BOEING 747-8 ALL ENGINES FAIL INFLIGHT (overview)

Hello again all- how do you do. I know that most of you will know about some Boeing 747’s in the past that ran into volcanic ash and suffered a loss of power in all 4 engines when they failed. So what happens in the cockpit when all engines fail? Does the aeroplane’Fall out of the sky?’ To use a favourite term by the media. The answer is NO! It does not ‘Fall out of the sky’. It just becomes a large glider- the wings still produce lift due to forward speed(albeit in descent). Emergency standby power activates, using the aircraft battery to provide enough flight instruments for the Captain to have direction/speed. An emergency Ram air Turbine deploys on the failure of the third engine to provide hydraulic power to run system 3. This gives flight control power. The First Officer then has to start attempting to restart the engines/ doing the checklist. Hopefully at lower altitudes, with better airflow etc a stalled engine will restart. This video gives you a quick overview of what instrumentation/control is available when all power is lost. Hope it gives you some insight into such an emergency.
Chi Di Gin! Later!✈️✈️✈️✈️

[@MiturBinEsderty]

The 747-8 is going to become the 757 everyone will want it once they stop making it. You can’t call it a gas guzzler with 787 engines. In testing they took off with a take off weight of 1 million pounds. MTOW is 975,000 pounds that’s incredible. Large aircraft are going to be needed. The 777-300f it wasn’t meant to be a freighter. The MTOW will be limited and the cycles are going to be limited. The 747 is going to be in high demand.

[@eysank]

Yeah, as long as teleportation is not invented, the 747 will still live on dutily (at least as a freighter)

[@Namisincere]

The 747 was designed to capitalise on the freighter market in the event that it was no longer needed in the passenger market. It's pretty evident when you look at the 747's design, the hump is clearly not there for cosmetic purposes. The mindset was that, at the time, there were talks of supersonic jets replacing turbofans in the passenger market (not to mention that passenger travel demand can rise and fall on a dime, unlike freight). It still ended up being pushed out of the pax market in favour of twinjets like the 777, 787 & A350, so you could say that Boeing used the wrong formula and got the correct answer

[@09shadowjet]

@@Namisincere I love your description, especially when you said "Boeing used the wrong formula and got the correct answer". That description is spot on.

[@robtebay1]

I hope there's a Part 2! Showing how a suitable airfield is located and the plane is successfully landed. Much later!

[@pilot_obet]

There will be soon.

[@robtebay1]

Do you ever fly smaller private planes when you could maybe set up some GoPro cameras and film the whole flight? That would be great.

[@pilot_obet]

Not yet but will do soon…watch this space

[@TheDarkFalcon]

@@pilot_obet I've been waiting for "soon" for 2 months now 😂😭😭🔜

[@pilot_obet]

@@TheDarkFalcon ha ha…there are still so many restrictions in hk etc…so I’ll repeat…soon😀

[@jesse00pno]

Why isn’t starting the APU the very first thing to do? Edit: I just saw the answer to my question in another comment you answered. Thank you!

[@B747-4OO]

A scary situation 😬 thanks for taking us on the flightdeck to see the procedures!

[@Pro_Gamer6o]

bro its not a flightdeck its a simulator?

[@mrnice5245]

Amazing Videos! These are very informative of what pilots actually do when they get faced with these situations :) Also thanks for taking the time to make these videos :)

[@HieuHoang-xi8rw]

Awesome vid. But if possible, can you make a cold and dark video in 747 400 cockpit please!

[@Christianczitkovich]

i admire your channel every day and your interest in explaining the technology to people...unfortunately i can only fly the cessna 182 or DA42

[@pilot_obet]

Cessna 182 etc are good aircraft and I came from Cessna 150 and PA28😊

[@KatsuSush]

Basically explains what happened on a KLM 747 when it flew on volcanic ash

[@arthuuu_]

Hi capt, just a general question, do airlines take pilots' preference into consideration before ordering new planes, or is it purely based on cost and performance?

[@pilot_obet]

Cost….it’s about money😊

[@TheGamerUnknown]

Minor additional note: If two aircrafts have similar cost, efficiency, capacity, etc - they may partially decide based on re-training costs. Some newer/revised aircraft may not require (or require little) re-training, which saves an enormous amount of money. That's part of what caused the 747-MAX debacle.

[@SuperFullin]

Awsome! Not the failure obviously, but the video. Dumb question: is there a ballpark best glide speed or attitude for a 748, like in GA planes? If so, is it a function of weight? I've noticed the speed hovering around 240 KIAS on the PFD... Cheers from Brazil 😍👍👊

[@pilot_obet]

Hi- yes there is. In general the best hold speed is a good one to maintain.

[@506jeff]

great video thanks for sharing

[@annapaolagrandini1052]

Really interesting and thank you for sharing these videos those give us pilot POV and his training.

[@grobbelm]

A scenario which one hopes never rears its ugly head.

[@pilot_obet]

Indeed

[@markcardwell]

Thx

[@defiverr4697]

This is what I hate about air breathing engines. After 90 years, the grains of ash bring them down. Warp engines don't stall from volcanic ash, only nebulae. Need warp drive by now, for gawdssaykes!!!!

[@hoghogwild]

1:34 Autopilot disconnects-Immediate Action=Deploy the RAT.

[@ft6755]

This might be a stupid question, by why can't the APU power the hydraulics?

[@Savoir-Pouvoir-Agir]

Waoow... Very interesting and we learn a lot. Hopefully it's not happening often. How do you prepare the crew against the stress? I guess they have to react quickly..... Later captain.

[@AlongtheRiverLife]

I had one engine do this in my PS1 and PMDG sims. With the procedures it restated. But all four engines?

[@shalininaicker]

Would be every pilots worst nightmare when all engines fail.

[@elicardoso7060]

Good morning, Commander. exceptional engine failure procedure class. Brazil GMT-03

[@Intel37003]

Fantastic Channel this as an aviation enthusiastic person I Really find it awesome knowing this information in an emergency is extremely useful

[@reeltrides911S]

So when this happens over a volcano for example, will the ash slow the engine restarts? How long of a glide does the plane have in the mean time in case of a dead stick landing?

[@pilot_obet]

I’ll show you in another video soon

[@solomoncyj]

why didn't they turn on the batties, engaged the apu and tried to restart the engines?

[@mohammedbarry918]

Very interesting what you're doing,god bless you

[@abduljabar8445]

The spool down sound is really a nightmare

[@bigbtripathi]

Hope to say mayday mayday calls in next video.

[@UncleTravelingMac81]

I like your videos Brother! Later!

[@rocco1]

why no starting the apu?

[@hoghogwild]

Is there a way to simulate fuel starvation? Engine will usually go down in a predictable or at least known order as the pumps run dry one by one. Anyone know?.

[@pilot_obet]

Yes, we can let the tank run dry and engines will shutdown. Ill try in simulator soon

[@AlongtheRiverLife]

So how do you restart them?

[@alphabravoindia5267]

Hello, capt, I have just recently subscribed, however I do have one question. If all 4 engines flame out, wouldn't the descent rate be greater than what was indicated on the PFD at around 3:50? I have no authority to speak for the handling of the 747 in an all engine flameout as I have never flown the plane nor am I a pilot. Thanks for replying.

[@pilot_obet]

Yes it can initially while establishing the required speed but will settle to normal descent rates for aircraft weight

[@leonfong4456]

Exciting are they !!

[@sebinamuwanga]

Thanks, Skipper. I thought they would set the throttles to idle and also make a MAYDAY call to ATC.

[@pilot_obet]

They would normally but this was me showing you what you would have left in terms of power etc.

[@yosefjabbour6530]

Does the FO screen always go off when all engine failure as seen in the video? If yes why does that happen

[@pilot_obet]

Yes because the aircraft is now on standby power. To conserve it for a longer period, the F/ O instruments are removed.

[@kd7alt]

Does the dash 8 have an APU? Or was that not installed after later models of the 747"s?

[@pilot_obet]

Yes it does

[@AKjohndoe]

Why wouldn't you start the APU?

[@fireflythe7]

It’s better to use the Ram air turbine (RAT), to generate hydraulic and electric power through a prop placed in the slip stream of the aircraft.

[@mahyarrafe8039]

Wow. So challenging position. What should they do now????????

[@pilot_obet]

I’ll do a second part soon

[@mahyarrafe8039]

@@pilot_obet Thanks a million

[@furzkram]

What about trying to start the APU?

[@dingerbell100]

On the 747 the APU cannot be started inflight or used above FL200 if it was left ON before take off.

[@pilot_obet]

See some answers already given to other people that asked same question

[@furzkram]

@@pilot_obet sorry the other comments wouldn't show due to a browser cache glitch. I didn't take the flight level into consideration h but at a lower level it would be possible to start it in-flight?

[@dingerbell100]

@@furzkram You cannot start the APU on a 747 in flight. It was never designed to be used for such purposes. The 744 has 4 engines & 4 separate electrical generators. This is a huge amount of redundancy. An APU is not really providing much back up. You are thinking about twin engines & two separate sources of electrical power & therefore less redundancy for critical systems. Loose one engine on a 744…not really a big problem. Loose one engine on a big twin…you have a big problem.

[@ImperrfectStranger]

@@dingerbell100 On the early (Classic) 747-100, starting the APU was optional in flight.

[@N1611n]

If I lost four engines, I'd ask my F/O on which wing😁

[@pilot_obet]

You a B-52 pilot then?😀

[@N1611n]

@@pilot_obet Good god no! If I were, I'd want 8 on each wing🤣🤣🤣👍

[@MiturBinEsderty]

Why no APU

[@pilot_obet]

The B747 APU cannot be started in flight. It is a thing that is fitted on twin engine aircraft generally because of less redundancy. With 4 generators on 4 engines, it was never certified for use in flight. That’s why no APU

[@alexx_mendezz]

What's the chance of having multiple engine failure on a Boeing 747?

[@ImperrfectStranger]

Very little. Volcanic ash, extreme cold and bad fuel are some of the things which can take out all engines. Stopping flights near active volcanoes and updated procedures when encountering volcanic ash greatly reduce that risk. Bad fuel is rare and because old fuel is mixed with new fuel on most flights, the chances of engines flaming out simulataneously is not likely. The 747 has a fuel temperature warning system, so cold temperatures should not be a problem. You just fly faster and lower.

[@alexx_mendezz]

@@ImperrfectStranger so, chances are very low

[@morry19965]

@@ImperrfectStranger Google - British Airways Flight 009, This was a 747-200 that lost ALL 4 engines due to Volcanic Ash and almost had to ditch however the excellent skills of the crew and the fact they flew out of the ash thankfully lead to the engines coming back on line...

[@ImperrfectStranger]

@@morry19965 Maybe you should have addressed that to Alex. As I said, volcanic ash is one of the things that can take out all engines. There was a KLM incident with volcanic ash which also took out all engines. However, now that the risk is known, aircraft are grounded in certain areas if there is a risk, and QRH procedures have been forumulated if you do still fly though volcanic ash.

[@DJxSKETCH]

why not start apu ?

[@pilot_obet]

The APU is not available in the air on B747. You can takeoff with it on but only for pneumatic power- no electrics. Even then it’s only up to FL200

[@abdhullahahmadh6078]

Great video, thank you Captain

[@pilot_obet]

My pleasure

[@mahyarrafe8039]

Was perfect dear Captain

[@pilot_obet]

Thanks

[@Maersky-747]

Thanks for the video Obet. I asked you before about the Ram Air Turbine. ... I've got a couple of questions to ask ... with an ALL engine flame out, why doesn't the RAT deploy automatically/immediately and does the RAT not provide any electric at all? If it doesn't, how long can the aircraft survive without any electrical power being generated.

[@pilot_obet]

Hi- I think in my narrative I mentioned that it deploys automatically when more than two engines fail but its a belts and braces thing that we still manually activate the switch. the aircraft has 4 generators so for the rare occasion that yo may lose 4 engines, what you need is hydraulics more than electrical. Yo cannot start the APU in flight on the B747 for same reason- extra certification would be required for it on an aircraft that already has good redundancy.

[@Maersky-747]

@@pilot_obet Ah ok. I think once again I got a bit over-excited watching your video 😂😂 so I must of missed you saying the RAT auto deploys. Thanks for the video, another one of your terrific videos ... Captain Obet ... King of the Sky 🌟🌟🌟🌟🌟 👍👍

[@jesse00pno]

@@pilot_obet Can you elaborate on why the APU isn’t available?

[@pilot_obet]

@@jesse00pno it’s purely because of redundancy that is already available- as in 4 generators from the four engines. Twin engine aircraft like the B777/737/A350 etc need it as if they lose an engine, then they are immediately on 50 % thrust and only one generator. The likelihood of 4 engines failing although possible and has happened is still rare and 4 engines is good redundancy.

[@CameTo]

@@jesse00pno assuming he was at 10k, then it should be. I can't recall exactly but I think APU can start and work upto about 16... Also attempting to start APU eats up a large chunk of available battery, so it's best be really sure. But battery alone is enough to power critical systems for as long as she can glide, which is gonna be the limiting factor especially from ten k, that's gonna be curtains in less than ten minutes

[@TheFurreid]

yes, hope there is part 2 ie recovery..

[@pilot_obet]

There will be..

[@TheFurreid]

greattt!!!

[@nateford6099]

i hope these pilots don't ever have to encounter this because they have no reaction to try to resolve the problem.

[@pilot_obet]

I’m in a training simulator session. I was showing them what happens etc. next lesson is how to get out of it. I explained at the beginning of the video if you heard what I said….