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MD-82 Excursion KMIA

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Old 22nd Jun 2022, 20:54
  #21 (permalink)  
 
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Still curious about what appears to be heavy damage to the radome …

first thought is substantial birdstrike damage …

second a collapsed NLG in combination with a steeper grassy slope than can be seen from the video’s.. with the radome digging in or the radome flipping open when the gear collapsed…

If the approach video is of this flight then the radome appears intact,
and hitting the G/S antenna or other object after the excursion might indeed explain the radome and right wing ‘root’ damage, and the subsequent fire … as posted by fivegirlkit below..


Last edited by A0283; 23rd Jun 2022 at 12:42.
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Old 22nd Jun 2022, 22:00
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My reaction was the ridiculously quick evac from door 3L right into the port engine intake that could hardly have feasibly been shut down by then, that complete absence of slides and the huge delay in opening door 1L.
Do MD83s not even have slides? Surely not?
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Old 22nd Jun 2022, 22:15
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Originally Posted by meleagertoo
Do MD83s not even have slides? Surely not?
My MD-80 series experience was a very long time ago. My recollection is slides with manual girt bars on the forward and rear doors but no slides on the over-wing exits.
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Old 23rd Jun 2022, 03:01
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Is this a long landing followed by a runway excursion? There seems to be heavy braking or defective braking judging by the prolonged smoke. Does anyone know if it was a stable approach?
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Old 23rd Jun 2022, 09:43
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Originally Posted by wheelsright
Is this a long landing followed by a runway excursion? There seems to be heavy braking or defective braking judging by the prolonged smoke. Does anyone know if it was a stable approach?
If the video in post #4 was indeed taken on that actual day then the answer is yes.
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Old 23rd Jun 2022, 11:18
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LH gear collapse, runway excursion, glideslope antenna hit, fuel leak/fire, self evacuation.

In the first 5 seconds of the video in post #1 we can see the right wing high, and the left wing dragging on the ground. Thus it seems that the LH main gear failed (the reason for that will be the root-cause of this accident).
The aircraft departs the runway to the left, hits the glideslope antenna (radome damage and right wing debris), loses its undercarriage when traversing the grass, and has a small fire fed by the right wing fuel tank damage.
Then the video on post #6. The unsupervised passengers next to the over-wing exits then see the smoke and start an evacuation - the engines are still spooling down when the video starts, and normally the captain would not initiate an evacuation with the engines running. Both sides were opened, but it seems the evacuation was only on the left side. Then, some time later (59s into the video) the crew/captain initiates the evacuation command, and door 1L was opened, a few seconds before the fire trucks arrived.

A good outcome.
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Old 23rd Jun 2022, 12:44
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Filming and taking a carry-on - that'll help!
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Old 23rd Jun 2022, 13:50
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Originally Posted by FUMR
Originally Posted by wheelsright
Is this a long landing followed by a runway excursion? There seems to be heavy braking or defective braking judging by the prolonged smoke. Does anyone know if it was a stable approach?
If the video in post #4 was indeed taken on that actual day then the answer is yes.
Do you mean the answer is yes and yes? Or yes and no, or no and yes?
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Old 23rd Jun 2022, 15:41
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Is it just my poor, aging eyes or does the left main gear look like it's not quite straight in the post #4 video prior to touchdown? It might just be the parallax of the recorded image.
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Old 23rd Jun 2022, 18:38
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Originally Posted by DaveReidUK
Do you mean the answer is yes and yes? Or yes and no, or no and yes?
My bad, there were indeed two questions and I was in fact only answering the last one concerning a stable approach. The video in #4 would suggest that it was a stable approach.
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Old 24th Jun 2022, 08:42
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My eyes are not what they used to be, but I do not see what others are seeing. It looks to me that the gear only failed as the aircraft left the runway.

I do see extended wheel smoke prior to excursion suggestive of heavy braking or possible defect. I did not find many clues after a brief look at ATC and ADS-B. Any further clues?
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Old 24th Jun 2022, 11:44
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Passenger carrying luggage on evacuation

Would it be possible to have central locking on overhead bins which is activated on final descent? That would prevent people blocking egress as they try to open overhead bins and block them from carrying luggage on evacuation. It might also stop the carnage of a passengers leaping out of their seats to open the overhead bins before the plane has even reached the gate!!
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Old 24th Jun 2022, 11:58
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Originally Posted by jimworcs
Would it be possible to have central locking on overhead bins which is activated on final descent? That would prevent people blocking egress as they try to open overhead bins and block them from carrying luggage on evacuation. It might also stop the carnage of a passengers leaping out of their seats to open the overhead bins before the plane has even reached the gate!!
In an accident, they would make things even worse. Not going to happen.
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Old 25th Jun 2022, 14:21
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Originally Posted by meleagertoo
My reaction was the ridiculously quick evac from door 3L right into the port engine intake that could hardly have feasibly been shut down by then, that complete absence of slides and the huge delay in opening door 1L.
Do MD83s not even have slides? Surely not?
No such thing as "3L" door. Two doors at the front: Forward Entrance Door (1L), Forward Service Door (1R). At the back: Rear Service Door (2L), and the Aft Entrance Door, which is at the tailcone/aft airstairs. Only ONE door on the right side of jet (1R). All three doors (1L, 1R, and 2L) have evacuation slides. If the aft tailcone is jettisoned, an evacuation slide is activated. Otherwise, rear airstairs are available through the tail.

In addition to the doors, there are four overwing emergency exit "doors," two on each side. On the Mad Dogs I flew (for 18 years... MD-88/90), the emergency overwing exits were not connected to any warning or status light system... which means that if someone decides to open them, you have no indication in the cockpit. The reason it took so long for the left forward (1L) door to open is probably due to the crew performing the Emergency Evacuation checklist... shutting down engines before commanding an evacuation. That implies to me that the people evacuating through the overwing exits did so without direction.
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Old 25th Jun 2022, 16:38
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Originally Posted by Capt Jeff
No such thing as "3L" door. Two doors at the front: Forward Entrance Door (1L), Forward Service Door (1R). At the back: Rear Service Door (2L), and the Aft Entrance Door, which is at the tailcone/aft airstairs. Only ONE door on the right side of jet (1R). All three doors (1L, 1R, and 2L) have evacuation slides. If the aft tailcone is jettisoned, an evacuation slide is activated. Otherwise, rear airstairs are available through the tail.

In addition to the doors, there are four overwing emergency exit "doors," two on each side. On the Mad Dogs I flew (for 18 years... MD-88/90), the emergency overwing exits were not connected to any warning or status light system... which means that if someone decides to open them, you have no indication in the cockpit. The reason it took so long for the left forward (1L) door to open is probably due to the crew performing the Emergency Evacuation checklist... shutting down engines before commanding an evacuation. That implies to me that the people evacuating through the overwing exits did so without direction.
Oh... forgot to add that the overwing exits on the DC-9 and variants do not have slides... the passengers are to slide off the flaps at the trailing edge of the wing.
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Old 25th Jun 2022, 19:10
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Originally Posted by wheelsright
My eyes are not what they used to be, but I do not see what others are seeing. It looks to me that the gear only failed as the aircraft left the runway.

I do see extended wheel smoke prior to excursion suggestive of heavy braking or possible defect. I did not find many clues after a brief look at ATC and ADS-B. Any further clues?
Check again. The port wing is already on the ground before the aircraft veers off the runway.
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Old 26th Jun 2022, 09:01
  #37 (permalink)  
 
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Juan Browne gives his take on this.
Majors on uncommanded evacuation and how the pax may have a different perspective to those at the front.
Whoever took the video looks to be standing four square on the asphalt. Odd what people will risk for 2 seconds of fame.
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Old 8th Jul 2022, 21:13
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So, nothing new about the investigation into this accident...no preliminary report ? I see the wreckage has been moved to another part of the airport.
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Old 9th Jul 2022, 07:54
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Originally Posted by bafanguy
So, nothing new about the investigation into this accident...no preliminary report ? I see the wreckage has been moved to another part of the airport.
Prelim is basically after 30 days … so 20-22 nd of July
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Old 21st Jul 2022, 17:08
  #40 (permalink)  
 
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FYI:

https://aviation-safety.net/database...?id=20220621-1

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