While this is the right action, it’s tragic that it took a fatal accident for that to happen. Line: 192 The captain was the pilot flying and the first officer pilot monitoring. If an engine failure were to put a hole like that in a wing tank, the fuel could ignite (“Fuel tank puncture: Qantas A380 ‘lucky’ to escape catastrophe, say reports” was a headline at the time), making for a quite spectacular and deadly fire. The pilot chose to de-ice the stabilizers only, and took off 22 minutes after the de-icing, which is probably stretching the holdover time. The flight distance is about 951 km or 591 miles and flight time is 1 hours 35 minutes. The ATSB and AAIB would also be possible but there’s a prior relationship there. Bek Air Flight 2100 was a domestic passenger flight from Almaty to Nur-Sultan, Kazakhstan, onboard a Fokker 100. 98% Upvoted. A once sleek aircraft broken up and twisted. A Bek Air Fokker 100, registration UP-F1007 performing flight Z9-2100 from Almaty to Nur-Sultan (Kazakhstan) with 93 passengers and 5 crew, departed Almaty's runway 05R at 07:21L (01:21Z) but … I am now totally “winging” it, but if this were to be the case, of course investigation would not reveal any defect. In the SAS 751 accident, passengers reporting these tufts not moving was a clear indication in retrospect that the wings had clear ice on them. This is done by putting a strip in the sample, the colour will change if water is present. As accidents go, this one did not claim a lot of lives, but it has seriously injured a number of people and to every victim or the surviving relatives of those whom died, this crash is as major as they get. Your American Airlines flight should take you from Detroit, MI (DTW-Detroit Metropolitan Wayne County) to Louisville, KY (SDF-Louisville Intl.) Bek Air flight Z9 2100 crashed shortly after take off from Almaty International Airport, the airport confirms. [1][11] It reportedly turned to the right and hit a concrete perimeter fence, before impacting a two-storey building in a residential area, close to the perimeter track, at approximately 7:22 a.m. local time. The plane landed on its belly and glided on the snow travelling 50-55 kph (27-30 knots) through a perimeter fence and then crashed into a two-story house. But what does become a distinct possibility, if not a probability is that this aircraft may not be fully back in service before the end of this year. Security footage of Bek Air flight 2100. Tufts, as mentioned, are not used in modern jet aircraft to my knowledge. The jet, Z92100, is understood to have smashed into a … I do believe that one engine failed for some reason (could be mechanical failure, could have been hit by a heat-seeking missile). The aircraft was unable to climb and crashed into a concrete wall and a vacant building. The movement of the aircraft as it taxies to the holding point can do the trick. Yakov Klebanov, the owner of Bek Air, could have spared one pool service to save flight 2100 HOTLINE MONEY LAUNDERING June 8, 2020 Bek Air, an air­line com­pa­ny known pri­mar­i­ly for 27.12.2019 air … What form of communication existed between ATC and the military, and how this comunication failed, will no doubt be the subject of intense scrutiny. [8][13], Thirteen people, including the captain and first officer, who died in hospital nearly a month after the accident, were killed, and 66 were injured. I have not flown the F70 / F100 so I do not know what form of ice detection has been installed. Line: 107 Message: Undefined variable: user_membership, File: /home/ah0ejbmyowku/public_html/application/views/user/popup_modal.php Yes, the A321 is a bit bigger but not massively so. One of the survivors has stated that he saw ice on the wings and that passengers slipped and fell when disembarking via the wing. Simpler example: blow on a cold window and watch it fog up; humidity in the breath condenses when it hits the much colder surface. The passenger jet, a Fokker-100, had 98 people on board, carrying … Bek Air flight Z9-2100 crashed this morning on takeoff from Almaty, Kazakhstan, killing at least 14 of the 98 people on board (27-12-2019) I’m expecting dewfall at night, I regularly have to clear the rime ice from my car’s windshield after nightfall (or in the morning) even with no rain, since dew precipitates out of the air as it cools. I have been following this sad story for years. The videos show a layer of snow on the airport surface; obviously the air temperature was low. Settings. Essentially, it would come down to knowing that a crash was likely and then choosing between an inevitable crash from a runway overrun or the tiny glimmer of hope that you can gain a few knots and snatch victory from the jaws of defeat. Notify me of follow-up comments by email. I am comparing this to Qantas QF-32, an A388 that had an engine failure on Nov 4th 2010, and an engine part punctured the wing and made a large hole in it. So far, with the data available at this time, I would put my money on insufficient attention to clear ice on the wings. There is a number of CCTV videos from the airport. [15], In late January of 2020, the Aviation Administration of Kazakhstan (AAK) revealed serious safety violations at the airline. The first engine N1 drop was synchronous for both engines, so I’m guessing that was the FO, but the next N1 drop at second 68 happened only on engine 1, and that might have been caused by something like that. But: suppose that there WAS water contamination? If there was even a very thin coat of clear ice, that would well explain what we see in the videos. Any moisture in the air may then condensate on the wings and form water, liquid but possibly undercooled. Bek Air Penerbangan 2100 adalah sebuah penerbangan penumpang domestik dari Almaty ke Nur-Sultan, Kazakhstan, yang menggunakan pesawat Fokker 100 yang jatuh pada 27 Desember 2019 saat lepas … The flight was operated by a Fokker … Certainly the sequence of events that lead to the Tehran crash is far from certain. Ice accumulation would be visible as white. As Mendel pointed out, an abort at high speed is a tough call. As a sidenote, hydracarbons (fuel) burn to heat+H2O+CO2, so jet exhaust always contains water (contrails are actual clouds! Both flight crew were very experienced and used to cold and icing conditions. This, in turn, may have condensated again if the air – and the fuel in the tanks – cooled. This is a great article, masterfully written. Assuming that the dismissal of wake turbulence is valid, it’s pretty simple. Scheduled time of departure from Almaty is 07:05 +06 and scheduled time of arrival in Astana Intl is 08:30 +06. [16], On 17 April 2020, citing the airline's failure to correct the safety violations discovered during the investigation, the AAK recalled the company's air operator's certificate and the airworthiness certificates of its remaining Fokker 100 aircraft. Flightradar24 is a global flight tracking service that provides you with real-time information about thousands of aircraft around the world. Required fields are marked *. ‘Water on the wings may freeze and become clear ice, easy to miss during a casual pre-flight “walk around”.’ Forming really clear ice would take just the right circumstances. And the plane began swinging as a boat. This accident is a bit of a mystery. The weather and freezing conditions were not out of the ordinary for the airfield, which has comprehensive de-icing and anti-icing procedures. Another factor is the actual air temperature, and did it maybe rise above freezing during the day and dropped below zero as night fell? It’s very easy to underestimate the effects of ice on an aircraft. — video footage shows that Bek Air crews don’t usually do walk-arounds or wing checks "[11] Nazarliev continued, "When we took off, the plane began to shake very hard and I knew it was going to fall ... All the people who stepped on the wing fell, because there was ice. The bowsers have clear filter bowls that clearly show water, they are drained and the crew usually will be presented with a sample drawn and tested for water. Function: view, UP-F1007, the aircraft involved in the accident, The wreckage of the aircraft at the crash site, Nursultan Nazarbayev International Airport, "Kazakhstan flight with almost 100 onboard crashes, killing at least 12 people", "Accident: Bek F100 at Almaty on Dec 27th 2019, lost height shortly after takeoff and impacted building after two tailstrikes", "В Казахстане разбился пассажирский самолет", "Kazakhstan Plane Crash Kills at Least 12 People", "Путаницу с количеством жертв при крушении самолета Bek Air признали чиновники", "12 killed, dozens hurt after jetliner crashes in Kazakhstan", "Bek Air UP-F1007 (Fokker 70/100 – MSN 11496) (Ex B-12292 D-AFKC)", "Bek Air flight Z92100 crashes shortly after take off from Almaty", "Fokker 100 Crashes In Kazakhstan Leaving At Least 15 Dead", "Стали известны имена пилотов разбившегося самолета Bek Air", "Survivor describes moment jet crashed into building in Kazakhstan", "Al menos 12 muertos en un accidente de avión de pasajeros en Kazajistán: "Supe que se iba a caer"", "President Tokayev declares 28 December a national day of mourning", "Bek Air grounded after fatal Fokker 100 accident at Almaty", "Kazakhstan's Aviation Administration Reveals Violations in Kazakh Bek Air Operations", "Operations certificate of Kazakhstan's Bek Air recalled following plane crash", The passenger plane crash in Kazakhstan. The engines would have been started but perhaps not sufficiently long enough for the fuel heaters to do their work? Flightradar24 tracks 180,000+ flights, from 1,200+ airlines, … What stands out to me is the feeling that the Captain must have felt when the aircraft responded as it did. The fuel stored in underground tanks may well have been of a different temperature, maybe a few degrees higher. The Boeing Max, no doubt, will be the subject of a few more interesting blogs on this website. It could have caused assymetric power (hence the wobble as evident on the videos) and enough alarm to try to abort the take-off at (too) high speed? New comments cannot be posted and votes cannot … (Or the aircraft hitting the fence?) I would expect Iran to use the French BEA for the recorders and other required support. Jet fuel does not freeze like water. Yes, undercooled water – possible when the air is clear and there is little or no wind – can accumulate on smooth surfaces and freeze nearly instantly when there is something to disturb the equilibrium. The departure took place in the dark. Function: view, File: /home/ah0ejbmyowku/public_html/index.php Chip, Again, it all depends on air temperature, were there significant variations, how much time had elapsed between the aircraft had been refueled and the departure. Bek Air Flight 2100 was a domestic passenger flight from Almaty to Nur-Sultan, Kazakhstan, operated by a Fokker 100 that crashed on 27 December 2019 while taking off from Almaty International Airport. https://sputniknews.com/asia/201912271077882582-bek-air-flight-2100-timeline-of-deadly-kazakhstan-plane-crash-revealed/ A Bek Air Fokker 100 medium-sized twin-turbofan jet airliner en route from … Function: view, File: /home/ah0ejbmyowku/public_html/application/controllers/Main.php The engine power would fluctuate, even surge. I can’t say that I remember the details, but I do remember that he painted a grim picture. The aircraft was also leased to Safi Airways in February 2017, returned to Bek Air, and finally leased to Air Djibouti in December 2018, before being returned again. The aircraft remained in service with Bek Air until the day of the accident, which destroyed it. BEK2100 Flight Tracker - Track the real-time flight status of BEK 2100 live using the FlightStats Global Flight Tracker. Of course, I have no concrete data to back this up in relation to this particular incident. I know everyone is thinking about the loss of Ukraine International Airlines flight PS 752 in Tehran but right now there’s just not enough information for a reasonable discussion, so I’m going to stick with my original subject, which happened a few weeks earlier. Fullscreen. Water on the wings may freeze and become clear ice, easy to miss during a casual pre-flight “walk around”. — Bek Air takes the serial number plates off some of their engines, and the airworthiness of their fleet is poor. ATSB investigators use these laboratories to perform CVR and FDR readouts for occurrences in Australia and overseas.” The CVR is actually an Australian invention! amount of trim input" -- Rudy pointed to this, but it was also my first reaction;…, Just trying to be helpful:... where you have written “Once on the ground, they found that the Cessna 172...etc” you…, Once when I was teaching a young woman to drive a car, with an automatic transmission, I asked her to…, Visiting a young man who had worked for me years before, it came out that he had just been granted…, http://code7700.com/case_study_air_florida_90.htm, https://www.youtube.com/watch?v=hvKRTo9xdsk&feature=emb_logo. However, forming ice that isn’t visible to a quick inspection under whatever angle the ramp lights are at could happen very easily. [1][5] Thirteen people died in the crash, and 66 were injured. ベック・エア 2100便 Bek Air Flight 2100; 2011年に撮影された事故機. 9 comments. Again, this may have caused a difference between the temperature of the wings and the ambient air. We’ll find out more with the passage of time. "[12] The temperature at the time was −12 °C (10 °F) and visibility was 1,000 metres (3,300 ft), with thick fog close to the scene. Which may well result in knock-on effects. Bek Air flight 2100, a Fokker 100, crashed into a building during takeoff from Almaty Airport, Kazakhstan. — the co-pilot did attempt to abort the take-off, but the captain overruled him The Fokker 100 crash may well be caused by ice. Continued to try and lift off since you were past V1, or abort since the plane was unflyable? I note that they found ice on the tail but not the wings; I’d think finding ice anywhere would call for an overall deicing, on the grounds that flight can be affected by a small amount of ice — especially if it’s not evenly distributed (as Mendel notes). There are potentially many variables: Cold air does not hold a lot of moisture, but if the air just on top of the wing became a bit warmer it could have absorbed a bit of water in vapour form. to calling them “black boxes”). Play. Z92100 is departing from Almaty (ALA), Kazakhstan and arriving at Astana (TSE), Kazakhstan. Function: _error_handler, Message: Invalid argument supplied for foreach(), File: /home/ah0ejbmyowku/public_html/application/views/user/popup_modal.php The … Bek Airin lento 2100 oli Bek Airin Kazakstanin sisäinen reittilento Almatysta Nur-Sultaniin.Lennolla 27. joulukuuta 2019 käytetty Fokker 100 syöksyi epäonnistuneen lentoonlähdön päätteeksi maahan lähellä … Notify me of new posts by email every Friday. A high-speed abort is probably one of the most difficult decisions to get right; looking at the dip in engine N1 on the FDR trace, one of the pilots seems to have wanted to abort after rotation failed (and the plane went to 18° of bank! These values would result in the wake vortices blown left off the runway center line by more than 300 meters. Online report, https://en.wikipedia.org/w/index.php?title=Bek_Air_Flight_2100&oldid=996688747, Crashed into terrain on takeoff; under investigation. France’s BEA also does this, e.g. Mendel has a few valuable comments, we will have to wait and see. Assuming the wind came from 100 degrees during that entire time and thus at an angle of 50 degrees to the runway heading and was blowing at 1 meter/second, any wake turbulence vortices by the previous departure would have been blown left off the runway center line by a minimum of 85 meters (runway width 45 meters) and would have been left off the runway therefore, assuming a wind from 140 degrees at 2 meters/second the wake vortices would have been blown left off the runway center line by 224 meters. Modern aircraft have more sophsitcated ice warfning systems, but sometimes “KISS” (Keep It Safe and Simple) is just as effective and far more reliable. (Temperature below ground tends to vary much less than air temperature, so stored fuel would \tend/ to be warmer than winter air.) The same can happen on a wider but subtler scale, depending on where the winds are blowing from. The aircraft, a 25-year-old Fokker 100, broke into pieces after crashing into a building, leading to 12 fatalities, including the captain, and 65 people with severe injuries, 22 of whom are still in critical condition. Bek Air Flight 2100 was a domestic passenger flight from Almaty to Nur-Sultan, Kazakhstan, operated by a Fokker 100 that crashed on 27 December 2019 while taking off from Almaty International Airport… With respect to the Teheran crash, the undisputable evidence we have is the location of the wreckage; it looks like the plane turned back towards the airport, and the pilots had their hands full with flying so that transmitting a mayday had to wait. It seems to me that previous commentators were on the right track. This thread is archived. Maybe the maintenance recorders would show engine irregularities. But it contains water which of course can freeze. Even in winter, the sun may have had sufficient power to raise the upper surface of the wing, maybe just by a few degrees but the temperature will have dropped again after sunset. They stated that all necessary procedures were carried out. It becomes kinda lumpy. [7][8] The airworthiness certificate of the aircraft had been renewed on 22 May 2019. On Monday Bek Air released a diagram of additional FDR parameters which can be viewed on AVHerald as a PDF with an explanation on the main page. [5][6] The local government started investigations the same day. [9][14] Kazakh authorities suspended Bek Air's flight authorization after the accident. Flight Z92100 from Alma-ata to Tselinograd is operated by Bek Air. ); I’d expect passing exhaust over a frozen wing might lead to more ice buildup until the wing heats up? According to Bek Air, the F100 had been parked at Almaty for two days and there had been no rainfall during this period. This is something that requires a lot more knowledge of physics than I learned from the meteorologist who was our lecturer when I did my ATPL, and that was many years ago I seem to recall that something like that caused water on the wings to freeze over on a B737 which plunged into the frozen Potomac during take-off. There are many aspects to consider, not all immediately apparent. I was riding my bicycle through a neighborhood and saw a flatbed trailer stacked with pieces of the wreckage. The speed dropped again and the nose dropped. 10 Jan 20 On the 27th of December 2019, Bek Air flight 2100, a domestic passenger flight with 93 passengers and 5 crew on board, crashed after departure from Kazakhstan’s Almaty … 32 years ago, I was living in metro Denver when Continental 1713 crashed, due to icing. The wake turbulence caused by a preceding A321 can have influenced the controllability, but unlikely to have been the cause of UNcontrollable behaviour in an aircraft the size of a Fokker F100. Any fuel left in the tanks would have been of the same temperature. Apparently the Kasakh Aviation Administration audited Bek Air immediately after the crash, and suspended their Air Operator’s Certificate. ), but presumably the other pilot overrode that — not a good idea. [1] The front of the aircraft broke away from the main fuselage, sustaining significant damage, and the tail broke off at the rear. Also, since wings don’t ice up symetrically, whoch causes different changes to the wings’ lift left and right, that would be the reason for the airplane to bank once it lost contact with the ground. Not much to say on this one. All engines and systems were working normally as the aircraft rotated but at 18 feet above the runway the aircraft started oscillating, rolling right and then left as it lost height and the tail struck the runway. The F100 then climbed to six feet above the runway and then sank again; the tail striking the runway a second time. The SN601 “Corvette” had a very simple system, if it can even be called that: The inboard front section of the (initially optional) tip tanks was painted matt black. An icon used to represent a menu that can be toggled by interacting with this icon. As a result, Bek Air… The condition of the airline's fleet was assessed as poor. I cannot say that [before taking off] the wings were not sprayed with antifreeze, but the fact is that there was ice. The plane took off from runway 05R and lost altitude shortly afterwards; during take-off its tail was reported to have hit the runway twice. Get the latest status of Z92100 / 2100 … If you're not a huge fan of talking to other travelers while you're high up in the air… Function: _error_handler, File: /home/ah0ejbmyowku/public_html/application/views/page/index.php Flight Z9-2100, a Fokker 100 … Denver has some impressive snowstorms with heavy, wet snow, and this was one of those occasions. 事故の概要; 日付: 2019年 12月27日: 概要: 調査中: 現場 0:00. Flight 2100 was operating from Almaty to Nur-Sultan. Function: require_once. Chip’s reply could also lead to yet another theory: Are you sure you want to cancel your membership with us? Investigators have posted an animated reconstruction of the accident on YouTube: https://www.youtube.com/watch?v=hvKRTo9xdsk&feature=emb_logo, Your email address will not be published. A news item involving Bek Air Flight 2100 was featured on Wikipedia's Main Pagein the In the newssection on 28 December 2019. The stabilizers were de-iced but the wings were not as they were clean. The Iran won’t trust the US with the data, and the Ukraine won’t trust Russia, so which countries remain that can retrieve data from recorders with heavy fire damage? Jet engines don’t have a problem with burning water. On the 27th of December 2019, Bek Air flight 2100, a domestic passenger flight with 93 passengers and 5 crew on board, crashed after departure from Kazakhstan’s Almaty International airport. Function: _error_handler, File: /home/ah0ejbmyowku/public_html/application/views/user/popup_harry_book.php Despite flying in a region with severe winters, the airline conducted no special training for winter operations. The aircraft lights initially show at the top right, above and left of the time stamp: More CCTV video showing the aircraft and the crash are available on this YouTube Channel listed as Joella Horn. How would you have decided? The problem of water in jet fuel is mainly that of the water freezing, and the ice clogging up fuel lines, filters, or pumps. The potential cost to Boeing and their clients may run in billions of $$$ and confidence in FAA oversight will have suffered severely. At the end of the runway, the aircraft again became airborne, reaching eleven feet above the ground and the captain commanded gear up. Simple and effective. Z92100 is a domestic flight operated by Bek Air. Your email address will not be published. The duration of the flight Bek Air Z9 2100 … The sight was sobering. One of the survivors, businessman Aslan Nazarliev, stated he had seen ice on the wings. [9], The captain was 58-year-old Marat Ganievich Muratbaev and the first officer was 54-year-old Mirzhan Gaynulovich Muldakulov.[10]. Line: 315 It’s easy to understand why many pilots would choose the long shot, even though it’s not a good bet. (I’ve looked at what it takes to form ice for sculpting.) [3][4] There were 98 people on board – 93 passengers and 5 crew. The aircraft was leased to Kam Air in September 2016, then returned. This article is of interest to the following WikiProjects: WikiProject … However, AV Herald have posted an argument refuting this conclusion: Editorial notes: while on the ground the wind measurement by the aircraft systems does not work with any reliability whatsoever, the aircraft was on the ground at that time, the bank angle changed while already skidding on the belly which can explain these values. [1][9], The president of Kazakhstan, Kassym-Jomart Tokayev, declared the following day, 28 December, a national day of mourning and said that "all those responsible will be severely punished in accordance with the law". This site uses Akismet to reduce spam. The Bek Air flight had departed Almaty airport in Kazakhstan, carrying 100 people - including 95 passengers and five crew. See if your flight has been delayed or cancelled and track the live position on a map. An Airbus A321 had departed from the same runway just under two minutes before. Line: 478 Line: 479 Line: 68 It’s a tragedy and perhaps could have been prevented but that remains to be seen as the investigation proceeds. One thing that is odd in this case was that the aircraft had been at the airport (not flown) for two days and there had been no rain. The prestige of this aviation administration as an independent authority has been badly dented as a result. Using the wind data off the enhanced FDR diagram while the aircraft was airborne, the aircraft measured the wind from 155 degrees at 6 knots during the first liftoff, from 161 degrees between 5 and 7 knots during the second liftoff and from 132 degrees at 6 knots during the last liftoff. in just 3 hours and 36 minutes. for Ethio­pian Airlines Flight 302: “Ethio­pian investigators delivered the mangled orange flight data recorder to specialists at France’s civil air safety investigation authority, the Bureau d’Enquêtes et d’Analyses, or BEA, which has extensive experience analyzing crashes in Europe and around the world.” (Washington Post). Another clue may be the time when the aircraft was fuelled. Also the source of the fuel could have played a role: Was it from an underground reservoir or a bowser? I was warm and cozy at home when the phone rang and a friend that worked for Continental called to tell me that there had been a crash and that he had been to the sight. By whom is another question. Does the Fokker have indicator tufts on the wings? If the fuel was warmer, loading it would have warmed up the wings and made condensation less likely. Have to read up on that again ! The companies that provide the service are in virtually all cases very careful to ensure that the quantity of water in aviation fuel will be kept to an absloute minimum. There are so many more possibilities, for instance something loosely implied by Chip: maybe during the period when the aircraft was parked other aircraft started up, and blew warm air over the F100? With passengers reporting that they slipped on the wing while evacuating the plane, ice on the wings looks like a strong contender for the cause of the accident. In response to Sylvia’s wondering how water could have accumulated on the wings without precipitation: There are plausible explanations, the most probable being the result of condensation. Because no one got hurt, the story is very funny. Check the historical on-time performance rating for flight Bek Air BEK 2100 to help avoid frequently delayed or cancelled flights [17], File: /home/ah0ejbmyowku/public_html/application/views/user/popup_modal.php The aircraft had been parked for a prolonged period and may well have been undercooled. The aircraft was operating a scheduled domestic service to Nursultan. — Bek Air crews don’t have documented winter training The F100 was configured correctly with zero flaps for departure on runway 05 right. share. Strangely enough, some years later, I had one more encounter with 1713. What would you have done in this situation? He must not have been feeling well and this contributed To…, "with a specific (moderate!) According to METARs the wind was blowing from 100 to 140 degrees magnetic between 1 and 2 meters/seconds (2-4 knots). When you consider the strength of the skin panels in a transport category aircraft, it becomes apparent how powerful the forces at work are, in a crash such as this. Australia: “The ATSB’s central office in Canberra includes an audio laboratory and an FDR laboratory. On 27 December 2019, a Fokker 100 operating as Bek Air Flight 2100, headed to Nur-Sultan, crashed shortly after takeoff from Almaty International Airport at 7:22 AM, killing twelve of the ninety-eight people on board. The airline state that the wind data retrieved from the black boxes shows wind speeds of 96 knots and that they believe that the aircraft was in the vortex of wake turbulence. Bek Air plane with 100 on board crashes just after takeoff in Kazakhstan Submitted 8 months ago Seven confirmed dead after Bek Air flight carrying 100 people crashes into building soon after take off from … The ice simply wasn’t spotted. The previous departure departed 112 seconds prior to the Fokker 100. Apparently, the wreckage had been sold and was now scrap metal and would be recycled. So yes, clear ice seems likely but how did it form? They may well insist that it is now an internal matter between the government and the military. 0:00. At the start, the aircraft lights are just visible at the top middle of the screen: This one shows the whole sequence including breaking through the perimeter fence.