The Hidden Flaw That Went Undetected | Mahan Air Flight 1095
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- Опубликовано: 25 окт 2022
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This is the story of mahan air flight 1095. On the 15th of october 2015 a mahan air 747 was flying from merhabad international airport to bandar abbas in iran. Can I just say for a second that irans slowly becoming the an aviation nerds paradise? I mean iran has a lot of old airplanes that are flying no where else in the world. I mean if you want to see an F14 tomcat in flight thats the only place to do it. They also have a few MD82s that are in flying condition over there. I wish we had more of that elsewhere.
Today were talking about a mahan air 747-400, the jumbo jet had 422 passengers and 19 crew members. It is rare that you see a jumbo jet on such a short domestic flight but thats what was happening here. The crew members were also very experienced. The captain had flown a multitude of airbus and boeing aircraft and had more than 24000 hours in the air, the first officer flew the airbus a300 before the 747 and he had 3800 hours of experience. The plane lined up with runway 29L and the 4 engines of the 747 was pushed to max power for this takeoff. As the plane picked up speed the 747 lifted off into the skies of iran at 8:16 am local time. The pilots put the jet into a left hand bank as they pointed the plane in the direction of their destination. As they climbed the pilots noticed something weird, the vibration data from engine number three made no sense, all other engines had a vibration value of .4 but the number three engine was at 2.4. The pilots didnt make too much of it and they opted to continue on with the flight. Flight 1095 slowly climbed over the suburbs of tehran as it gained altitude and then when they hit 7500 feet the jet was rocked by an explosion. The whole plane rocked as the pilots raced to figure out what had happened and they tried their best to counteract what was happening. As they struggled with the plane and the multitude of warnings that were going off in the cockpit they noticed something that was very concerning. They had lost engine number three or the inboard engine on the right hand side. The 747 had 4 engines so losing one engine isnt such a big deal but what was was that they had lost their 1,3 and 4 hydraulic systems now that was a big deal. On large jets the control surfaces of the plane arent moved by the pilots directly but their movements get translated into electrical commands that then get sent to hydraulic motors that then move the controls surfaces, if you lose your hydraulic systems youre going to have a barely controllable plane on your hands, so these pilots had to land this plane before their last hydraulic system gave out. They were in a race against time. They had just taken off and so the best course of action would be to just turn back to the airport and land on the runway that they had just taken off from. Since the jet was fueled for such a short flight they were not too overweight on landing. One less thing to worry about is good right? The vibrations made it clear that something was seriously wrong with this plane. Their indicators told them that engine number 4 was also experiencing some trouble , if they lost another engine then they'd be in a world of trouble. Then they lost engine number 4 as well. The pilots now had a ton of checklists to do. From running the two engine inoperative checklist to the two hydraulics inoperative checklist to the fuel leak procedure then they'd be able to get this stricken plane back down on the ground. As they headed back to the airport the pilots tried their best to restart engine number 4 but engine number 4 did not start. Making matters worse they were leaking fuel from some of the tanks on the right hand side of the plane. They would have to land the plane like this. The captain put out a mayday and the controller told them that they could land on runway 29L if they so wanted. Thats what they decided to do they kept the plane in the left hand bank that it was in, they tired to turn on the autopilot to take a bit of the load off of them but since hydraulic line number one was shot the autopilot refused to engage.They kept hand flying the 
Наука
I lived in Iran in 2015 and flew all around the country on Mahan Air - including a Fokker jet whose interior was mainly held together with masking tape! No one batted an eyelid! I also got training on an autogyro in Kish Island with an IranAir pilot. Lovely guy, great skills and awesome gyro pilot!
I learned to fly gyro in RAK, UAE in 2012 :)
What do you mean by gyro pilot?
@@moiraatkinson Shorthand for the pilot of an Autogyro.......cunning huh?
@@davidjma7226 I hadn’t heard of them. Since a gyro is also a piece of equipment on a plane it was slightly confusing.
@@moiraatkinson same here. I still don't know what it is
I flew this airline a couple of years ago from Bangkok to Tehran in business class. Of course there was no champagne on board so after a nice glass of orange juice I went to the lavoratories and was shocked to see the entire wall panel where normally you would expect to find the mirror was missing. All the wiring behind it was completely visible. An interesting if sightly unsettling sight!
Bloody hell 🙈
Iran: aviation geek paradise, everyone elses' horror show.
@@Avendesora I absolutely agree. And then the comment at the end about, do you think the sanctions had an effect?" ABSOLUTELY, that is EXACTLY what they are designed to do. Don't want to play by the world's rules? Then you don't get to have the advantage of participating in its benefits.
@@Avendesora YES!!, I thought the exact same thing, and came to post it too, but you did it sooner and more eloquently that I would have…. because I’m pissed off about it.
Sounds like bad maintenance and nothing to do with sanctions …. I wouldn’t get on any Iranian plane….
If Iran played nicer on the playground, they would have more access to all the toys.
@@ian7379 - By association: Sanctions = no access to parts = bad maintenance.
Great flying from the pilots. Would never have thought that there would be passenger 747s still in use in 2015, much less in 2021, especially for domestic flights.
The Queen is dead.
@@vodaredhill1704 long live the queen. Had the pleasure to fly in many of these and most recently lax-fra on a lufthansa 747-800… amazing beast. Another fav is the 757 which of course Boeing sadly decided to axe and now everyone wishes they had updated and expanded that airframe. Oh well..
Thank you.
Your commentary in this field is by far the best on RUclips. You are clear and concise and explain things without sounding patronising to those who probably know far more than I. I look forward to your vids. Thank you again.
I'm a fan of your channel and I am from Tehran, Iran. Make more videos about our airlines. There are lots of weird crashed like Caspian Airlines en route to Yerevan (Flight 7908). Cheers
My family was stationed with the army in Tehran from 1965 to 1967, plus or minus. Been a while back so I’m not completely clear on the exact time range. A beautiful country and beautiful people, wish I could go back for a visit. I went to Tehran American School, TAS, and went to the Caspian Sea multiple times.
@Räche SD i need more a300, 310, 747, md82 (tl;dr: i love old commercial planes)
@Räche SD sure!
It's a good thing the aircraft was a 747, honestly. The Queen of the Skies' having multiple redundant hydraulic systems saved everyone's lives.
All commercial airliners have multiple redundant hydraulic systems. That being said, the fact that it was a long-haul plane used for a short flight probably saved them, as they could go pretty much straight back to the airport without needing to dump fuel first.
@@AIRDRAC It's my understanding though that many only have two vs. the 747's three or four.
@@ZeldaTheSwordsman 3 is the standard on pretty much all modern commercial planes (even short-hop planes like the CRJ-900 and Embraer 175 have 3 redundant systems, as do common planes such as 737-800s and Airbus A320s) :) And while the Airbus a350 and a380 only have two, that's because they also have two electric backup systems that can take over the role of the hydraulic systems for flight surfaces and other critical components like landing gear.
@@AIRDRAC 737 flight controls mechanic here to back you up. Our -700 and -800 have essential 4 main hydraulic pumps across 2 systems. Each system, A and B, each have their own engine driven pump as well as an electric motor driven pump. Alternatively hydraulic power can be provided to select system that lack manual reversion by an electronic standby pump with its own reserve fluid volume (such as flap extension/retraction, leading edge extension only, rudder, nose wheel steering and other similar systems). So yes, even in a relatively small 2 engine non-etops aircraft, there is massive redundancy in terms of hydraulic systems.
@@AIRDRAC And some aren't properly redunant.
The aircraft involved was a B747-300, not a -400 as you narrated. To be precise it was a 747-3B3 originally delivered as a combi to UTA.
Not to mention the aircraft shown in the simulation video is a 747-800 with the GE GEnx engines with the distinctive sawtooth fairings. I guess the sim game didn't have an older 747 option?
@@sintillate1913MFS doesnt has a 747-300
Great video. It's called Mah-Han air ;-) I have flown it many times in and outside Iran. The pilots are renowned for brilliant soft touch landings. Tradition in Iran is that passenger applaud for a soft landing. Or not!
CORRECTION...The 747-400 is NOT a fly by wire aircraft. Like many Boeing aircraft of the era, there is a direct linkage via cables & pullies between the control yoke & control surfaces. At that time, Airbus were the primary users of FBW tech, not Boeing. No worries, still enjoyed the vid as always 😉✌️.
@UCfYIj5_CXp1WeuNHu7daujw NO, IT ISN'T!! The control yoke movements are boosted by hydraulic fluid & pressure, but there absolutely is a direct linkage between the control yoke & surfaces. In contrary, an A320's control surfaces are moved by a side stick, which sends a signal to the FMC, & THAT moves the control surfaces.
@@dodoubleg2356
Yes, DOGG! Exactly what I came to say.
🍌🙂
@@HeinrichDixon exactly.
Pobody’s Nerfect 🤷
@@Iffy350 that's funny, gonna have to use that sometime, ha. Jokin' aside though, I don't expect perfection. However if I make a mistake, sometimes it takes someone pointing it out (politely, which I did) in order for me to learn from it & not repeat it.
Good clear thinking from the pilots!! Three cheers for them!
It's amazing that they landed safely.
I really like your storytelling, first, explaining what happened with the information available to the pilots at the time of the incident. Then explain the results of the investigation.
Love it!
What an amazing simulation! Great story. Bad thing when an airplane operator can no longer have contact with the manufacturer. Same thing is happening in Russia now. They have also a lot of US made planes, but can no longer buy spare parts due to the sanctions.
Sanctions should never be applied where there are innocent lives at stake, as in these sorts of situations. Not that Iran cares about that.
@@johnrroberts7900 the sanctions will continue until the people revolt.
@@johnrroberts7900 so how isn't millions of Ukrainians innocent regarding the illegal Russian invasion of their peaceful independent nation?
@@OmmerSyssel No-one is questioning that, and if I lived there, at 77 I would NOT flee to another country but offer my services to the Ukraine army and fight till there was no breath left in my arthritis-ravaged body. What I am saying is that if applying sanctions costs innocent lives then these are wasted lives that could be used to fight in the war effort, rather than being obliterated into little pieces in some tin can hitting the ground.
Russia is big enough and has sufficient control of resources that it laughs at sanctions. Americans printed money without gold backing to the extent that fifty-one years later, US Total Debt is coming up to $93 trillion; Russia can certainly print some money to tide them over during some local conflict.
interestingly it seems Russia reach an agreement with to Iran on maintaining its western aircraft in Iran
Correction: The FAA issues Airworthiness Directives (ADs), not the manufacturer. What the manufacturer DOES issue is called a Service Bulletin, which is not regulatory. Usually, if a problem is found in an aircraft or engine, the manufacturer will issue a service bulletin, then the FAA will follow up soon after with an Airworthiness Directive.
Thanks go to you for this piece of information . We need you big time and thats for sure. The public would have never known it . I can't even begin to think of how many lives you have saved and will save. . Thank you very muck . Keep up the good work . I'm a big fan for sure and have been a long time now,
Congrats on your 200th video ✨👋🤩
Excessive vibrations on # 3 engine written up by previous flight crews several times, and yet, pilots continued to accept the aircraft. It was just a matter of time. These people were incredibly lucky.
Btw, the aircraft shown in the video is a 747-8.
Mar-Han. And it’s always been an aviation nerd’s paradise. They had bookable passenger 707s until 2013. Miraculous! And the nicest country
"The nicest country" meets the most tyrannical and maniacal government.
@@eddiebaker3267 widespread phenomenon these days alas
Congratulations on your 200th video
If this aircraft was powered by GE CF6 50s as illustrated, it would have been a 747 200 or 300, as the 400 series had CF6 80s if GE powered.
It was actually a 300 series.
EP-MNE - MSN 23480
Great video as always! Ps: if you want to see some MD-82s we have a couple here in Bulgaria!
The 747 is NOT fly by wire. The pilots have direct control of the control surfaces via wires and pulleys assisted by the hydraulic systems. Good vid otherwise.
Governments may have issues, but major kudos to the crew, and I'm glad everyone made it ok.
Absolutely the economic sanctions affected the airworthiness of the aircraft. Iran has been dealing with this same issue for many years for their fleet of F-14s, F-4s, F-5s, and C-130s. They've used a combination of indigenous production and black-market sourcing of repair parts and expendables. Russia is looking as this same issue right now.
Iran having nuclear weapons is scarier than this alternately unavoidable disaster.
Great video!😸
What magnificent airmanship,those pilots did a fine job 👏 👍
Great video
Well, better a 747 than one of those smaller two engine planes
Sanctions had zero to do with this. It was a simple case of human error in taking a part out of use. As you stated, they did the tests and found it faulty. It just got accidentally put back in the parts bin. I'm not saying this happens all the time and it definitely isn't good. But it does happen. And it wouldn't have mattered if they had 10 brand-new fans on the shelf. The first instinct is to use good used parts first to get the most out of your investment. Hell, I'll lay good money the Boeing themselves have had almost the exact same thing happen to them at times.
Well they had the MAX.
@@ljre3397 Not really similar... design defects and defective parts happen in different ways.
@Karamjeet Bedi I worked at Boeing for 36 years. I’ve seen it all, including installing rejected parts. Look at the issues they’re having in Charleston!
@Karamjeet Bedi You’re kind of naive, but I’ll forgive it since you’re from Winnipeg. We did receiving inspection on Winnipeg assemblies and found plenty of rejectable conditions. What aboot that, eh?
@Karamjeet Bedi LMAO! It sounds like you’re guilty about something. I was in management and know exactly what you produced. We did a LOT of rework on Winnipeg assemblies. Perhaps you forget how much work we took out of Winnipeg because of schedule and quality issues. But that probably has nothing to do with you. Just keep those toilets clean.
So-so nice to see they got back safe!!
Kudos to the pilots!
Great video as usual!
Could you possibly do Southwest 1455 some day?
Kudos to the flight crew for keeping that aircraft in proper trim and getting it back down into the runway. They accomplished this via the narrowest of margins. Thank you, Mini Air Crash Investigation!
They definitely had a lot of luck in this misfortune
Thanks I wasn't aware of this accident !!!!! very interesting.
Really interesting as always. I hope and pray they get the correct spare parts for their aircraft fleets.
Sounded to me like there was already more prayer than careful engineering.
@@Allan_son Oh! You’re an engineer, are you?
While they had sanctions they were not prohibited from the air worthiness directives, they knew or should have known to undertake the inspections. If they did not have access to parts, then don’t fly the plane. That’s what responsibility is all about.
Off topic but I geeked out at the F-14 Tomahawks clips at the start, huge fan of that plane because of a certain movie. Also, it's so scary how this almost ended up in tragedy. Thank goodness that they all were okay.
Tomcats not Tomahawks
"Abnormal vibrations in engine #3".
Pilots: "LGTM, let's continue climbing" 🗿
Pretty sure it was 747-300 EP-MNE, not a -400
Great video, as usual.
You may want to look into the crash of Falcon operated by IRGC on Jan 9 2006. That mysterious incident has a lot to be unfolded..
Again, hat's off to some good flying by the crew
Incredible Survival Story! 🤯
the fault lies not with the sanctions, rather with the government being sanctioned. focus! good vid, as usual.
I don't think nyone in their right mind would visit Iran from the West to go plane spotting
This is INCREDIBLY HELPFUL for a story I’m writing!! Thanks so much!
Also, anyone reminded of Qantas 32??
Tha fault lies squarely on the engineering section for letting a part deemed faulty back into service, also the airline management.
Wow the crew and pax on this girl had a very close shave with this incident, it could have gone really badly wrong in a few seconds more and then this wouldn’t be such a happy ending video. Yes the sanctions did have an impact on this incident so did the lack of maintenance communications on the fault with the vibrations.
2:41 - If you lose your hydraulic system, you're gonna have a bad day.
Credit goes to the skill of the pilots in dealing with such a difficult situation.
MAI, I think it is a case of extending the life of parts and a lack of communication with Boeing.
War and politics can inhibit proper safeguards.
Thanks for your great report
Awesome piloting! 100% kudos to the flight crew. Sanctions are stupid and only ever affect ordinary people
Amazing pilots
Perhaps a different title: the engines were ripped part. The title suggests that the aircraft was torn up…
Obviously lack of access to parts was a major contributing factor, but whoever signed off on allowing the part to be used at all (instead of scrapped) is liable.
Probably just some guy covering his ass ("it'll be fine, probably") so his boss's ass is covered too. Was it really that important that this plane had to fly at the time at the very probable expense of lives?
Not a good idea to tout travel to Iran... for any reason.
Issue with engine on takeoff in a large aircraft? Nah, it'll be fine.
"Just glue a penny to the disk. That'll stop the vibrations."-- maintenance supervisor
Sorry, no.
I think the sanctions played a role, but the big snaffu was the lack of communication that led to the installment of the faulty part inspite of it being slated for scrapping. Fantastic pilots! So many of these people are heroes in the truest sense!
Excellent pilots! And if Boeing really wanted to do business with Iran they would just "launder" them, basically just daisy chain access to their services through a series of other companies in various other countries in a way that would enable them to circumvent the sanctions. That's obviously being done on some level anyway or Iran would've never been able to obtain a Boeing in the first place, or any other imported consumer goods either.
I don't know. How applicable is the Italian tune up to a multi engined jet passenger aircraft?
@@Rapscallion2009 That is an interesting question. And hopefully I have an interesting answer. I would imagine that there are certifications which can be obtained from Boeing. Presumably those certifications would be universal, meaning that anyone from any country in the world could theoretically obtain them, even from countries not constrained by the sanctions against Iran. So it would probably have less to do with the nationality of whoever is servicing Iran's planes than whether they were qualified to perform the work in the first place.
"Italian Tune-up" just means taking a car for a high-speed drive to clear out carbon deposits in the engine. I was making the point (in a semi light-hearted way) that it seems odd to "press on" when an engine shows 5 times the level of vibration, compared to it's neighbours.
You're right about the maintenance certifications. And it's going to be a massive problem for Russian airlines for the foreseeable future.
@@Rapscallion2009 My bad 😂
It has been happening but solely done by the Iranians. Many shell companies in countries like Armenia, Iraq, Ukraine, Kazakhstan, Turkey, etc. are utilized to obtain aircrafts and parts which are then used in Iran. Look up "Blue air armenia, Smile air, Al-Naser", these are just a few.
And if Iran was a responsible member of the world community, they'd have access to parts and technical advice.
such a nice story: pilots real heroes...
@4:55 you said the reason for engine failure was "unfathomable" but 30 seconds later you said they fathomed it just fine (the rear low pressure turbine failed). Engine failure is pretty dramatic, no need to try to amp it up with "unfathomable" and "ripped apart"
It is extremely disturbing that an airline ignores Airworthiness Directives and Service Bulletins and fails to adhere to established safety practices and standards.
However, it being Iran, its hardly surprising that they're this bad.
To fly on any Iranian airline is to endanger oneself unnecessarily...
Very true about how weird it is that no one really knows about this. This is the first Ive heard of it.
Love the narration without diminishing anyone. Not meaning to nitpick and I have no idea in these matters. Having seen a 747-400 I don't recall if it had serrated nacelles and exhausts. 5:38 the sim shows these. 4:46 the actual photo shows no serrations. Pls correct me if I'm wrong
At the beginning of the simulation, he has a graphic that states that the plane shown is a 747-8, rather than a 747-400 like the accident aircraft
@@cdrematt The accident aircraft was a 300 (formerly UTA's) in reality, not a 400.
Great video, you're very good at telling the whole story in a way that non-technical people can understand, and in a way that keeps the video interesting. Seems obvious that sanctions did play a part in this near disaster. Sanctions are an act of war, a terrorist act. Sanctions rarely hurt the leaders of a country, but they always hurt the people of that country. I wish the US would never resort to sanctions again.
They did well to get it back on the ground under a critical situation!
Is that the right way to line up a runway in simulator?
Not getting the correct link after eg the Pakistan one mentioned?
Autopilot:
“Nope”
Computer says: “No”
“(I am not going to fly this mess of a broken plane and get the blame if anything at all goes wrong. I am not paid enough for that. Not my clowns, not my circus!)”
Mass vibration on engine number 4. Meh, no big deal! Fly on.
That is simply amazing……a 747 is “ripped apart” …….and it still flys !?
Outstanding pilots .
Mini!!!
Mega!
Midi!
Jiga!
The EP-MNE is a 747-300, not a 747-400 as you state around 00:36. MSN 23480
One of the best aircraft ever made
Sanctions kill. Thanks for covering this.
I saw 707 two weeks ago but luckily it was taxing....🤯
Why is it always engine 4 lol and when you mentioned old planes flying in middle east I think it's the hot weather so it won't require as much maintenance
I think its more so the dry desert and not so much heat
Anybody else understood "Mayhem Air"?
That's exactly how the cc's displayed it. Rather amusing, and fitting,
If Iran played nicer on the playground they’d have better access to all the toys. That’s my opinion on this.
a DC 3 is fly by wire or do we call it cable?
Cables. Def not FBW
Wire cables :)
Actually the company puts out an Alert Service Bulletin's not AD's. Its the regulatory authority (FAA, EASA, etc) that releases an AD if it is warranted.
I'm sure we'll see stuff like this in Russia soon. Keep Watching!
Grounded planes don't have accidents. In my opinion, flying a plane with a worn out part because you can't replace it under a sanctions regime is unacceptable and costs lives. Park the plane if necessary and come up with a better solution.
A case of bad piloting- they should have put 3 into idle at the first sign of high vibration.
Ru a pilot?
is there any specific reason for the pilots NOT to just shut down engine 3 when its giving abnormal readings? if it has to do w restarting an engine midair being more difficult, they coulda still just dropped engine 3 to minimum power to see if that would get vibrations under acceptable limits. like i kno these planes r designed to still be flyable on a single engine, i dont see any drawbacks to shutting down an acting-up engine when its one of FOUR.
Wow
2:00 i just realized the little plate right above the displays says “subscribe”
_talks about iran being a great place for avgeeks_
_also hopes no one watching will notice what 747 variant used in the video_
Excellent video - not an incident I’d seen or heard of before. People should think a bit when they put sanctions on a country! It may be their own innocent citizens who gets killed as a result. The vast majority of people have no involvement in stores of nuclear weapons and just want to get on with their lives. Most people don’t want to be at war. It’s usually the leaders if a nation, safe in their ivory towers who inadvertently put lives at risk with measures such as these.
I'm sure Iran REALLY doesn't want to be a mecca for old aircraft nerds!
Just a small correction
It’s read Maahaan air even though it is written as Mahan Air
Here in just under 120 seconds
TNX GOOD brother good business ok thanks
Did a qantas a380 had the same issue but instead of be a ge engine it was a rolls Royce engine
Why have engine vibration sensors and indicators if you don't take any notice of them?
Turbo-fans spin at fantastic speeds so perfect balance is essential or they self-destruct, after all that's all they really are: a series of turbines pressurising air fed thru a kero burner.