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00:00In the skies over Portugal
00:01What's happening?
00:04I have no control
00:05The pilots of a passenger jet
00:08Are in the fight of their lives
00:10Mayday, mayday, mayday
00:11I have never seen such an abrupt
00:14Drop in altitude in an airplane
00:15This flight
00:19Was the rollercoaster ride from hell
00:21The crew is forced
00:24To make an unthinkable decision
00:25I think we have to ditch
00:27That's very unlikely
00:30That they would have had a good outcome
00:31When investigators
00:34Pour over the plane's history
00:35This is confusing
00:37They discover critical evidence
00:39That the plane was impossible to control
00:41That's one big mistake
00:44What really surprised us
00:47Was the fact that no one really noticed
00:50Mayday, mayday
00:53Air Astana flight 1388 prepares for takeoff
01:19From Alverka do Ribatejo
01:21An airbase 15 miles northeast of Lisbon, Portugal
01:24Before takeoff checklist
01:27Roger
01:2840-year-old Vyacheslav Ausev is the captain
01:36The veteran pilot has been flying with Air Astana for seven years
01:42Radar
01:44On
01:45The captain of this crew
01:47Had considerable time with Air Astana
01:49Flying this aircraft
01:51On which he had a great deal of experience
01:52He's got 6,000 flight hours
01:54Flaps
01:5632-year-old first officer
01:59Baujan Karasholikov
02:01Is the pilot monitoring
02:02He's been with Air Astana for five years
02:05Set for takeoff
02:08Before takeoff checklist complete
02:11Request takeoff clearance
02:15This flight crew was highly experienced
02:18In the normal commercial operation role
02:20So they were selected because of those strengths
02:24Runway 04
02:26Clear for takeoff
02:27Clear for takeoff
02:29Looking forward to getting back home
02:33To help with the journey
02:36The airline has sent along an extra pilot
02:3926-year-old Sergei Sokolov
02:42That day I was a relief pilot
02:46Because the flight was long
02:47And I could switch my colleague
02:50If somebody tired
02:51After undergoing maintenance work in Portugal
02:55Today's 10-hour flight
02:57Has a stop in Minsk
02:58Before finally reaching Air Astana's home base
03:01Of Almaty, Kazakhstan
03:03There are no paying customers
03:06Onboard flight 1388
03:08Just three maintenance staff
03:10Employed by Air Astana
03:12The three passengers on board
03:15Were made responsible for
03:16Supplying the parts
03:18For their maintenance work in Portugal
03:21They were excited to come home
03:24The recently serviced plane
03:30Is a Brazilian-made Embraer E-190
03:35It is a narrow-bodied
03:37Single-aisle
03:38Twin-engined
03:39Aircraft
03:40Which is used for
03:41Medium-range
03:59E-1
04:00Rotate
04:02The flight takes off
04:07Just after 1.30pm
04:09Let's go home
04:13But seconds later
04:18What the...
04:22The plane hits some turbulence
04:25Causing it to bank unusually hard
04:27To the left
04:28After take-off
04:31First indication was
04:33That aircraft
04:34Began to make a roll
04:36So that is wrong movement
04:38Of airplane
04:39That's not normal
04:40What's happening?
04:44There's something wrong with the yoke
04:46I've never felt anything like this before
04:48I felt that aircraft has too much escalations
04:54And captain looked at me
04:57That we have some problems with flight controls
05:00No warnings or caution messages
05:02No warnings or caution messages
05:02The pilots can't explain the plane's erratic movements
05:07Flight 1388 is in serious trouble
05:10I have no control
05:12Maybe it's the control column
05:14The pilots search for a solution
05:17Engage out the pilot
05:19Autopilot on
05:20It was reasonable
05:23To expect the autopilot
05:25To go
05:26Okay, forget about the control column
05:28I will look after it
05:29Because I've been programmed
05:30For the next phase of flight
05:31Autopilot failed
05:35The pilots are running out of options
05:39They need help
05:41And fast
05:42We were in the clouds
05:43On uncontrollable airplane
05:45In turbulent conditions
05:47This is a mayday
05:51Mayday, mayday, mayday
05:56Climbing to 4,000 feet
05:58On heading 060
06:00Kilo Zulu Romeo 1388
06:03Roger, mayday
06:04Controller Viviana Durao
06:07Receives the distress call from the aircraft
06:09Go ahead with your request
06:13As soon as Erastan departed
06:16They declared mayday on the first contact
06:18We're all trained to deal with these kinds of emergencies
06:22But inevitably your heartbeat goes a little bit faster
06:26And your adrenaline peaks
06:28There's nothing in the quick reference handbook
06:35We have to get back to the airport
06:38Agreed
06:39Astor line 1388
06:42Requesting back to airport
06:43Kilo Zulu Romeo 1388
06:47You can turn left or right as you wish
06:49Heading 280
06:50Roger
06:53But heading back to the airport
06:56Is an enormous challenge
06:58Every time we bank
07:03We lose altitude
07:04You've got to get higher
07:06Turn back
07:07To turn around safely
07:09They need to climb
07:11Or risk hitting terrain when they bank
07:13If you roll excessively
07:14The pitch doesn't actually join much in times of altitude
07:19And in fact
07:20Will allow the aircraft to drop
07:22And that was alarming to say the least
07:25Let's try to control from your side
07:29At the cross
07:31I don't think it's any better
07:38But I'll try to climb
07:39What about the flight computers?
07:42Maybe there's a software
07:43But
07:43The pilots speculate
07:45The problem is related to the replacement
07:47Of four flight computers
07:49Something they learned about prior to takeoff
07:52They knew that there'd been a new software load
08:01For the flight control system
08:02So it's very, very easy
08:05And sensible
08:06To make the conclusion
08:07That this is possibly the result
08:08Of a glitch
08:10In the uploaded software
08:11Prepare to engage direct mode
08:15By engaging direct mode
08:18Pilots can bypass the flight computers
08:20Giving them full control
08:21My controls
08:23Roger
08:24Your controls
08:25Ready to engage direct mode
08:28Engage direct mode
08:29So we roll
08:30The aircraft's performance improves
08:40Let's see if we can get back to Alverka
08:45But the pilot's relief does not last
08:49It's not enough
08:52I don't have enough control
08:54To get us back to the airport
08:55The difficulty this crew had
08:58Was they couldn't steer the airplane in any way
09:01So to get back to the airport
09:03With the best will in the world
09:05Wasn't going to happen
09:06What are we going to do?
09:10With nothing working
09:11And the plane continuing to drop
09:14The crew is faced with a grim option
09:16I think we have to ditch
09:20Ditching means attempting
09:24A very risky landing on water
09:27We were over the big populated city
09:32On uncontrollable airplane
09:34And we could hit the ground at any time
09:38We decided to ditch
09:40This was one thing to stop this aircraft
09:44Request vectors for the ocean
09:46Sergei, take over cons
09:48Enable new help with the throttle
09:51Esteline 1388
09:54Ditching
09:56Request heading for ditching
09:58That is like a bad dream
10:03Yes
10:03Or bad movie
10:05The aircraft is uncontrollable
10:081388
10:10Fly heading 260
10:11I was very concerned
10:15Because I don't think
10:16Any pilot requests
10:17Ditching lightly
10:18So if they thought
10:20That that was their best option
10:21That meant
10:22They were in big trouble
10:231388
10:31You can reach the sea
10:32On a heading of 210
10:33Approximately 36 miles
10:35For the last 18 minutes
10:39Flight 1388
10:40Has been flying erratically
10:42Over Portugal
10:43Unable to reach the Atlantic Ocean
10:45For a ditching
10:46We keep losing altitude
10:49Their biggest struggle
10:52Is keeping the plane stable enough
10:54To reach a safe altitude
10:55Above the clouds
10:56If you can climb above the cloud
11:01Then you do have
11:02That visual horizon again
11:04Which is going to help you
11:05That buys you time
11:07To resolve the problem
11:08And so
11:09Altitude is good
11:11Just when nothing seems to be working
11:14The captain gets an idea
11:15Let's ride the flaps
11:17Give me flaps too
11:19Roger
11:21Flaps too
11:25We keep the flaps standard
11:28It helped us to
11:32Stabilize the aircraft
11:3330 minutes after takeoff
11:41Flight 1388
11:42Finally rises above the clouds
11:4417,000 feet
11:49And we have visual meteorological conditions
11:51That was actually a good sign
11:55Because if they could control the aircraft
11:57Enough to climb over the clouds
11:59They weren't going to crash anytime soon
12:02This was very good news
12:04But then without warning
12:12The plane plummets towards the earth
12:14At 20,000 feet per minute
12:16And we suddenly plunged to the left
12:21And dived with quick descent
12:24Physically it was horrible
12:30For the three passengers on board
12:34It's a rough and terrifying ride
12:36One hour
12:38I had never seen such an abrupt drop in altitude
12:42In an airplane
12:43And this was very scary
12:44Because we had no idea
12:45When they were going to stop
12:46Pull up
12:51Pulling up
12:5240 seconds into the dive
12:55The plane descends below cloud cover
12:57Keep it up
13:07We've got this
13:09Circuit, we need power
13:11During that rapid descent
13:15There would have been slightly less than 1G
13:17One times the force of gravity
13:18But
13:19At the point of which you pull the airplane out of the dive
13:22That
13:24G level
13:25Picks up
13:26And in this case
13:27Almost the fighter pilot levels
13:28The extreme maneuver stresses the airframe to its limit
13:35We heard some cracking
13:38Of the airplane
13:41Of the G-boat
13:42I saw the hill
13:47With the trees in front of us
13:49It was close
13:51The plane holds together
13:558,000 feet in climbing
13:58The pilots pull out of the dive just in time
14:04Well done
14:05Wow
14:14We're out of this nightmare
14:16Okay
14:25Let's try to
14:27Get back on course towards the ocean
14:29That's the line
14:331388
14:34Can you confirm our position in relation to the sea please
14:38If you fly southbound you need to go 36 miles
14:42But the battered aircraft still isn't responding predictably to the crew's inputs
14:47It's not good
14:50I can't get to 220
14:52See if I can stay on this heading
14:551388
14:57We are flying to a storm
15:00Can we get to the sea on our current heading?
15:03The weather was very bad
15:04Very windy
15:04Raining
15:05The cloud ceiling was very low
15:07If you can fly westbound you will reach the sea
15:1135 minutes into the flight
15:21Air traffic control calls the Portuguese Air Force for help
15:24The Air Astana was still in an area with very bad weather
15:28They were having trouble navigating
15:30And so we hope that with the guidance of the F-16s
15:34They could reach an area with better weather conditions
15:36Lieutenant Colonel Nuno Monteiro is one of two F-16 pilots sent to guide the aircraft
15:44To better weather and a place to ditch safely
15:47It was the worst day in terms of weather
15:53I was in the squadron
15:56And I knew that if the bell would ring that day
16:01We had to act fast
16:03But can the F-16s reach flight 1388 in time to help?
16:10Almost an hour into their trip
16:12Flight 1388 awaits help from two Portuguese fighter jets
16:16Still climbing
16:22Anybody need water?
16:26But the pilots are exhausted
16:28It was very hard for us
16:35Physically and emotionally
16:38Can one of you bring us some water up here please?
16:46Your controls
16:59My controls
17:00What do you know about the maintenance that was done on this aircraft?
17:13They did a lot of work
17:15Replaced some parts too
17:17Anything flight control related?
17:22We ordered new aileron cables
17:23New aileron cables?
17:26When we learned that aileron cables were changed
17:30We realized the possible cause of the problem
17:34Ailerons are flight control surfaces on the rear edge of each wing
17:39They hinge up and down to help control an aircraft's roll
17:43Let's check them
17:49Let's check them
17:49I've got visuals on the right wing
18:03Inputing aileron
18:03Inputing ailerons right
18:06As the captain turns the control column to the right
18:10The right wing aileron should lift
18:13Aileron going down
18:16Turning left
18:18That's wrong
18:21Let's try the reverse
18:23Let's try the reverse
18:24Inputing aileron left
18:26Inputing aileron left
18:27We put inputs and we realized that this aileron is responding opposite
18:43The ailerons are reversed
18:45The ailerons are reversed
18:47With opposite inputs we might be able to control the aircraft
18:51Now we know what's happening
18:55Let's start to work with this
18:57Ok, let's fly this aircraft oppositely
18:59If you want to turn left, turn to the right
19:01It's a bit better but still hard to fly
19:03This is going to take some getting used to
19:05Again, we're going to take some getting used to
19:09This is going to take some getting used to
19:11Against his instincts and muscle memory
19:15The captain tries to keep the plane's wings level
19:18And climb to better weather
19:20You have to learn a completely different process
19:24Against the ingrained teaching you've already had
19:27And that's very difficult
19:3061 minutes into the flight
19:32Help finally arrives
19:34Pass the line 1388
19:36You have two S-16s reaching your position
19:39Copy that
19:41Zero Zero Romeo
19:43This is Pushing's air defense
19:45Bullet 21
19:46How can we assist?
19:48The altitude having speed
19:52Were far from being stable
19:54And I have a lot of doubts at this moment
19:57What can we do to help and withstand a flight?
20:03We have a flight control problem
20:05No wing and no physicality
20:07Attaining flight level 140 westbound
20:11And will make ditching on sea
20:12I thought, come again?
20:16I've never heard this call in my life as a pilot
20:22And I've been an aviator for the past 25 years
20:26I fear for them
20:28I fear for them
20:29But given the weather
20:32Would they even survive a ditching in the ocean?
20:36If the sea is very rough
20:37And you're trying to land across
20:40Three meters or so of swell
20:42That's very unlikely
20:44That they would have had a good outcome
20:45Lieutenant Colonel Monteiro
20:48Proposes a different plan
20:50If you have 70 miles of fuel
20:52You can try a beija
20:53The closest airport with good weather
20:58Is beija
20:59A military airport 70 miles to the south
21:02If you follow the F-16s
21:05Do you think we could land this day?
21:07We have enough fuel
21:07Let's try
21:10Now we could stably climb
21:15Above the clouds
21:17F-16 means we are not alone in the sky
21:20And F-16 can lead us
21:23To airport with a better weather
21:26The aircraft is a little bit more controllable
21:35Confirmed
21:38Can you confirm heading for beija airport?
21:48Beija is a suitable aerodrome heading 195
21:50Flight heading 195
21:53Okay
21:55Let's see if we can land this thing
21:57Using the F-16 on their left
22:01As a visual reference
22:02Flight 1388 heads to beija airfield
22:05Affirmative
22:13Thank you for helping sir
22:16We disregarded the ditching
22:18Because now we at least know how to fly this aircraft
22:21Now we need to land it
22:23Now we have chance to survive
22:27When you're flying oppositely
22:32It's really hard to keep it straight and level 100% of the time
22:37We understood that landing will not be easy
22:40We are now six miles from runway
22:43After 15 minutes of flying towards beija airfield
22:48The crew begins to configure the plane for a challenging landing
22:52Flaps full
22:54Flaps full
22:55Watch out
23:08But the stability of the aircraft gets worse
23:11We flew Flaps 2
23:14Flaps 2
23:15And now Flaps 5
23:16Landing gear down
23:17So this conditions is new for this airplane
23:20So it means you have to learn to fly it again
23:24With the ailerons reversed
23:26Flight 1388 is almost impossible to control
23:29Both F-16s position themselves behind the plane
23:33Giving the crew plenty of space
23:35Without distraction
23:36One thousand feet
23:42We got this
23:44Guys
23:45Support me and say yes, yes
23:48You're doing right
23:48Everything will, okay
23:50We will survive
23:51Less than a thousand feet from the runway
24:03The pilots struggle to keep the plane level
24:06With the low speed on the approach
24:09You have to have minor inputs
24:12On the yoke
24:13And it's really difficult
24:15The aircraft begins to veer away from the runway
24:19Go around
24:21Going around
24:22It's too dangerous to put the plane down
24:25They abort the landing
24:27I don't think I can do this
24:35You have to try something else
24:38The pilots are determined to try again
24:41But can they make it?
24:45I looked at the guys
24:46And I saw that we all wanted to solve this problem
24:50And bring this aircraft to the ground
24:52After nearly two hours in the air
25:02And two unsuccessful landing attempts
25:05Flight 1388 flies towards the runway again
25:08Turning left
25:12Heading 189
25:14Going to take us back in
25:16Roger
25:17With the captain and the first officer exhausted
25:21The relief pilot takes the controls for the third landing attempt
25:25That's like in football
25:28When you need a win goal
25:30You change the player
25:33I'm going to try and get away from you
25:36Be ready for anything
25:37I was less tired
25:39But I realized that it's really difficult to control the airplane
25:42There's a thousand
25:49Watch for the right roll as we get down
25:52One thousand
25:54We're drifting too far to the left
25:59Trying to get back to center
26:01A mile from the runway
26:07The weather impedes the landing attempt
26:10The wind conditions changed
26:13The airplane started to deviate
26:16Again to the left
26:18The captain quickly improvises an alternate plan
26:22We can make it to the other runway there
26:24One nine left
26:25I see it
26:27I'll try
26:27Can we land on the left runway?
26:31Confirmed
26:32Clear to land on left runway
26:33Roger
26:40Here we go
26:42Here we go
26:42Here we go
27:10After a grueling two hours in the air
27:12Flight 1388 lands safely in Beja
27:15We did it
27:21Through teamwork and determination
27:32The crew has made a stunning landing
27:34I was happy
27:37The flight is finished
27:39Aircraft brought in to stop
27:41And we finally can say
27:43We've done it
27:45It was one of the happiest moments in my life
27:53As a military pilot
27:55I felt relieved
27:56And I felt extremely thankful
27:59To see that aircraft on the ground
28:01The only injury is a sprained ankle
28:09To one of the maintenance staff
28:11I felt relieved
28:13I was very happy
28:14That we made it
28:16And we landed the aircraft
28:17In one piece
28:20But now it's up to Portuguese
28:24Air and rail accident investigators
28:26To find out why it happened at all
28:28Within two hours of landing
28:31Investigators from the Portuguese
28:33Safety Investigation Authority
28:34Arrive at Beja Air Base
28:36Jose Figueiredo is the lead investigator
28:41Overseeing the investigation
28:42Get the seats in one piece
28:45We knew that something was wrong
28:49Really wrong with the aircraft
28:51Investigators examine the aircraft
28:54For signs of damage
28:55Nose looks fine
28:57Check this out
29:01Deformations
29:04There wasn't any visible damage
29:11As we approached the aircraft
29:12However, we found wrinkles
29:15On the surface of the fuselage
29:18And on the leading edge of the wing
29:20The damage indicates that Flight 1388
29:24Suffered extreme forces in flight
29:26I can't believe they landed this plane
29:30The incident is declared an accident
29:33Because of the severity of the damage
29:35The aircraft is a write-off
29:38The definition of an accident
29:41Typically involves
29:42The destruction of the aircraft
29:44And fatalities
29:45But we decided to classify this event
29:48An accident
29:49Rather than an incident
29:50Because we felt it was important
29:52To draw attention to what happens here
29:54Let's see what the crew can tell us
29:56We call the control tower
29:59At Beja
30:00And request the pilots
30:01To stay on the aircraft
30:03Until we arrive there
30:04It was key for us
30:08To speak to the pilots
30:09So that we could get
30:10A first-hand account
30:12Of what had occurred
30:13And to try and get
30:14As much valuable information
30:16From them as possible
30:17When did you realize
30:18There was a problem?
30:19Immediately after takeoff
30:21The plane started rolling
30:23Back and forth
30:24What's happening?
30:28There's something wrong
30:29With the yoke
30:29I've never felt anything
30:31Like this before
30:31There's a total disconnect
30:34Between the control yoke
30:36And the aircraft
30:36Were there any alerts
30:39Or indications
30:39Of what went wrong?
30:41No
30:41But one of the maintenance team
30:43On board
30:44Remembers ordering new
30:45Aileron cables
30:46For the aircraft
30:47So we did the visual inspection
30:49And it seems that
30:50Ailerons were moving
30:51In the reverse
30:52We couldn't believe
30:54It when the crew told us
30:55We wanted to perform
30:57An operational test
30:58To confirm
30:59For ourselves
31:00What was the real issue
31:01Okay show us
31:04The left aileron
31:05Copy
31:11Investigators test
31:14The ailerons
31:14To verify that
31:15They were moving
31:16In opposite directions
31:17Yoke to the left
31:22Two control surfaces
31:26Work in tandem
31:27To turn the plane
31:28Both the aileron
31:30And the spoiler
31:31Must move upwards
31:32On the wing
31:32To turn the plane
31:33To the left
31:34The spoiler's fine
31:44But the left aileron
31:45Moved down
31:46Instead of up
31:46It's reverse
31:48It's as if
31:51The steering wheel
31:52Of your car
31:53Was giving
31:54Inverted commands
31:55Or the handlebar
31:57Of your bicycle
31:58Was inverted as well
31:59The plane would have been
32:00Next to impossible
32:01To control
32:02The next big question
32:04The investigation
32:05Was facing
32:06Was how did this happen
32:07Maintenance began
32:14On October 2nd
32:15Investigators review
32:18Flight 1388's maintenance records
32:21For an explanation
32:22Why the ailerons
32:23Were inverted
32:24And it continued up
32:27Until the morning
32:27Of the accident
32:28The aircraft was serviced
32:31The aircraft was serviced in Portugal
32:31For a month
32:32By a third party company
32:34Owned by Embraer
32:35When airlines don't have
32:38The maintenance facilities
32:39Capable of doing the deep servicing
32:41They contract external suppliers
32:44And that was the case here
32:46It was necessary to find out
32:49What had happened
32:50During the month or so
32:51That the aircraft
32:52Was in maintenance
32:53Investigators meet
32:55With the maintenance supervisor
32:56To find out more
32:58About the work
32:58Performed on the aircraft
33:00Why did the plane require
33:02Aileron being in service
33:03The aileron cables were old
33:06When commanded
33:08Four aileron cables
33:10Move the ailerons up
33:11And down
33:12Each cable moves
33:13Through a pulley system
33:14Cable friction
33:16On the pulleys
33:17Can cause premature wear
33:18We replaced the pulley system
33:21With a frictionless one
33:22To prevent future wear and tear
33:24Operators said
33:26Complaining to Embraer
33:27About the premature wear
33:28On the stainless steel cables
33:30So Embraer came up
33:31With the design fixed
33:33To this issue
33:34And the aircraft
33:35Was being refitted
33:37With the new
33:37Contactless system
33:38Says here
33:41The aileron maintenance
33:42Began on October 9th
33:44Correct
33:47The structure steam
33:49Started by removing
33:50The old pulleys and cables
33:51The new installation
33:58Uses mostly square metal frames
34:00Instead of pulleys
34:01To guide the cables
34:03Through the wing
34:03This minimizes
34:05Any wear
34:06Caused by friction
34:07And what are the
34:17Structures team do next
34:17They reinstalled the old cables
34:19As a temporary measure
34:21Until the flight control team
34:22Installed the new cables
34:23The structures team
34:25Reinstalled the old cables
34:27Once they had finished
34:28Replacing the hardware
34:29Because that is
34:31What the procedures
34:32Required them to do
34:33They were following
34:34The instructions
34:34Is it possible
34:38That they inverted
34:39The old cables
34:39When they reinstalled them
34:41It's possible
34:44I'm told
34:45They had a hard time
34:46Following the instructions
34:47Where do they struggle
34:53With the instructions
34:54Right here
34:59They identify
35:02A key section
35:03Where the structures team
35:04Had difficulty
35:05Understanding the instructions
35:06This looks like
35:13The reverse zone
35:14The reverse zone
35:17Is a two meter long
35:18Section inside the wing
35:20Where the cable routing
35:21Changes from horizontal
35:22To vertical
35:24Is this confusing
35:27Did the technician
35:30Ask for help?
35:31I'm told he asked
35:32Another engineer
35:33On the team
35:33The structure engineer
35:40Consulted a colleague
35:40Who had also
35:41Limited experience
35:42And the manual instructions
35:44Were quite difficult
35:46To follow
35:46Did you test the reinstallation?
35:50They weren't required to
35:51This kind of work
35:53Required extensive experience
35:56So without surprise
35:57They did it incorrectly
35:58Not only did the structures team
36:01Incorrectly reinstall
36:03The old cables
36:04They never tested
36:05The ailerons
36:06To confirm
36:07That they installed
36:08Them correctly
36:08The structure team
36:11Were informed
36:11That the flight control team
36:13Would came later
36:14To replace those cables
36:15Did the flight control team
36:17Catch the error?
36:20Not likely
36:20I'm told they installed
36:22The new cables
36:22Following the same routing
36:23The flight control team
36:27Replaced the cables
36:28One by one
36:29Installing the new cables
36:31As a direct replacement
36:32And without verifying
36:33The previous routing
36:34So why didn't the flight control team
36:39Discover the mistake
36:40After they finished the installation
36:42And then tested the ailerons?
36:45Investigators check
36:46The fault history database
36:48For answers
36:49The fault history database
36:52Records data
36:54About the maintenance work
36:56That was done on the aircraft
36:58So it will tell us
36:59For example
37:00When the aircraft was powered up
37:01When it was powered down
37:03What systems were operating
37:05And at what time
37:06The installation of the new cables
37:10Was completed on
37:12October the 17th
37:13October the 17th
37:14Well according to this
37:15They couldn't test the ailerons
37:16On the 17th
37:17The plane was still under maintenance
37:19The investigation knew
37:23That the ailerons
37:24Had not been checked
37:25On that day
37:26Because you need to power up
37:28The aircraft
37:28And from the data
37:30That we could see
37:31In the fault history database
37:32This never happened
37:33When did they complete
37:36The maintenance?
37:39On October 26th
37:40They had finished
37:41The additional maintenance
37:42And powered up the plane
37:42Did they test the ailerons then?
37:45It doesn't look like they could
37:47Well they got a fault warning
37:50In the cockpit
37:50Flight control no dispatch
37:53Flight control no dispatch
37:58Is a catch all message
37:59Which alerts the flight crew
38:01That something needs attention
38:03Before going flying
38:04It could be a sensor
38:06It could be a connection
38:07That is loose
38:08They didn't know
38:11What caused the fault
38:12Regardless
38:14They can't fly
38:15With the error message
38:16While the error message
38:18Had nothing to do
38:19With the inverted aileron cables
38:21It diverted technicians
38:22Attention away
38:23From the aileron repair
38:25And so when they experienced
38:28The flight control no dispatch
38:29This put a lot of pressure
38:31On all of the maintenance technicians
38:33What did you do
38:40When your crew got the flight control
38:41No dispatch message?
38:44Investigators delve
38:45Into how the maintenance team
38:46Of flight 1388
38:48Dealt with a no fly error message
38:50After completing maintenance work
38:52On the plane
38:53I dispatched the team
38:55To investigate
38:56Were they able to determine the issue
39:00And clear the problem?
39:03No
39:04The maintenance team
39:10Started by referring to the manuals
39:12They also asked support
39:14From the manufacturer
39:15However all of these efforts
39:17Had a limited result
39:19How did they resolve
39:22The error message?
39:26They replaced the flight control computers
39:28With no success
39:32Resolving the error message
39:34The maintenance team
39:35Considers the possibility
39:36That the issue involves
39:38The flight control computers
39:39These were new computers
39:44So these being new computers
39:48They had clean memories
39:50When they powered up the plane
39:51The error message was gone
39:53When those four flight control modules
39:57Were replaced
39:58The message disappeared
40:00And the plane was cleared to fly
40:02Did you test the ailerons after that?
40:06Sure did
40:07We checked all the flight controls
40:08And what about a visual check?
40:11Absolutely
40:11They were moving up and down
40:13No problem
40:14Did they check to see
40:21That they were moving
40:21In the right direction?
40:33I'm sorry
40:33I'm not sure if they did or not
40:34The operational checks
40:38Were performed
40:39However
40:41No one really noticed
40:42That despite
40:44The movement of the ailerons
40:46That in fact
40:47They were moving
40:48In the opposite direction
40:50To what is being commanded
40:51Thanks for your time
40:54That's one big mistake
41:04That nobody caught
41:05Investigators finally understand
41:11What happened to Air Astana
41:13Flight 1388
41:14The groundwork for the terrifying flight
41:18Was laid a month earlier
41:19When a maintenance team
41:20Inverted the aileron cables
41:22Because the instructions
41:23Were confusing
41:24When they prepare
41:26To test the aileron cables
41:28They get distracted
41:29By a mysterious error message
41:31Maintenance technicians
41:35Clear the error message
41:36By replacing flight computers
41:38But when they check
41:43That the ailerons are working
41:44They never look to see
41:46What direction
41:47They're moving
41:47What's happening?
41:52There's something wrong
41:53With the joke
41:53I've never felt anything
41:55Like this before
41:56This chain of events
41:58Sets flight 1388
42:00On a harrowing
42:01116 minute flight
42:03There's a thousand
42:05Watch for the right roll
42:07As we get down
42:08One thousand?
42:12Remarkably
42:13They are able to overcome
42:14Their difficulties
42:15Through focus
42:16And good teamwork
42:17I've got you in
42:21Do you have a visual of me?
42:24The aid of an experienced
42:25Fighter pilot
42:26Finally helps them
42:27To land the plane
42:28The situation looked dire
42:35For a long time
42:36And knowing that
42:37They had landed safely
42:38Was just
42:39A tremendous relief
42:40The really impressive thing
42:44Is that this crew
42:45Who were not experienced
42:47Flight test pilots
42:48Who'd come across
42:49Completely
42:50Non-standard situations before
42:53Just how quickly
42:55They settled down
42:56To work it through
42:57Logically
42:58They did really well
43:01As a result
43:04Of this accident
43:05And investigation
43:06Several safety changes
43:08Are made
43:08There were a lot of changes
43:13At Embraer
43:13In terms of revising
43:15Their manuals
43:16And making the instructions
43:17Much clearer
43:18When it comes to replacing
43:20The aileron control cables
43:21Air Astana
43:25Installed more robust procedures
43:27For checking aircraft
43:28After completing maintenance
43:30New procedures
43:33Were made
43:34For checking
43:35The flight controls
43:36Including making sure
43:38The correct movement
43:39Of the ailerons
43:40Maintenance errors
43:42Have occurred
43:44In the past
43:45And I think
43:46What this event
43:48Demonstrates
43:49Is that it underscores
43:51The importance
43:52That all of the stakeholders
43:53Including maintenance
43:54Play
43:55In achieving
43:56Flight safety
43:57The 0
44:105
44:10Is that it?
44:11Rock safety
44:12Is that it?
44:12Follow your
44:13head
44:14Or
44:15Is that it?
44:16Well,
44:17This event
44:18Is that it?
44:19I think
44:19Of course
44:20Will
44:20Do
44:21No
44:21I think
44:21You
44:22I think
44:22I think
44:23There
44:23Are
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