UAL flight 328

21 Th02, 2021
49 614 lượt xem

Observations of the video available showing the engine failure and fire aboard United Airlines flight 328 on Feb 20 2021.
From the point of view of an engine guy.
Here is a link to P&W's page about this engine:
Here's an operating manual for the P&W4000 series engines for pilots:
The Turbofan design engineer referred to in the video is my friend grahamj9101
When the final NTSB report is released, we will see how close or how far off the mark I really am.

  • 11:18 "I gotta say, the journalists know nothing. They don't know anything." Yep, that about sums up today's media.

    SIE44TARSIE44TAR15 phút trước
  • Great analysis JayZ. Good Job. I agree with everything you said. Retired airline pilot here. This was a textbook simulator event. We would train for this type of event every year. The weather was good. It was daylight. Great airport, Aircraft, ATC and well trained pilots.

    yankmyfingeryankmyfinger46 phút trước
  • Where did the missing 1½ fan blades go after leaving that cut in the front air inlet ring..

    Nicholas PrattNicholas Pratt46 phút trước
    • Speculation is that one blade cut through the front cowling (large diagonal slash) which then accelerated that separation as an intact piece. Will be interesting to see where and when the blade fragments are found. 99.9% contained is probably the more accurate assessment if 34lbs of carbon and/or titanium exited the front on the way down. If blade is rotating at 600 mph and plane is flying 200 mph then the odds are higher that the blade will go forward at that point in time. But what do I know?

      Robert SluggRobert Slugg15 phút trước
  • Excellent commentary and analysis, Agent JZ! Nice to hear some logic after all the nonsense expressed by the fake news media and other so- called aviation experts!

    supercat380supercat38047 phút trước
  • BRAVO, this is why I follow you and Blancollrio. Keep up the GREAT work!

    paulsautocmpaulsautocmGiờ trước
  • Excellent video, keep up the good work. So nice to hear cool calm engineering facts. Ive been an engineer working on PT6 TPE-331 and CFM56 for the last 33 years. This is a bit similar to the Southwest Airlines 737 incident in which the tremendous energy from the contained engine failure caused the cowl hinges or cowl latches to fail, thus causing the cowl to break up and separate from the airplane. Most people don't appreciate the amount of energy involved in a broken fan blade. In both the Southwest incident and United 328 incident the engine failures were contained. Well done to the boys who designed the debris containment shield-it worked as advertised.

    Rocco SoundRocco Sound3 giờ trước
  • How many engine hours on this engine or the fan would be more important because that seems to be the actual failure. More importantly probably landing takeoffs would give more insight I’m sure the experts will figure this out and make a correction. I am a mechanic as well, think about the load on that blade when the engine is nearly full thus going down the runway.

    Brian WhippenBrian Whippen3 giờ trước
  • Is that Moldovan flag?? Surprising to say the least!

    a4ystera4yster4 giờ trước
  • According to Blancolirio, the 1/2 blade was found inside the compressor stage. The complete blade is still MIA.

    Armorer 94Armorer 945 giờ trước
  • Calm , lucid , sensible facts .. thanks :)

    android emulatorandroid emulator6 giờ trước
  • Was that a JT-8 C-2 Fan disk that you had leaning their on your right

    William PickettWilliam Pickett7 giờ trước
    • RR Spey

      AgentJayZAgentJayZ14 phút trước
  • Jayz ... what engine behind you ... very interesting ... does it P&W J75 ... (just guest)

    yxvpjsyxvpjs8 giờ trước
    • Orenda 14 out of an F-86F Sabre / Canadair Sabre 6

      AgentJayZAgentJayZ9 phút trước
  • I would NOT like to be the guy who signed off on the last fan inspection when the FAA comes knocking.

    Android811Android8118 giờ trước
  • Thank you for putting the truth out, I just wish people or the human condition would allow people to believe it. I've seen you stand up for what is right over the years and I think you for it. People really need to question everything and not believe the first person who opens their mouth or speaks the loudest. Truly an unbelievable job you do to disseminate knowledge. 👍 Juan Browne or, blancolirio is great at the other part of aviation just as you said.

    mer8771mer87719 giờ trước
  • One blade or part of coming off the fan disk and causing the damage that it did is by all technical definitions, an uncontained engine failure. It's not drama, it's a simple fact.

    First LastFirst Last10 giờ trước
    • The strict definition of an uncontained engine failure is that any debris or engine parts that fail penetrate the protections and exit through those protections. Simply put, the engine's cowling cannot hold the parts inside, does not contain them. A part that exits through the back of the engine for example, but didn't manage to open the protective rings is still considered a contained engine failure. Same if the part got stuck on that protection but didn't exit through it. The engine covers you see from outside don't count for that definition, they're mostly there for aerodynamics reasons. If it does whoever open up a hole through it, that in turn is uncontained. The definition itself can only be properly applied after inspecting the engine tho, from the angle seen it could very well have been uncontained if there was a hole open on the side not seen by the passengers, tho there wasn't thankfully. AgentJayZ could have been far more helpful on the reply tho no doubt. just that whole lot of "ignorant" there helped literally no one. If it was well defined on the the video, a time stamp would be enough. Otherwise, just copy and paste the definition also works.

      KalvinjjKalvinjj3 giờ trước
    • You are completely incorrect. That is forgivable because there is a very strict definition of uncontained, of which you are completely ignorant. FYI : on Feb 23 , the NTSB described the failure as contained. So you are doubly ignorant. Put that on a sticker, and have a grown up stick it on your back. Then go away. Thank you.

      AgentJayZAgentJayZ10 giờ trước
  • “The engine exploded” direct words from news outlet.

    TransitBikerTransitBiker11 giờ trước
  • Wanted to share this as a pilot spoke on the same incident from his perspective.

    Brother MalachaiBrother Malachai11 giờ trước
  • I love it how boeing's stock took a hit yet Boeing doesnt make engines,.... Stupid public!!!

    mikoyanfulcrum1mikoyanfulcrum111 giờ trước
    • That's a buying opportunity!

      Android811Android8118 giờ trước
  • When the investigation report inevitably comes out, can you come back and comment more on this incident from an insider's perspective?

    Brother MalachaiBrother Malachai12 giờ trước
  • Journalists over reaction is so sad. Love you guys always!

    Mark GrantMark Grant13 giờ trước
    • Journalists are going to muckrake. "If it bleeds it leads."

      Brother MalachaiBrother Malachai12 giờ trước
  • Thanks AgentJayZ, always glad to learn from you. Can you do a followup on this once they have the whole story?

    BMachine2BMachine214 giờ trước
  • Thanks AgentJayZ for posting this!

    fzj801996fzj80199614 giờ trước
  • I'm an aerospace technician with approximately 7 hours of experience watching turbine engine videos and I have conducted my own investigation of the incident and I have concluded that the engine went "kaboom", not the "Big Badda Boom" as reported in the media as there were no burn marks on the wing and apparently no holes in the fuselage as the passengers were able to video the wobbly smoldering engine. I also believe the engine is not shaking due to imbalance but it is in fact shivering due to it's clothes being ripped off in midair in subzero temperatures.

    Cheezy DeeCheezy Dee16 giờ trước
    • That's pretty weezy, Cheezy Dee, but I like it! We could use someone like you, to translate between shop talk that the people working on the engines use, and whatever flavor of double-speak garble that management uses this year. "moving forward" I'm barfing now...

      AgentJayZAgentJayZ15 giờ trước
  • Really glad you got that off your chest Jay :D

    Steve RobertsSteve Roberts16 giờ trước
  • This is not the first time these engines has failed . Next time it can be worst . I believe the FAA put a service warning out on these engines.

    Jaja JajaJaja Jaja16 giờ trước
  • Love the engine vids thanks for explaining.

    Luk SLuk S17 giờ trước
  • With this much sensationalism, imagine what would happen if there was a pandemic!

    theonlyaritheonlyari17 giờ trước
  • Like you said: could have been much worse. Sometimes things work. 👍🏼🤠

    A MasciaA Mascia18 giờ trước
  • Vibration causing the cowl separation is more credible than the intake cowl being sliced off by a bent blade. Should the engine have been shut down earlier when excess vibration noticed as this would have saved the cowls.

    DJDJ18 giờ trước
    • @Max Canine I think Juan is wrong about this. The outward centrifugal force on a liberated fan blade is much, much greater than any aerodynamic force - it goes directly into the containment structure. In fact, you'll notice that the kevlar blanket is offset a bit aft of the plane of the fan - don't know why, but that's where the engineers expect it to go. Perhaps the following blade pushes it aft. The busted upper half of the other blade - collateral damage - might be different, but I don't see how. In any case, the 'slice' (not necessarily a slice) in the nose ring might have occurred in several other ways. After all, it fell a long way, then hit a pickup truck!

      Curt AustinCurt Austin5 giờ trước
    • Intake cowl was sliced by the departing fan blade. See blancolirio website and see photos.

      Max CanineMax Canine9 giờ trước
    • The vibes were caused by the fan blade breaking. Before that happened, I'm sure the vides were normal.

      AgentJayZAgentJayZ15 giờ trước
    • You weren’t there so you don’t know when excess vibration occurred in relation to the cowl separating.

      B BB B17 giờ trước
  • Nice report, very interesting. I love your delivery. We all do!

    MrSwimfinz123MrSwimfinz12319 giờ trước
  • One news reporter I listened to, based on some ATC exchanges, reported the pilot saying “... heavy engine failure...” Of course this was the pilot identifying himself as “328 heavy.”

    Earth Wisdom ProductionsEarth Wisdom Productions20 giờ trước
  • AgentJayZ: What is your take on the photos of damage to the fuselage adjacent to failed engine? Caused by broken fan or turbine blades?

    Darcy HildebrandDarcy Hildebrand21 giờ trước
  • I saw photos of a large hole in the wing root area underwing section right up against the fuselage. It looked to be about a foot by 2 feet in length. Also, the flight crew can make the Mayday call to ATC and later downgrade the emergency claim. So the pilots telling passengers that they are not in an emergency..I.e. not expecting aircraft loss/further damage or passenger loss..may very well have occurred

    Master WarningMaster Warning21 giờ trước
    • My bet for that hole is likely that engine cover being torn off and ripping through that part. Thankfully no hydraulic/electric lines ruptured that affected enough on the flight controls.

      KalvinjjKalvinjj2 giờ trước
  • It is amazing to me that engine pylon DID NOT fail. And, it was able to withstand the immense torque generated by the inbalance.

    Steve FlorSteve Flor21 giờ trước
  • Looked like the fan blade may have cut the forward cowling/shroud detaching it and the fan blade went out forwards (perhaps a combination of pressure and momentum from the collision.. Doesn't that make it an uncontained failure even if not a whole disk? If all the fan blades are generating pressure aft doe it mean that one blade can be blown forward by the pressure generated by all of the others?

    Mike MMike M22 giờ trước
    • the thrust from the blade itself would just turn it sideways to the position it encounters equilibrium, and then the air around (and suction from the rest of the engine) would just push it back. An entire fan disk failing without losing it's round shape, still rotating (let's say, it detaches from the shaft clear) might propel itself some amount, but if that is enough to maintain it going forward after no torque is applied to the shaft (if it fails of course there won't be any), I would say is unlikely on flight conditions, on ground tests it probably can propel itself some amount but not with the airspeed they have up in the sky.

      KalvinjjKalvinjj2 giờ trước
    • @Njål Nilssen Have done. But with one and a bit blades floating around at high speed they could hit the wall and at that speed with leverage I could still see bits going forward. The witness marks on the cowling will be interesting.

      Mike MMike M17 giờ trước
    • Angular momentum force trying to pull the blades out radially are ten-folds higher than any foreward momentum provided by thrust. If in doubt watch videos from "blade-out" test done during engine trials.

      Njål NilssenNjål Nilssen20 giờ trước
  • I learned more from your video in three minutes then anywhere else. Also you are very funny which helps.

    Justin SimonsenJustin Simonsen23 giờ trước
  • Looks like some parts did get through ..........

    Craig TripneyCraig Tripney23 giờ trước

    Craig TripneyCraig Tripney23 giờ trước
  • how much does a jet engine overhaul cost?

    that guythat guy23 giờ trước
    • Depends on the engine. One of these commercial airliner engines will cost many thousands of worker hours and likely a couple million in parts.

      AgentJayZAgentJayZ21 giờ trước
  • Why do people listen to the media at all anymore? Has the media done anything you useful for like the past 20 or 30 years? We need new media, old media is dead.

    T4L0N57T4L0N5723 giờ trước
    • When ratings, clicks and views are what generates revenue, the truth is the first casualty. What passes as “truth” now has more to do with who is paying for it than any actual facts or reality.

      James GrayJames Gray17 giờ trước
  • seems like there have been several "lost shroud" exposed engine failures in the past few years

    None NoneNone NoneNgày trước
  • Understand that there was another failure in the Netherlands Same type Go figure

    Karl GoebelerKarl GoebelerNgày trước
  • The nacelle seems to have been sliced by the blade, whether that was the prime reason causing it to depart... ? Titanium shaft? Blanco was also saying that possibly some of the fire containment system might have gone for a walkie with the cowling (?)

    KosmonooitKosmonooitNgày trước
  • Sadly, for news reporters, it doesn't really matter what is real, it only matters what people will believe and what will keep the advertisers happy.

    David ClawsonDavid ClawsonNgày trước
    • That is a really really broad brushed statement. It basically throws the entire trade of reporting right under the bus.

      Mike EarlsMike EarlsNgày trước
  • Awesome stuff AgentJayz!

    Christian CormierChristian CormierNgày trước
  • Yo, dude . . .! At 2:42 you say "one and a half fan blades have broken off", but at 2:24 you say "the engine is all there". Not to split hairs, but aren't those fan blades part of the engine ??? There are also a half dozen contradictions throughout your presentation that indicate to me, that you're not being entirely accurate in your description. Semantics ?

    New RepublicanNew RepublicanNgày trước

    • @AgentJayZ Very well said. Thank you once again...

      Ken HildebrandtKen Hildebrandt16 giờ trước
    • Ahem... What I was saying was all the major engine assemblies were still there, where they were supposed to be. So anyone who said the engine "exploded" did not know what they were talking about. I still say that. Also, there not being any huge breach in any of the engine cases, this appeared to a contained engine failure... meaning that any fragments that broke off the rotating machinery did not escape the containment of the cases. Your semantics are both vague and unnecessarily pedantic. Your three question marks detracts enormously from your credibility. I don't care what my presentation indicates to you, as your level of understanding of the issues is insufficient to allow you to make a valid contribution to the discussion. You had an opportunity to learn here, but you chose to judge in ignorance, and to complain. It happens a lot on this channel. A lot of people like you are uncomfortable with changing their limited understanding of the world through adjusting to new information.

      AgentJayZAgentJayZNgày trước
    • @New Republican the engine is the turbine while the blades which broke are of a large fan, ie the whole is a turbofan. just like an electricity power generation is composed of a gas turbine engine and of a large generator. two separate parts joined together

      Brendan CooneyBrendan CooneyNgày trước
    • @Brendan Cooney Semantics, dude . . .! If the fan blades, compressor blades, shaft, etc are not part of the "engine", then what exactly IS the engine . . ., and what constitutes its failure ?

      New RepublicanNew RepublicanNgày trước
  • Thank you for sharing your expertise. Engineering is always an interesting topic.

    Charles BartholomewCharles BartholomewNgày trước
  • I've heard reports of passengers hearing a "bang", do you have any ideas what that could have been?

    Blockstacker561Blockstacker561Ngày trước
    • A fan blade on that engine probably weighs 40 or 50 pounds and is travelling incredibly fast as it spins. That amount of kinetic energy suddenly being unconstrained would probably make one hell of a noise.

      Brian AllemanBrian AllemanNgày trước
  • Agreed that the blade containment system behind the fan did not release engine components, but that’s not the whole story. It seems that a fan blade failed, left the engine and cut the leading edge trim. The trim then left the aircraft, exposing the cowling behind to the airstream, and that cowling also left the aircraft. Is this an accurate description, going by what is seen on photographs of the leading edge trim? If so, does the damage to the aircraft (the leading edge trim) by the failed fan blade constitute an uncontained engine failure?

    Billy SuggerBilly SuggerNgày trước
    • Blancolirio suggested that that the broken blade exited the front of the engine and caused the slash in the nose cone. I'm not saying this didn't happen but at high power settings, broken blades are normally ingested rearwards into the engine, not thrown out of the intake. The nose cone flattened the roof of a truck when it fell to earth and it may have been spinning. I'm more inclined to think that the nose cone damage was caused by impact after it detached and not by the broken blade. Either way, it's the NTSB investigation and FAA safety responses that matter.

      Graham HaynesGraham Haynes23 giờ trước
  • BBC News was reporting that the engine “fell off” the aircraft.

    Morgan WelkMorgan WelkNgày trước
  • Thanks for the excellent engine summary. It's good to hear it from somebody with the relevant engine experience.

    Graham HaynesGraham HaynesNgày trước
  • If they shut off the fuel supply why is the engine still burning?

    tom kenttom kentNgày trước
    • Possibly lubricating oil leaking from an overstressed bearing. I say this because it is a low intensity flame. Jet fuel burns a lot hotter. Wait for the report for more information.

      c7042c7042Ngày trước
  • Oh the wonderful truth-telling. media, they once put out a story that a girl drove 2000 feet off of a cliff and survived for 4 weeks with multiple fractures broken ribs and concussion sucking water out of rocks😂 and then taking selfies and smiling when she was found just a few miles from homes on a beach 😳🤣

    AL Dor for shoreAL Dor for shoreNgày trước
  • At least the engine didn't fall off like the American Airlines engine did in Chicago. Then the plane flipped. So there is a "good news" story in this event.

    Jim MorkJim MorkNgày trước
    • What I said: AA 191. Engine disconnects, plane flips on back. Faulty maintenance by contractor.

      Jim MorkJim Mork5 giờ trước
    • That was American 191, May 25th 1979.

      kimmer6kimmer614 giờ trước
  • Was about to ask if the engine was complete scrap or not, thanks for answering that.

    Harry KingHarry KingNgày trước
  • It's always hilarious to hear the media talking heads using terms they've never heard before, acting like they're experts.

    Dan WoodDan WoodNgày trước
  • I believe Juan said that the blades that detached traveled forward and ultimately caused the slice to the inlet lip. If that's correct, technically it was an uncontained failure because the blade(s) exited the engine

    Ja SoJa SoNgày trước
    • JA SO, nothing really wrong with your reasoning, but you don't get to make definitions up. All of the text books define an uncontained failure as one where pieces penetrate and exit the engine cases. This seems to be a rather special case where the cases were not penetrated, yet pieces managed to damage the aircraft anyway. The panel says: uncontained failure with an asterisk.

      AgentJayZAgentJayZNgày trước
    • Well it was at least an uncontained cowling failure.😎😎😎

      c7042c7042Ngày trước
  • NTSB preliminary hearing on the accident. It didn’t breach the containment ring. My bad

    FilthywingsFilthywingsNgày trước
  • Qantas 32 called pan pan pan, while they assessed indications, failures and remaining capabilities

    mightysprocketmightysprocketNgày trước
    • and I always thought Pan Pan Pan was the call sign for PanAM. I'll see myself out 😅

      j2simpsoj2simpsoNgày trước
  • Finally, someone who is making sense.

    Kali 808Kali 808Ngày trước
  • Best video on this incident.

    Brian KimmellBrian KimmellNgày trước
  • I am no expert at all, but does this look like a hole where part of what I believe is the thrust reverser is missing?

    Gary ManisGary ManisNgày trước
    • @AgentJayZ Thanks for the reply. I'm not sure where the contest or debate references come from. I'm just trying to understand what I'm looking at and you did put out a video attempting to explain what some pictures of the engine are showing. I appreciate your knowledge of jet engines, which is far greater than mine. That is why I asked the question. Thanks again for the reply and your educational videos.

      Gary ManisGary Manis9 giờ trước
    • Gary, this is not a contest, and not a debate. We all just want to find out the details. The tear you are looking at in this photo is the wall of the bypass duct. The duct, and the reverser are actually inner layers of the nacelle. In the description of this video I have placed a URL for P&Ws own cutaway drawing for the PW400-112... this engine. The outside of the turbine cases are not even close to being exposed in the photo you reference. I'm only here to share information. Some people call me an engine expert. Some call me unqualified and uneducated. I build jet engines for a living.

      AgentJayZAgentJayZNgày trước
  • This is a great analysis. Journalists don’t write or share the facts anymore. I am glad there are channels like this. I’ve subscribed!

    leetxjdleetxjdNgày trước
  • Captain Joe called it an uncontained engine event

    FilthywingsFilthywingsNgày trước
    • Good for him. Proves not everyone with a VIworld channel is correct, eh?

      Micah ButlerMicah Butler12 giờ trước
  • Greg Feith said this was an uncontained engine failure.

    FilthywingsFilthywingsNgày trước
  • Okay, now I have to speak up. Seen too many replies to this man's video from people who don't know what their talking about. First off this man's video is 100% correct. Engine pieces were completely kept internal as they are designed to do. Now from a professional standpoint, I am an x-Airforce Airframe repair specialist. All this "damage" to the main body of the aircraft from all the same photos you all saw were NOT from the internal engine parts. All this other damage was done by the cowling that shredded and came off. When you have all those exterior pieces flying around they will do strange things and they will move aft of the engine. A high speed blade would have gone nearly straight into the fuselage of the plane (some variance for speed of course) but my point is clear. If you do not know what your talking about from a professional stance then please stop posing as someone who knows it all.

    Lightpaws HirdLightpaws HirdNgày trước
    • @Filthywings Some of the cowling also struck parts of the B777 but as NTSB describes as just covers and it didnt struck any important parts of the wing structure.

      Lin ChesterLin ChesterNgày trước
    • But it DID go into the fuselage.

      FilthywingsFilthywingsNgày trước
  • Good job. I watch Blancolirio (spelling?) Juan...He certainly is the best. News Media never get it right.

    Kenneth BlackwellKenneth BlackwellNgày trước
  • I just saw new pictures of the aircraft on the ground, and there is lower fuselage damage near the engine. However, the damage is behind the plane of the fan - if the fan blades had penetrated the kevlar shield, they would have sliced into the fuselage near the forward wing root, not back by the landing gear.

    treborg777treborg777Ngày trước
    • @Lin Chester Bingo. Cowling may have struck the aircraft during/after detachment. Whether it be an engine part, or merely aircraft part that is normally fixed to the engine, if it falls from great height, it may create conditions inconsistent with ongoing life for organisms at lower altitudes. Perhaps there is a specific category of engine failure that causes aircraft component to detach, whereas "contained" and "un-contained" have very specific aircraft engine component related definitions. JayZ/Juan for the win!

      Leuven is a placeLeuven is a placeNgày trước
    • Some of the ripped off cowling struck parts of the B777 from the looks of it

      Lin ChesterLin ChesterNgày trước
  • The reason why the flame and blue smoke was coming out was solved.  very thankful.

    1epton1eptonNgày trước
  • 3,000 to 3,500 rpm at take off power sounds low.

    R LyleR LyleNgày trước
    • So vague. come on, man. Internal components... of what? Narrowing you vagueness down to a microscopic point... Of this model of engine? Is that your question? Answer: this is a two shaft engine. The fan is part of the LP shaft.

      AgentJayZAgentJayZ13 giờ trước
    • @AgentJayZ Are there internal components that spin at a faster rate? Thanks!

      R LyleR Lyle21 giờ trước
    • Well when imagining af fan 2,85 m in diameter doing 3500+ rpm there’s is lot of movement behind it ;)

      Alexander SieboldAlexander SieboldNgày trước
    • I've put a link in the description for a manual for an older model of P&W4000 that says the fan turns over 4000 rpm. We're in the ballpark, and P&W doesn't list rpms in its spec sheets.

      AgentJayZAgentJayZNgày trước
  • I'd bet the shaft was bent... any takers?

    FTATFFTATFNgày trước
    • Without doing any math, im drawing on my experience as a merchant mariner and dealing with smaller horsepower... but also lower rpm. I could be wrong, but id bet

      FTATFFTATFNgày trước
    • Maybe, the fan bearing is huge, like a meter in diameter...

      AgentJayZAgentJayZNgày trước
    • each blade is 34 lbs so when you have 1 blade and a half missing, the shaft is a goner here

      Lin ChesterLin ChesterNgày trước
  • Dear Jay. There's this picture on Twitter ( ) I guess this is, by far, the most clear evidence of what happened. As you say at the end of your video, it looks that a blade broke but was contained by the duct fan. Perhaps, once broken and ingested, it damaged oil or fuel lines and then the explosion of the engine and fire that some people reported. The shaking that we see in those videos you are referring to is a consequence of the imbalance due to the loss of this half blade. If this video is related to the incident ( ) the airplane had already ended the stressful take off and it was climbing (still stressful). Great video!

    3rik R Vargas3rik R VargasNgày trước
    • Mr Jason Rabinowitz (@AirlineFlyer) did a great job collecting as much pertinent information as he could.

      3rik R Vargas3rik R VargasNgày trước
  • The vibration, to my eye, seems to be due to a dynamic imbalance. I’ll bet it was simply a missing fan blade and not a bent LP-Fan shaft.

    Matt LawlessMatt LawlessNgày trước
    • I think you are correct.

      AgentJayZAgentJayZNgày trước
  • AgentJayZ, Thank you for your professional analysis and opinion. There are some close up pictures of the right side of that engine on Simon Hradecky's Aviation Herald which shows more damage. In one of them it even looks like you can see a piece of a fan (?) blade hanging down from the front bottom of the engine. Thank you Paul

    Paul1958RPaul1958RNgày trước
    • Paul, I watched the video that Trevor Bryant calls to watch and there's one picture of what seems to be a blade... but it doesn't seem to be of the big fan, it seems to be from an inner stage or it is one of the pylons that give support to the nacelle.

      3rik R Vargas3rik R VargasNgày trước
    • Ya, just saw this video and there is a lot more damage.

      Trevor BryantTrevor BryantNgày trước
  • Good point Jay. Yes. The engine is all still on the wing. What fell to the ground were Aircraft parts. Not Engine parts. Sounds like we had an uncontained media failure.

    bassmith448 bassistbassmith448 bassistNgày trước
    • 😂😂😂

      c7042c7042Ngày trước
  • Something heavy went through the roof of a house. Any idea what that could have been?

    PhillipPhillipNgày trước
    • @David Fritzel Kind of unfair but funny comment though. The crew kept it together and appeared to be very professional about it. In all, this appeared to be a very well managed emergency. 😎💖😎

      c7042c7042Ngày trước
    • pipe or parts of the gearbox assembly unit that got ripped off. They sit outside of the main burning core of the turbofan but under the cowlings.

      Lin ChesterLin ChesterNgày trước
    • A tree?

      Xcaliber TrekkerXcaliber TrekkerNgày trước
    • The pilot's full diaper

      David FritzelDavid FritzelNgày trước
  • I’m not sure about this early 777, but most cascades being installed on current airliners are graphite epoxy.

    88SC88SCNgày trước
    • That makes sense. Very light and strong. Resistant to heat, but would still burn very slowly with a reddish orange glow that would appear dark compared to a normal flame.

      AgentJayZAgentJayZNgày trước
  • A 16-minute video that the tv media have under a minute to cover.

    Mike McLennanMike McLennanNgày trước
  • Thanks brother!

    Francis ContiFrancis ContiNgày trước
  • Haven't heard anyone talk about the possibility of the cowling not being snapped shut completely before leaving the gate (I'd like to know if Maintenance had it open while it was on the ground, Check the log book) or maybe a lav panel unsecured flying into the engine and breaking the blade which cause the fail. I've seen a DC 10 come into the gate totally mangled and the blades shot through the sides of the engine. This was not even close to that kind of obvious damage Curious to see how they explain this one

    Jon ThomsonJon ThomsonNgày trước
    • @Xcaliber Trekker True.. So many layoffs in the past year. a Recipe for disaster . My daughter just went back to LAX from HNL on a United 777..Scary stuff Where did you see the other photos?..Thanks

      Jon ThomsonJon ThomsonNgày trước
    • @Jon Thomson Yea many of the aircraft have been stored for a while due to covid slowdown and many probably not properly maintained. Also saw there was significant damage to the fuselage as well from either debris or fan blades but it was a big tear. Looks like it was probably unpressurized area thank goodness.

      Xcaliber TrekkerXcaliber TrekkerNgày trước
    • @Xcaliber Trekker Thanks ...Just took a look.. I think that's spot on. I wonder if they had any issues prior... and how many signed off figuring it could wait until the aircraft was scheduled to go in Things we'll never hear about I'm sure

      Jon ThomsonJon ThomsonNgày trước
    • Guess you didn't see my comment.

      Xcaliber TrekkerXcaliber TrekkerNgày trước
  • Thank you I like Juan Brown too Hello from PicoRivera

    Booby HatchBooby HatchNgày trước
  • Great vid Agent Zulu. Here is a link to a doc that defines contained & uncontained turbine engine failures.

    bemm69yahbemm69yahNgày trước
  • Great Presentation! Thank you!

    Will Hibbard IIWill Hibbard IINgày trước
  • Let's think about this. He can't see the engine from both sides, only a camera shot from a window. He explains the damage to the engine with a diagram from another engine!? Oh yea, the's not there. There's no fire because the fuel has been turned off. I guess the pilots panicked when they called out a Mayday! It'll take the FAA months to analyze the failure and write a report. In the meantime, everyone's an expert and the media are idiots.

    Thomas MartinThomas MartinNgày trước
    • We already know what happened I explained it in my comment genius. Why the blade snapped we don't for sure yet. But if you had any brains and did simple research you would know as well yet your mouthing off to someone that knows much much more then you.

      Xcaliber TrekkerXcaliber TrekkerNgày trước
    • Thomas, please read the description before mouthing off. Thank you.

      AgentJayZAgentJayZNgày trước
  • Great video. I'm curious what does a large compressor blade cost?

    darrylrdarrylrNgày trước
  • Blade failed took out another they got kicked out forward damaging the front cowling and causing heavy vibrations which then caused the nacelle to fail and break apart.

    Xcaliber TrekkerXcaliber TrekkerNgày trước
  • I have been working with jet engines for over 40 years now in development and production test cells. I agree with most of your comments relating to uncontained failure and 1/rev vibration, could possibly be a failed bearing rather than the LP shaft (there is so much energy that the shaft would likely fail rather than bend)

    Andrew TuckerAndrew TuckerNgày trước
    • How do you define uncontained failure? Over on the blancolerio channel, he's offering that the fan damaged the inlet cowling, leading to separation of that part. Then, lacking the initial section of cowling - the 200+ knot slip stream ripped the remainder of the cowl sheet metal away. I don't know that there's actual evidence of something that flew from inside the gas path, through an engine casing, to outside. Even though the exterior appearance is pretty dramatic and all.

      James MasonJames MasonNgày trước
  • I think fuel (or even hydraulic fluid?) was leaking out onto a heat source in the cowling, and the vapours from that then ignited. That's the only thing I can think of that could explain so much fo the cowling falling off without the fan rotor completely exploding. I'd say the blades getting damaged is a symptom of the duct bending inwards and snagging the tip of the affected blade rather than any underlying cause.

    PsychotolPsychotolNgày trước
    • Thank you for telling us what you think. I disagree with each of your estimations.

      AgentJayZAgentJayZNgày trước
  • I think you make a great point about the quality of technical/science reporting in the wider media. No question at all, it could and should be better. But I feel like we shouldn't be bashful about owning our own piece of responsibility. We should never expect that we can consume any sort of media without some active critical thinking on our own part. And I think your oft repeated guidance to seek multiple texts generalizes to multiple sources and applies here. I think this is also a general learning moment too. When you see how far off some reporting is on a subject where you have some level of useful knowledge? Maybe that tells us the degree to which we should trust media when we're hearing about something where we don't have knowledge?

    James MasonJames MasonNgày trước
    • Good point James, trust but verify.

      Stephen DixonStephen DixonNgày trước
  • I just came across an article of the same engine family failing on a 747-400 in the Netherlands. Anyone else see this?

    Marco LopesMarco LopesNgày trước
  • It was no big deal. Just a partial unscheduled disassembly.

    elkviselkvisNgày trước
  • New pictures of the engine in the hanger. Looks like it lost containment around the high-pressure compressor. Damage to fuselage and wing.

    Tom SmithTom SmithNgày trước
    • Where did you see them? My question has been whether the hot section got perforated from the inside.

      88SC88SCNgày trước

      Tom SmithTom SmithNgày trước
  • I agreed with BL at first, but your opinion/ explanation makes a great deal of sense. Very scary to the onlooker, but ‘contained’. I’d never know if not for you...thank you as always ‘zed’.

    ugalasugalasNgày trước
  • Media writers pick up key words like "uncontained engine failure" and they use it everywhere without understanding what it means. I remember when HRC got in trouble for "wiping" her digital devices. "Wiping" became the operative word for a few months. These sort of words get bandied about as if the writer thinks they make them sound smart.

    david clarkdavid clarkNgày trước
  • these days nothing is true on media, fake news fake people

    Skillful ManSkillful ManNgày trước
  • Thanks! I was hoping to see an AgentJayZ analysis of this incident. You’re fast!

    Darcy HildebrandDarcy HildebrandNgày trước
  • Good job!

    BuzzLightyearBuzzLightyearNgày trước
  • Nice information, but good god, ads every 90secs makes this hard to follow.

    Bree StandardBree StandardNgày trước
  • thanks for your input only see it today, wow what a thing to go through, most passengers have no clue, and drama queen's heighten worry. the press just want to most sensational claim to sell there wear's, it's out of order in fact, it can take year's to learn about event untill NTSB US, AAIB UK so thanks explaining to fact's as they were

    mic stonemic stoneNgày trước
  • In the last few hours some pictures have emerged that show a significant hole in the wing root fairing directly abeam the failed engine. I don't know what the official definition of an uncontained vs. contained failure is but something from that engine came off with enough energy to penetrate another part of the aircraft.

    KodiakRSKodiakRSNgày trước
    • So the non-engine part (cowling) detached and had a high speed visit to the aircraft. Seems that the un/contained term applies specifically to engine parts, not aircraft parts (that are attached to the engine), though likely if either hit anything living, it is not good. Given the precision of most things commercial aircraft related, I'd guess there may be subcategory contained-engine-failure-with-uncontained-media-failure-caused-damage. Aircraft born object falls from significant height is the stuff of nightmares. I wonder what sized chunks of blade may be ejected via exhaust in such an event (rather than retained in blanket) and if there is a point at which even that changes the classification of the event. (small blade debris becomes small blade chunk becomes large blade chunk becomes majority blade).

      Leuven is a placeLeuven is a placeNgày trước