indeed worth a million words. I feel like the customer has made a wise decision to replace the damaged parts. Looking forward to seeing it in your spiffy new test cell!

Do the tips of the blades touch the case when imbalance like that happens? Noise? Buzzing?

That is known as 'Institutional' color. It is bland and drab and won't offend anyone important.

Those free weights remind me of my motorcycle tire bead weights that just sit inside the tire and automagically balance the tire once it's spinning. I wonder if a similar effect occurred here where they settled at their natural balance point while causing a bit of friction damage along the way.

Won't those scratches affect the disc integrity? Start cracks?

Just recently, a commercial jet plane had to land before reaching its destination. Smoke in the cabin. Oil leak in the compressor section getting into the AC. In this video you mentioned the seal(s), but i did not see anything that looked like a seal. Is there a single seal at each end of the engine to keep the bearing oil in the center of the engine?

In the very beginning you show a compressor stator vane which has a nick right near the base of the leading edge, and you say it's not fixable. Granted, it's a stress concentration and it is close to the base, but why is this not fixable? When this happens to blades, I get it: blades operate at high rotating speeds and experience huge tensile loads. But compressor vanes are stationary, so I would assume the fixable damage threshold can go a bit beyond what is accepted for blades. I also don't think you would waste fixable parts for no reason, so could you please explain where I'm wrong?

¿What's the material of that disk?, is it titanium, titanal or plain old steel?

Might the wear be causd by startup and spindown ?

I looked up some sales literature on the GE LM line of gas turbines to get an idea of the service intervals required. Specific references were made to 25,000 hour intervals for hot side components and 50,000 hour overhaul. Do you reblade the turbines after 25k hours? What happens at 50k hours? GE quotes up to 99.5% availability, sound about right based on your experience?

Perfect

Would you even be able to thread the tool on to pull those two sections off with the threads in the condition they are in?

Would the floating weights balance the compressor like adding sand to tire? The damage could be from starting up and changing speed, but once at speed they'd stop moving.

Agent JayZ, I know it has been a while, glad to see your dream taking off. Sorry to the S&S guys for the loss with the NAE, but that’s not for this purpose. I was going to say Bal trim weights or a lock ring just off first observations. At P&W our HPC locks (modern commercial type) now have a stand off that keeps the weight loaded, however the star bit required is microscopic and we break them all the time. Cheers From West Palm Beach.... P.S. Warbirds.... fuck yeah. If you ever think about coming to Sun n fun, me and the wife will treat you to dinner. I will send you my email.

Never heard of a colour being described quite like that. But I know the colour you're talking about, so....I got nothing else to say.

Paint the engine in light colors since it will show any leaks and faults better than dark and black colors.

Fab indeed.

Heck, I would pick BRIGHT RED or BRIGHT YELLOW!

How many engines do you think you guys rebuild in a year?

Did you FPI that disk?

Talk about a roulette wheel!!! That could be a big loss!!

These are views that the average passenger will never get to see. There are always planes in the air with damaged or defective parts and we may not know about it until it's too late . . .

I think you have a vibration sensor on the test stand. I presume the manufacturer gives you a base vibration number, if it was higher than the base value would it lead you to think the fod was still in the engine?

Awesome is right!

LOL...reminds me of the very first F414 sent to test... an engineer left a wrench in front of the test cowling and it got sucked inside... made for Every GE mechanic losing personal tool boxes. All assembly got blamed for someone who didn't even own a tool. We also had a woman management loved because she killed the times on jobs.... she left her socket wrench in a CF 34 LP module ... only found on regular tear down cycle..

Talking about compressor damage. GE9X have some compressor problems. causing Boeing's delays Do you have any opinion about that

Looks to me like it may have ingested some sand/small pebbles.

Holy Cow, is that the most damage you have ever seen? Could you tell us about the worst damage ever?

if it was my engine. i would ask the mechanic what would you do if it was your engine? i find thats a good way to do things if the mechanic knows more than i.

I wonder if when the aircraft did a sharp maneuver the pieces would move and eventually settle again. I'm sure they would heat up significantly too depending on how long they tumbled.

these are 20 mm or 40 mm sparrows?

Wanna hear a funny bearing story? I had this tiny trailer (Dilly) for a sunfish sailboat. I build a wood platform on it to pick up a little plane (N3 Pup) in Atlanta (I live in Austin, TX), about 1,000 miles. Just outside of Austin, I stopped and ate. I noticed one bearing dust cover had popped off (I had just repacked them). Dang it....so, as a temp fix, I got a plastic cup, cut some vertical slits in it and rubber banded the sucker on. This dust cap worked all the way from Austin to Atlanta & back!!! Regardless, I'll repack the bearing and order a new dust cap, but I thought the plastic would have melted, but turns out the hubs don't get very hot, barely warm even! Still....a clear plastic cup as a dust cap worked...har har.

How many hours between overhauls for your car engine?

Since the balance weights are designed to be in the “wheel area” wouldn’t it be “Loose Body Damage” rather than FOD? Now on through the rest of the turbine path yeah, FOD for sure. With LBD the root cause is typically addressed in the area of ensuring the design fit and locking the position of the weights when installed per OEM specs.

How can l design inlet duct for Small Turbojet-engine

Thank you AJZ. Sabre - they were to-- Edit - The cats meow, in the day! lol

3 Options? No 4! No-one expects The Spanish Inquistion.

8:51 If only prosthetic limbs come in that colour !

I would go with option 2 or 3. Leaving it may cause the remaining balance weights to come loose causing more damage. that set of "rails" the balance weights sit between appears to be thrashed to hell. I would not trust it's structural integrity.

The blancolirio youtube site just reported that excessive wear of GE9X engine stators is the major reason for the Boeing 777x delay. GE has not been specific about the exact nature of the problem. Are dimensional checks of compressor blades and stators part of the overhaul process for the engines you work on?