WHAT DO YOU DO if your FLAPS DON'T EXTEND??? Explained by Captain Joe
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Welcome to our in-depth exploration of the Boeing 747's flaps system and its backup options. In this video, we delve into the intricate workings of one of the most iconic aircraft in aviation history.
The Boeing 747's flaps play a critical role in ensuring safe takeoffs and landings, providing additional lift and drag reduction during various phases of flight. However, like any complex system, backups are essential to ensure safety in the event of a failure.
We discuss the primary flaps system of the Boeing 747 and then delve into its secondary mode, which serves as a backup in case of primary system malfunction. Understanding how this secondary mode functions is crucial for pilots and aviation enthusiasts alike.
Moreover, we explore the alternate mode of the flaps system, another layer of redundancy designed to maintain control and safety in unforeseen circumstances. Delving into these backup options offers valuable insights into the engineering marvel that is the Boeing 747.
Whether you're a seasoned pilot, an aviation enthusiast, or simply curious about the inner workings of aircraft systems, this video provides a comprehensive overview of the Boeing 747's flaps system and its backup options.
Your "Captain" Joe
Intro Song:
Lounge - Ehrling: www.youtube.com/watch?v=a5ImN...
Outro Song:
Joakim Karud & Dyalla - Wish you were here www.youtube.com/watch?v=UXrxB...
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Glad you’re back Captain Joe!
Thanks buddy! Had to take a break from it all. But have a great line of videos coming :)
@@flywithcaptainjoe When MH370 was gliding to the surface of the ocean with the captain controlling it in the cockpit, & only RAT power available (but batteries too), at which point (e.g. 10,000ft) would he have tried to set the wings' flight surfaces (via the centre electrical system) to slow the plane as best he could for the ditching? Would the available flight surfaces take longer to set, due to being on the secondary power grid? I think he was aware of the slowness of the secondary power grid as he would have simmed it, so he was prepared for the delay to set those surfaces. What do you think? Thanks
Wow!! Two Captain Joe uploads within a week!!
More to come!
Joe, I'm a retired ATCO and I want you to know and spread this warning to pilots who you know that fly to Brazil: in June, some idiots build and release huge hot air balloons, mainly in the southeastern region of Brazil. You should ask for the main aeronautical authorities to contact INFRAERO for example, to discuss what can be done to prevent accidents that are " waiting to happen ". Sometimes even 16 kg steel butane containers are connected to said ballons. Be advised!
There were incidents before, with planes hitting those baloons and get entangled. I saw some pictures of that.
I think it should be treated as a criminal offence to send entire butane cylinders up there.
As someone who works in IT, I would love if our systems had a 'screw you, screw your failures, just do it anyway!' override switch
It reminds me of the “battle short” setting on some military equipment such as generators, basically it will disregard all faults / warnings and run until it’s out of fuel / seizes / whatever.
we've been waiting for this! Welcom back!
That neon light is brilliant. Of course the explanation is, too.
Gift from my girlfriend :)
CAPTAIN JOE!!!! Thanks so much for posting these. I'm not a pilot, just fascinated with flight. I thoroughly enjoy how you can take such a highly technical subject and explain it so anyone with a basic education can understand it. That's the sign of someone who mastered their craft. All the best!
Very happy to hear that, thanks!
That’s glad to hear, I’m also a teenager who aspires to become an aeronautical engineer the 787 production plant in Charleston. By listening to Captain Joe, I feel more connected and proud of my goal that will surely become reality one day
Great to have you back, Captain Joe!
Glad you’re back Captain !
Good to see you back Captain Joe x
I was a passenger on a 57 which had right flaps extend but not left. Pilot tried three times. Plane listed pretty significantly. We were in the vicinity of JFK’s 13k runway, so declared an emergency and landed at 250k if I recall, very long rollout. Trucks rolled but no fires. We were watched for a fire on a taxiway. It’s been 20 years, but I think my recollection is close.
Always learning, tks Mr. Joe!
Excellent information! 😎 Looking forward to part three!! 👍
Coming soon!
2:50 Joe, there is no asymmetry protection on the LE flaps. By the time the FCUs have detected a LE flap group not reaching the commanded position, say the LH group A flaps, the RH group A flaps will have already extended pneumatically. Only uncommanded motion cause the FCUs to react quickly (0.3 seconds). In flight, the switchover time to electrics in the air for extension is 35 seconds (25 seconds for retraction). The aircraft can handle LE flap asymmetry. I've seen other KZhead videos claiming asymmetry protection, but the Boeing Maintenance Manual disagrees. The Maintenance Manual even states that the 4 LE groups operate independently in primary pnuematic and primary electric. Ref: 27-10-00 pages 10~12. Note that the Boeing Maintenance Manual does not use the expression "secondary".
Thanks buddy! I will ask my maintenance boys! But thanks for the heads up
@@flywithcaptainjoedemand explanation from maintenance lower class individuals. You are above them. They are subservient to you. Aircraft maintenance is very very low class. Pilots are extremely high class.
@@user-gn2wp8wp2iAnd a retired engineer is even lower class 🤪The engineering comeback is "You can teach a monkey to ride a bicycle, but you can't teach it to fix one"
@@flywithcaptainjoeOf course, Boeing Maintenance Manuals have been known to be wrong or ambiguous. I looked at the Boeing wiring diagrams and independent electrical control of Left and Right wing group A flaps (and Left and Right wing group B flaps) is not possible. There is a single control ouput pin on each FCU to the left and right group B drive motors (2). There is another single control ouput pin on each FCU to the left and right group A motors (6). Well, there are multiple relays between the output pins and the drive motors, so it is possible that a relay could fail in Primary Electric mode (your Secondary Electric mode) and cause asymmetry in the same group. However, there is still no real asymmetry protection on the LE flaps. Boeing manual quote: "5 (c): If a the FCU sets a disagree while a flap group is in primary electric, the FCU will continue to energize the electric motors, even though there may be no flap movement. (d) The times (sic) delays for the FCU to set a disagree are: ..... 3) LE Pneumatic: Extend: 35 sec in air, 15 sec on ground Retract: 25 sec in air, 15 sec on ground 4) Extend: 135 sec, or 5 sec to leave retracted position on ground Retract: 135 sec" Clearly, this is not going to stop asymmetry in LE Primary Pneumatic or Electric. Note that there may be further time delays on the messages appearing on EICAS.
@@user-gn2wp8wp2i you're a total knobber if that's how you treat and think of people. The sort of plot that gets people killed.
Wow youtube recommended your video after a very long time like after a year...glad to see
Good to see some new uploads, Captain!
Thanks buddy! I know it's been a while
very interesting video Joe! :) also those flight simulator shots of LX-JCV are absolutely gorgeous!!! looking forward for the part 3
wait, you've a cargo department?!
@@HxTurtleno, the names Cargolux and LuxPlanes just contain “Lux” in reference to the country “Luxembourg”. We are not affiliated with each other in any way. Hope that clarifies it :)
Thanks Ryan, hope to see you soon!
@@LuxPlanes yes it does! thank you very much! 😊 I honestly assumed so and just wanted to play a tiny bit with you since the company Joe's flying for sounds so similar 😅
Just had an experience of no flaps on a flight to Lanzarote with TUI, pilots had to land with no flaps as a single sensor failed! Came in hot!
Missed you Joe!, İt’s so nice to see you again❤
Great to see you back! Wonderful explanation of the systems....would love more system videos about the Queen! Danke!!
Stay tuned. Working on them right now :)
Today my lecturer explained flight controls, very helpful, thanks joe❤️🫡
Flaps assimetry is very dangerous. I feel better now that I learned all the mechanical and electonics protections against this nightmare.
Not information I personally will ever need to know, I'm not a pilot. But it was still an interesting video to hear about the alternate and redundant systems involved on a technical level.
Good Morning,Captain Joe! What better than wake in the morning and watch the most favorite subject(Aviation)presented and explained so successfully,by the most favorite and technically qualifed instructor!! welcome back sir,Best wishes,and Always Beatiful and Safe tavels!!! Always awaiting eagerly for more posts to come!!!Thank you!!!✈️👍
Thanks buddy! That means a lot!
Thank you Captain Joe
Great report mate,safe flights,🙏🙏👋👋👍🇦🇺
Great video. Very informative as usual.
We need more
In the making!
These explanatory videos are very well done and sorely missed! Bitte mehr hochladen!
Good one Captain
Снова рада тебя видеть здесь красавчик Джо. Обожаю смотреть твое видео. Береги себя капитан Джо!! Удачи и всего наилучшего!! ❤❤❤❤❤
I liked the video before waitching it😂😂 this implies that I believe all the info to be obtained here,,,,, big up Capt.Joe 🇹🇿
I thought the movable part on the front of the wing was called a Slat. If all systems fail you can always do a no flap landing, just need a very long runway
Both are different. If the device re-energises the boundary layer, those are slats. And if the device increases the camber, then those are leading edge flaps.
On the A320 they are called slats, on the 747 they are called "Leading Edge Flaps". Same same but different ;)
Ecxelente vídeo
Intersting Video Joe
Great!
Excellent
Very brilliant video. Interesting is, that there are so much redundancies in the plane and additional backup backup system if all 3 FCUs fails. I didn't know that there are 3 different drives types (pneumatic, hydraulic and electric) only for flaps. Love this type of videos. Please continue! Maybe some videos of an A380 would be great 😍
Awesome to have you back, when are you doing the video on the pedals
Great to see you back Cpt Joe hope your doing well. It's bit ironic as last we we done a overhaul on a Polar cargo queen of the air and replaced her Krueger Flaps. Will have to get a beer when ur next in Glasgow
Man, what would I give to have a Krueger Flap and make a coffee table out of it ;) Especially the flat and straight ones near the wing root :)
@flywithcaptainjoe I'll keep my eye out as there are a few for scrap. If I can get hold of one I'll give u a shout
Finally! I’ve been waiting for this for ages and I gave up fruitlessly asking for the 747 flaps video. They are possibly my favorite flaps of all time. Please don’t this to me again. Either don’t tease or one month delay max.
Yes that 747 Flaps are one of a kind :)
Flaps Assymetry Protection, or FAP
Drop a blue tablet in the fuel. Works for me!. Sometimes, my "flap" won't extend.
and if that doesn't work, ask for the runway they used in that fast and furious movie.
Threaten the flaps with a firm voice.
So glad this is Captain Joe, channel, and not Captain Josephine. That title could get you banned.😉 It's only a joke, folk.
Good one ;)
4:35 I am currently using that software to try to land a fully loaded a320, with all the assists, for a year ( I only take care of the speed, flare and breaking and not of any other avionics) Well, we gotta start from somewhere!! 😁
Great explanation! Having worked on the Airbus A350 flaps myself, I notice some important differences to Boeing. Captain Joe, could you please make a video on that, it would be very interesting! (I won't comment on details of these differences - my information is confidential.)
Hell yeah
Very interesting. Looking forward to the next episode. Btw do you also have a CargoLux model in the actual grey levery for sale?
Welcome back good looking
If my flaps fail, I will be calling my personal hero, Captain Joe! 🌠
I think you should upload this video to a secondary channel just in case something goes wrong 😂
Good one ;)
Epic
Flaps control popped up on me in the sim one day. Haha I spazzed a little bit and just began to use my spoilers😬
I thought the video would be about what happens when everything fails and the flaps remain up no matter what...
that I thought as well, lol.
Do they abbreviate the "Flap Assymmetry Protection" to "FAP"? SCNR - great video as always
Thank you, Joe, but where is Part 1? It's not posted and no link in the video. . .
Checking that! The video definitely exists ;)
So in the last scenario: would the outer TE flaps extent beyond the 25 degree setting, if you keep extending to get the inner TE flaps to that setting? Would you have to retract everything first to get all the TE flaps on the same setting at the same time?
How would you deal with flap asymmetries in alternate mode?
I think one more point is that the food made in vertical farms and greenhouses are tasteless. The German and Dutch greenhouses produce a lot of tomatoes and onions and potatoes but they are just plane bland. A lot of flesh and looks but insanely bad to eat.
Hi captain, when alternate flap is selected, do we have “ to low flap “ advisory during finals
I would hope that all Pilots have Subscribed to you so that incase of an emergency.. they can quickly refer to one of your videos and land safely!!
I wonder why for the B747, the leading edges retract immediately after touch down, but then they extend again. Seems unnecessary to me. What do you say?
Protection against debris from thrust reverser!
Very interesting. I'm wondering about the flap situation with MH370 as power was provided only by the RAT (after fuel exhaustion) as the plane descended in a glide to ditch on the sea. Thanks
Hi Joe. I have an interesting subject you should do for a future video. Why some planes have APU and why some planes don’t. Also why some planes need APU and some planes don’t need APU. Sound interesting enough?
Can you list the planes that don't have an APU?
As I’m realizing only passenger jetliners have APU. However some aircraft from the early ages used piston power to power an engine thus spinning a propeller. So therefore Passenger Jetliners have APU. Piston driven aircraft don’t. But why?
statistics of most rarest failures (and also not being accident/incident) ex manual flap extraction was used 10x through all history of 747. would be fun.
No subscriptions button to click. Anyway. Awesome.
Yes but what do you do when all redundancy options fail to extend flaps. Find a longer runway
Your "Flap Link" in the left upper corner from this vid didn't show up?... Houston we've got a problem!
Will it be safer to land flap up instead of extend flap without any protection?
No! Your approach speed will be very very high and you need a super long runway to come to a stop!
@@flywithcaptainjoe Make sense. Thanks for sharing the knowledge
So altn mode -> go around in full flaps?
good question! (even though it didn't specify retraction times in this video; or so, I think.)
Flaps 25 max when using Alternate Flaps! And yes a go-around is a tricky one. It works but you have to wait a minute for the flaps to retract!
I have a question, do pilots study about the all the systems of aircarft in detail. Do technician and pilots have same level of knowledge about the systems of aircraft?
No. Most pilots have a fairly cursory understanding of systems and that's OK. In the history of accidents VERY few have been aggravated by a lack of detailed system knowledge.
Someone piloting the plane like me would stay cool as a cucumber because I would have no idea at all that there is any problem !! Great to know though. Next time I see this out the window and the flaps are creeping along.. I'll know that they're using the backup system....and go back to sleep :)
We saw Kelsey from 74Gear being promoted to captain. You are older than him, I assume. Whenever a Cargolux plane lands at Schiphol I assume it is you. Are you in check for your fourth bar?
What if one lowers quickly than the other I know the 737 has a protective system
Aren't the leading edge flaps called slats?
Both are different. If the device re-energises the boundary layer, those are slats. And if the device increases the camber, then those are leading edge flaps.
❤🎉
🎉
I wonder if you can fly upside down and maintain altitude okay with full flaps and gear "down". This video made me wonder.
probably not. landing gear position wouldn't do much, aerodynamically (aside from adding further drag; but it doesn't alter lift characteristics.) I reckon that a commercial jet might be able to flight upside down with retracted flaps. but with them extended, too much air gets directed into the then "wrong" direction that the required angle of attack to counter this would just be too high; or the engines not powerful enough; however one wanna see it.
Redundancy. Redundancy. Redundancy. Is that a nod to Dr. Mike's Chest compressions. Chest compressions. Chest compressions.?
No :)
What happens if the electric motors fail?
❤😊
I think the first video might have gotten pulled down for some reason. 😮
Can't you just flap with the wings instead?
Joe, could you maybe do a (short) video on MH370? Just a reaction or just some thoughts u can share on the accident
See Green dot aviation 😊
As long as there is no official report, I won't do a video on it. But there is another guy, who just loves making up stuff from thin air, to get the views!
Land fast
Hi! Thank you for the inreresting video! Can you please explain, how can you restore a pressure in hydraulic system in flight? You can, in theory, use a fuel as a hydraulic liquid to refill the system, but this is not the case for 747, if I remember correctly... Thanks!
For example if you had an overheat situation, then you would shut it down for a while to cool off, and then start it up again for approach and landing
@@flywithcaptainjoe Thanks for the answer.
Go fast????
This is why Joe is the best. While "other" pilot YTers sensationalize accidents, Joe provides education and knowledge. Great work, mate! Need some more One Minute Debriefs!
See a Gynaecologist straight away!!
Full pitch veenita didn't even took any note,spoke once directly to give offer… done.
if they don't extend, the land will be very fast.
You should probably upload multiple copies of this video for obvious reasons.... (Redundancy.... redundancy... redun.....)
Redundancy, redundancy, redundancy. That’s basically the basis of aviation and all aircraft have to adhere to it
Except Boeing apparently.
Land at a higher speed on preferably a longer runway. Not rocket science.
If the flaps don't extend you tell your boss to quit buying from Boeing.
Yé Joe, do you have a lot of scammers? Because twice time they felt in love with me and they did loves vidéos with your image 🤷♀️
What? Not me being first 🤣❤️
Wait. Is this real? Are we finally getting a new video or is this reupload?
All real :) Back in action! Sorry for the wait.