Universidad Tcnica Federico Santa Mara Universidad Tcnica Federico Santa Mara BOEING 737-200. DVI Aviation investigated the in-flight failure of a composite glider. 00 left and right. 6523 AN ACT To authorize appropriations for fiscal year 2011 for military activities of the Department of Defense, for military construction, and for defense activities of the Department of Energy, to. P-3 Near Crash Last Week 45 popped rivets and the wing spar torn like paper. It is not possible to determine whether flutter was the primary root cause of the structural failure or a secondary cause after some initial structural deformation of the wing. CEAPR (Robin) DR 400/180 and DR 400/500 2001-570 R1 Main Wing Spar - Cancelled which could lead to failure of. Non-compliance with this service letter may result in undetected crack(s) in the carry-thru spar, which can result in structural failure of the carry-thru spar. I am not a good enough pilot to detect any difference in the ride. As a reaction to that disappointment the next wing I build was 1. 2: Section of a wing spar 4. 26", which was thick enough to accomodate an internal mounting configuration and required the manufacturing of only a single tool. Any details? I have not heard of an in-flight wood spar failure on a J-3 either, although most older spars have splices in them. Subsequently, a detailed inspection using the camera revealed cracks on the steel aft spar plate attachment fitting, part number (P/N) 66762-000, located on the aft wing spar. Spoilers The inboard spoiler is hinged from the aft side of the wing rear spar and the landing gear support beam. The NTSB determined that the probable cause of this accident was the pilot's decision to perform aerobatics in an airplane that was prohibited from aerobatics as stated in its operating limitations document, which resulted in the failure of the right-wing spar. Subject: Wing carrythrough spar corrosion: About a week ago, I reported severe corrosion on my wing carrythrough spar. Subsequently, a detailed inspection using the camera revealed cracks on the steel aft spar plate attachment fitting, part number (P/N) 66762-000, located on the aft wing spar. The area is the lower fuselage stub wing carry-through section, at the lower main spar wing attach area. It's established early on that his injuries and inability to fully heal himself prevent him from being as active as he wants, and while he can fight, his. Upward bending of the lower wing attachment was secondary to a primary failure elsewhere, the locations of which could not be determined due the fact that a majority of the wing structure was not recovered. You should always wear gloves when working with polyurethane glue as it is hard to remove with soap and water, and almost impossible to remove when cured. " The process is simple: You drag the wings up until. That HAS to be stronger iMO. Both people were killed in the crash. Based on the Buckingham π theorem, a set of scaling laws are determined that enable the relationship between a full-scale and sub-scale model. The rear spar hole through the KF1-3 rib web is positioned slightly different and allows contiguous web material between the spar and top capstrip. The left wing separated at 3000 AGL. The investigation found that the right wing separated from the. During the take-off, the bottom layer of the wing is subjected to tensile force and top layer is to compression. In 1994 the US FAA issued five Airworthiness Directives on the wing. of a spruce spar the total stress may be assumed to be 5,500 pounds per square inch at failure, taking a form factor of approximately. Read Comments. And putting flight pressure on wing in bend to check for play in attachments and cracks in the lower longeron from compression on arrivals. extensive wing. The weight from the electronics causes a lot of strain on launch at the CG point of the wing. Blanik Aircraft CZ is prepared to develop and certify an independent modification to the L13 wing spar and has undertaken a survey of Blanik owners to ascertain the demand for such a modification (update via Michael Derry). Skip to the end of the images gallery. Here is the story of the Fokker F. According to the calculations and the. Before the spar would fit, the top edges of the left and right cutout had to be filed for an enlargement of 1/4-inch and 18th inch respectively. The FAA issued an AD requiring a once-only inspection as an interim measure. Columbia reentered the atmosphere with a breach in the Reinforced Carbon-Carbon (RCC) left wing leading edge near Panel 8. The SIDs which look at the lower wing spar cap, if implemented into a proper maintenance program, will allow your aircraft to continue flying safely for up to 30,000 hours. That conclusion also appears to be bolstered by a snippet of data from a temperature sensor on the wing's support spar behind panel 9. , where the extruded aluminium alloy section inboard spar is riveted to the pressed sheet aluminium alloy outer spar. In 1994 the US FAA issued five Airworthiness Directives on the wing. Hence the spars must be strong enough to sustain the buckling load. Spar section is modelled in Catia V5 R21 software. The two-spar wing had a sweep at quarter-chord of 32 degrees, with a dihedral of 3 degrees and an angle of incidence of 2 degrees. See specs, photos and pricing on Motorcycles at www. Most of the wing bending is carried by the spars in the wing structure. The FAA is proposing this AD to address the unsafe condition on these products. The wing grid, however, manipulates the air flow over the wing in such a way as to make b’ and rk independent variables. The left and right lower wing spar caps were extremely corroded, and the metal was deeply exfoliated. determination that the wing extensions existing on n6586v could increase the wing bending moment (which could have caused an earlier failure of the wing spar). Spars in aircraft wing boxes are long integrally machined channel sections consisting of panels separated by vertical stiffeners, as shown in Fig. The plane landed at Hyannis where it was inspected and the spar cap failure on the left wing discovered. This failure could result in loss of control. per quarter section. The main wing spar was located around a center of pressure of an airfoil and it showed enough stiffness for twisting at nominal condition. A cantilever wing uses no external bracing. Built in the USA with refined design, quality materials, and supported by a worldwide dealer network. "(9) WING SPAR INSPECTION. The final design of the wing spar is the one with a “double-I” cross-section, 4140 Steel as the material, engine placement at 20 feet from the fuselage, total weight of 97389 lbs, and an estimated material cost of $100000 per wing spar. On August 20, 2007, a Boeing 737-800 operated by China Airlines departed from Taiwan and had an uneventful flight to Naha Airport, Okinawa, Japan. We of course have left the bottom skins off, because we still have to run some wire for the VOR antenna and the navigation lights etc. The internal wing, structure, consisting of spars, ribs and stringers, and the external wing, which is the skin. 062 to the wing spar and get it to fit in the present center spar. Investigation revealed the wing failure was due to propagation of a fatigue crack, which originated in the wing lower main spar cap. But there are others. The upper spar cap will be loaded in compression and the lower in tension for a positive load factor (wing bending upward). It separates the upper cap from the lower by about eight inches and gives an attachment surface for most of the wing ribs. Paul New replied to the topic 177 wing spar carry through SB & AD in the forum Cessna 177 Forum 1 month, 3 weeks ago The corrosion pits found in the Australia accident were normal surface corrosion due to the moisture being held against the spar by the foam pad. The area is the lower fuselage stub wing carry-through section, at the lower main spar wing attach area. The spar is an aluminium alloy -section made up of teeI. org Spar loads. The depth of the spar section is 1. in-flight wing separation resulting in a fatal accident. Working as test engineer for 787 wing test. Non-compliance with this service letter may result in undetected crack(s) in the spar caps, which could result in structural failure of the. Each wing featured: Two triple slotted flaps, plus two ailerons, on the trailing edge of the wing. The wing (for the 8) is known as the "dash one" wing. Both are of the opinion that well-maintained wooden wings are in many ways superior to the aluminum spars. The internal structural components, spars and ribs, must be incredibly strong yet light and flexible. The left wing hit the stop sign, causing damage to the leading edge, main spar, rear spar, flap and ailerons, and wingtip. The pickle fork, named so because of its resemblance to the kitchen utensil, is a component that helps attach a plane’s fuselage to its wing structure, helping to manage the stress, torque and aerodynamic forces that bend the connection between the wings and the body of the jet. Related Service Information Under 1 CFR Part 51. The 88 went completely through the wing severing one of the main spars and exploded above the plane. Press the wing lock mechanism while pulling the wing away from the center section. : Hi folks!This instruction is a story about how I made an ornithopter prototype. Spars-Front and Rear spar. It is important to design the wing spars which carry the bending loads, to be fatigue resistant so that damage or expensive inspections could be avoided. Landing Gear:. The accident we were investigating involved the inflight failure of the wing resulting in the loss of the airplane. If the thickness of the spar is increased, the efficiency of the aircraft decreases. Ask for this Gold Wing® Audio Comfort Navi ABS by stock number 701202 or make and model. 5" ailerons. The internal wing, structure, consisting of spars, ribs and stringers, and the external wing, which is the skin. Stress analysis of the wing fuselage lug attachment bracket is carried out and maximum tensile stress is identified at one of the rivet hole of I-spar plate. The Spar is a structure the wing structure that supports an aircraft on ground and allows it to taxi, take-off, and land. ) Loose flathead rivets will creak at this joint. The weight from the electronics causes a lot of strain on launch at the CG point of the wing. Boeing’s deadly crashes and the failure of American oversight Michael A. 2nd flight with skywalker after installing the ET Vector. Today, fifty two years later, you have not one record on an Aeronca built 7 or 11 series accident due to wing spar failure. 50 per wing spar, according to FAA officials. The tops of the two slots are a 4 and 9/16ths from the Side Rail. that the wing failure was caused by a fatigue fracture in the lower spar at Right WS 81. It develops shearing stresses which react to the applied torsional moments and shear forces. A primary focus of this report will be to. The very first launch saw the left panel fold about 10" out from the wing root. There was no evidence of any preexisting damage on the wing spar attachment fittings. The active torsion is achieved by a servomo-tor at the end of the outer wing which twists the wing against the spar via the outmost rib of the wing. The only part there is the plywood wing walk which only extends out two stations. In my last article I discussed the basics regarding what to look for when inspecting wood. The final design of the wing spar is the one with a “double-I” cross-section, 4140 Steel as the material, engine placement at 20 feet from the fuselage, total weight of 97389 lbs, and an estimated material cost of $100000 per wing spar. Failure to address each item may result in exclusion from the competitive process and any response that is not in the requested format may be rejected must be provided on your headed paper or quotation format with your original signature quotation must be made out to ronocs ltd t/a the wing bar and detail your equipment proposal you must clearly provide o business name, address, telephone and. So, on Tues. txt) or view presentation slides online. By now, every Cherokee owner, from the earliest PA-28-180 to the most recent Arrow, has heard about the inflight wing separation that occurred April 4, 2018, to a Piper Arrow owned by Embry-Riddle Aeronautical University in Daytona Beach, Florida. According to the calculations and the. • Failure load case analysis: strength analysis of wing panels and joints Relocated at Boeing facilities in Seattle, USA, from June 2007 – July 2007 and from January 2008 – April 2008. Goodwinds Composites offered to sponsor the SR-I Project with pultruded carbon for both the scale spar and real spar. North Wing manufactures high quality, weight shift control Light Sport Aircraft, Ultralight Trikes, Trike Wings, and Hang Gliders that are fun to fly. Eddy current technology has been found to be particularly useful for measuring the protective coating thickness over the reinforced carbon-carbon and for the identification of near surface cracking and voids in the RCC matrix. But a change to the Utility category. Failure Analysis of Devices [also termed 'Reliability Physics'] Now, let us switch gears to solid state device failure analysis methods. In numerical analysis of the differential spar crack grew from horizontal cap wall to vertical wall; this path was somehow different from that observed in experiment. Boeing 787 Passes Incredible Wing Flex Test. This research work investigates graphite-epoxy design for light weight high performance structure of an aircraft wing spar using computational techniques. structural failure in aircraft By John Thorpe, GASCo's Chief Executive reproduced from GASCO. Strength of high-wing versus low-wing single piston aircraft I have been told that the strength of low-wing, "strutless" aircraft is signigicantly higher than that of high-winged "strutted" aircraft, most obvious example being the Cessna 152 / 172 trainers that many of us fly. The assembly is very flimsy at this point and I would recommend getting a helping hand for this. On one occasion the Germans tried dropping bombs from a captured B-17 onto a formation attacking the Rhineland. Life on a solid wood wing spar. ) Loose flathead rivets will creak at this joint. The inside of the spars are the sides with the lettering. Failure to pay attention to this detail can easily ruin the wing. I do these every annual. The main wing is constructed using an aluminum circular spar that passes through 18 aluminum ribs. In the latter stages of the flight, the fire and smoke on the port side of the aircraft became visible from the cabin, but by this time the softening of the wing spar would have progressed to the point where a catastrophic failure was imminent. American B763 at Chicago on Oct 28th 2016, rejected takeoff, fire at right hand wing due to uncontained engine failure Tags: American, Incident, Boeing 737-800, B738, N821NN. Think of the thousands and thousands of hours flown by these airplanes. THE VIDEO YOU JUST SAW WAS FAKE. Some of the forces acting on a wing spar are: Upward bending loads resulting from the wing lift force that supports the fuselage in flight. The wing was changing incidence slightly which accounted for the aileron input required for level flight. See specs, photos and pricing on Motorcycles at www. Non-compliance with this service letter may result in undetected crack(s) in the carry-thru spar, which can result in structural failure of the carry-thru spar. We did our pressure test (leak test) on both tanks and they checked out ok. It’s another example of metal fatigue still being an insidious airworthiness threat, even (especially?) for aircraft types with a long service history. " Quote from NTSB preliminary report. This last specimen was tested up to ultimate load, followed by cyclic. A crack in the carry-thru spar can develop to a point that the carry-thru spar can have structural failure that can result in the subsequent loss of the airplane and/or wing separation. the wing spar cap (P/N 95-110022-4). More than a few of these accidents involved aerobatics, maneuvers that the aircraft was neither designed nor approved for. During last year’s failure only the central part of the spar broke and, after thorough testing, the two outer sections of the spar were spared. Antonyms for Wing structure. Design wing failure in 2009 as the guideline, I arranged for an Aeronautical Engineer to do an assessment of the wing spars of my kit. The idea to this collection of articles was born when Al made a detailed description of the replacement of a bottom skin on the Ercoupers tech list. The investigation disclosed that a fatigue crack in the lower spar cap cause of this accident was the in-flight failure of the left wing which resulted from a preexisting fatigue crack in the left-wing lower spar cap. The global modulus and stiffness of this multifunctional wing spar are estimated using both the rule of mixtures and the cross section transformation method. Thankfully, careful inspections normally detect cracks before they cause a failure. CNC Wing Ribs: At our monthly meeting of the Experimental Aircraft Association, I was telling the members that I had access to a CNC router. Bixler 2 spars. They said that this fatigue damage reduced the residual strength capability of the right wing structure, leading to the failure. The left wing hit the stop sign, causing damage to the leading edge, main spar, rear spar, flap and ailerons, and wingtip. Car Wing Mirror. All information comes from the NTSB reports. Larger aircraft, either military or commercial, require fuel cells in the wing structure. per quarter section. In numerical analysis of the differential spar crack grew from horizontal cap wall to vertical wall; this path was somehow different from that observed in experiment. The spar caps also form a boundary onto which wing skin is attached and support the wing skin against buckling. The wing on this model however is 60 inches! I had a very hard time laying the bead of glue all the way down the spar, then back on the other spar, and then holding the wing in position before it. This AD requires repetitive inspections for cracks on the front spar lower chord, inspar skin, and wing skin, and corrective action if. The Varsity wing spar is located on the 30 per cent chord line, There are also two false spars, at forward and aft positions, but these are relatively weak and transmit only shear loads at the wing root. Mat static loaded his cantilevered 'Raptor' wing to a negative 5g without failure. These are not the accident airplane and these are not from ERAU. Forums: Hangar Talk - Wing comes off a PA28 during a checkride with an examiner (and wing spar structure discussion). embedded optical fiber. Discussion in 'General Experimental Aviation Questions' started by Stoyan, So, yeah, we can not be sure of anything on this failure. The guards decided to close off the ventilation system, trapping prisoners and smoke in together, while the guards watched from a safe spot and took down a list of 120 names of those they saw as being involved in the riot. The global modulus and stiffness of this multifunctional wing spar are estimated using both the rule of mixtures and the cross section transformation method. The ribs are riveted to the spars and the skin then is riveted to the ribs using stainless cherry flush rivets. • Failure load case analysis: strength analysis of wing panels and joints Relocated at Boeing facilities in Seattle, USA, from June 2007 – July 2007 and from January 2008 – April 2008. The owner of a lodge 60 km from Kenora, and an employee, died after a plane crash on March 30, 2019. I have designed a laser cut wing spar drill template/jig which positions the five spar components so that all of the holes can be drilled in a complete spar as an assembly. In Glory to the Losers manga, this was retconned to a dozen energy cartridges, but Heero can't seem to find a way to replace them. Flight loads are minimal at this joint. There may be more than one spar in a wing. The stop sign sliced into the leading edge until it hit the main spar, permanently bending the wing spar rearward. This graph is typical of a laminated spar failure a series of incremental failures as each lamination fails, rather than a single catastrophic explosion typical of a solid sample. 5 mm is required; and the holes are later reamed 2mm oversize. The only part there is the plywood wing walk which only extends out two stations. 5% of limit load. You make the call. November 1, 2010. When stripping back the wing fabric the spar is very easy to inspect for damage. Keywords: fatigue crack growth, wing spar, fatigue test, BEM, SHM Abstract: Simulation of fatigue crack growth in the bottom flange of twin turboprop commuter aircraft wing spar is described in this paper. wing failure ‘Aircraft fl ying in the UK will have the Never Exceed Speed and Manoeuvring speeds reduced’ Ruptured wing spar end fi tting from the EV-97 with failed port wing. A crack in the carry-thru spar can develop to a point that the carry-thru spar can have structural failure that can result in subsequent loss of airplane control and/or wing separation. Wing Zero doesn't share this limitation, however. Here, the importance of impact damage was identified. I picked up a used 40% Krill Katana a while back from a guy who's flown it exclusively for IMAC. A proprotor system operable for use on a tiltrotor aircraft having a helicopter flight mode and an airplane flight mode. The accident we were investigating involved the inflight failure of the wing resulting in the loss of the airplane. I agree - wood has no fatigue problems. See the complete profile on LinkedIn and discover Prathikshen’s connections and jobs at similar companies. This proved to be true, on the second sample, bending the spar forward and slightly up, the break was nearly identical. Figure 8 – Test 2 Rig Post Failure. The wing spar joint comprises a forward fitting, an aft fitting, a spar cap a lower chord fitting and a strap member. M odel Description and load calculation. Onboard was a large battery and an APM 2. a short spar, normally kept stowed, which may be used to push the clew of a jib away from the boat when the boat is running downwind. The spar strap kit Cessna produced for the 402C was based on their analysis, which suggests it may be not fixing the real problem exactly. The ribs are riveted to the spars and the skin then is riveted to the ribs using stainless cherry flush rivets. Restoration is headed by Col. wing front carry-through lower spar, horizontal and vertical stabilizer attachment points, right wing rear spar lower cap wing station (WS) 66, and right wing rear spar lower bathtub fitting. They show the results of inspections of a number of PA-28 aircraft that were undertaken after the ERAU Arrow accident. The spar bolts should have the end tapered to aid in aligning the holes in the spars. However, where a single spar carries the majority of forces on it, is known as main spar. Small metal strips (stiffeners, stringers, longerons) attached to prevent buckling. Cessna has authorized scraping away the corrosion on the worst places, but my mechanic feels that there are too many of them, and that only changing the spar will really fix the problem in the long run. Defect was found using an inspection mirror and strong light through an inspection hole. Reports have been received of cracks found in the wing spar caps. Car Wing Mirror. I am not a good enough pilot to detect any difference in the ride. 21/8/53 Received 1AD ex 1Sqn via 82 Wing for front spar repairs. in-flight wing separation resulting in a fatal accident. This is a quick temporary fix. Worf Had the Flu: Subverted. NOTE 1: This AD applies to each airplane identified in the preceding applicability provision, regardless of. The piezoceramic wafers act as sensors, actuators, and harvesters. This initial action is what requires the 12 hrs. A small fatigue crack was also identified in the accident airplane's right-wing main spar lower cap; however, that crack had not progressed to the point of failure. Kolb Aircraft Project Spar and Boom Tubes The wing's strength comes from the spar tube running through the length of the wing. Failure to address each item may result in exclusion from the competitive process and any response that is not in the requested format may be rejected must be provided on your headed paper or quotation format with your original signature quotation must be made out to ronocs ltd t/a the wing bar and detail your equipment proposal you must clearly provide o business name, address, telephone and. 032" thick, which is about the same as ten sheets of printer paper. Synopses of Air Force Aging Aircraft Structural Histories This appendix provides a brief synopsis of the structural history for each of the Air Force's aging aircraft listed in Table 3-1. Catastrophic Failure refers to the sudden and complete destruction of an object or structure, from massive bridges and cranes, all the way down to small objects being destructively tested or breaking. During the take-off, the bottom layer of the wing is subjected to tensile force and top layer is to compression. It’s another example of metal fatigue still being an insidious airworthiness threat, even (especially?) for aircraft types with a long service history. Boeing 787 Passes Incredible Wing Flex Test. Failure Modes Results Competing in the SAE-Advance Class R/C plane competition in the spring. The differential airdrag load is applied between the range 62 to 620 Kg which varies non-linearly. stubbscycles. I believe these are not available new from Cessna, so should one need to replace one that has become unserviceable, a replacement part would have to come from a salvage yard. This discovered crack was on an airframe with similar hours, cycles, and a similar life of use (Trainer) as the ERAU crash plane. DVI Aviation investigated the in-flight failure of a composite glider. Democrats spar over health care at key Iowa event. November 1, 2010. Synopses of Air Force Aging Aircraft Structural Histories This appendix provides a brief synopsis of the structural history for each of the Air Force's aging aircraft listed in Table 3-1. It appeared to have been the main spar that failed first, twisting into the plane of the wing and then failing in bending. With our wing now with one skin on the upper surface the next step is to sand the second spar cap groove in the lower surface of the wing using your home-made sanding block and then cutting a slot for the shear web. Most of the wing bending is carried by the spars in the wing structure. Please note that this list is raw, uninterpreted data only. approach to NAS Whidbey Island with the #1 engine in a simulated failure mode. In the wing plate area, as the heat transfer can be simplified as a two-dimension problem during the quenching process, the distribution of residual stresses is similar to that in a thick plate [1], which is approximately symmetrical along the thickness direction, x-and y-component stresses are very close at the same point. fm/adchoices Thu, 04 Apr 2019 04:23:24 -0000 full TYT Network The right-wing is full of crazy people. Subject: Wing carrythrough spar corrosion: About a week ago, I reported severe corrosion on my wing carrythrough spar. This RV-3 is remarkably fast, and has very impressive cross country capabilities. The crack they located on this PA-28R-201 measured 0. Custom Kit Finder Kit ID. Examination of the left-wing main spar of another Piper PA-28R-201 owned and operated by the same operator as the accident airplane; manufactured in the same year with a serial. (a) Background On March 30, 1987, a PA-28 engaged in pipeline patrol operations suffered an inflight wing separation resulting in a fatal accident. 2nd flight with skywalker after installing the ET Vector. This proposed AD would require a one-time leak test of the strut upper spar areas for the left and right wing struts, and corrective action if necessary. The outer panel of the right wing failed in flight and rotated upward. The minor axis bending capability is reduced by 8%. Which means that there has to be some sort of cross bracing in the open boxed areas of the wing. Airworthy Comanche Forum - Main wing rear attach point - Noticed this week while removing interior from my PA-24/250 for another project, that all ten or so rivets holding the rear attach point plates for my pilots side main wing are sheared. This service letter provides instructions to accomplish a visual inspection of the lower main spar caps in the right and in the left wings. We stock the UK's best selection of wing mirror glass', wing mirror covers, wing mirror indicators & wing mirror unit assemblies. Synonyms for Wing structure in Free Thesaurus. IJRET: International Journal of Research in Engineering and Technology. I aquired 2, 1/8 inch diameter rods, 3 ft. Stress analysis of the wing fuselage lug attachment bracket is carried out and maximum tensile stress is identified at one of the rivet hole of I-spar plate. failure), followed by a static test to limit load of the real wing later. Repeat for the opposite wing. Trump admits failure. "The left wing was bent upward (in the positive direction) at the wing root approximately 90 degrees, with the remainder wrapped around the top of the airplaneDetailed examination of the left wing revealed that the lower main wing spar cap was fractured at the wing root. The ribs are riveted to the spars and the skin then is riveted to the ribs using stainless cherry flush rivets. 22Glue the plywood spar joiner (W-8) into position as shown. DATES: This amendment becomes effective on January 19, 2001. Spars - Beams that extend from wing root to tip. At this location a wing attach fitting is bolted into the carry-through structure with multiple attach bolts. The FAA recently issued a pair of Airworthiness Concern Sheets, one directed at an issue found with float-equipped Cessna 180 and 185 models, and the other. A typical m id-sized airplane wing consists of front and rear spar s, and. The wood is from the spar of a 1946 Aeronca Champ aircraft. The corrosion damage began just outboard of the spar splice and continued outboard to the end of the spars. Piper is proposing a new SB to install the access panel and perform an initial visual inspection on the main spar for. Pictured here is a a forged billet that will undergo additional milling to turn it into a wing spar, a critical structural components within the aircraft’s wing. Only an airplane with a main wing spar that has a factored service life of 5,000 hours, has had either main wing spar replaced with a serviceable main wing spar (more than zero hours TIS), or has airplane maintenance records that are missing or incomplete, must have the eddy current inspection. The coupled-spar wing will not only resist torque loads imposed on the wing but will actively compensate for wing twisting moments arising from lift-engine twisting about its support structure. Page 3-Discussion 39% Krill Katana spar failure General Discussion. Engine #2 had ejected a number of engine components. As the planes aged, one or two spar failures did occur. STEVE ELLS delves into the history of Cherokee wing spar cracks and investigates inspection methods. the force is transferred to the bracket by metallic tubes which are connected trough bracket. The wing had corrosion that caused a point stress concentrator resulting in catastrophic failure of the wing. New Service Bulletin SEL-57-06 and SEL-57-07 for 210 and 177 Carry Through Spar Textron published SEL-57-06 and SEL-57-07 on June 26, 2019, to address the possible failure of the carry through spar that's mounted in the overhead area of the cabin on cantilever wing Cessna 210 and 177 series aircraft. Failure to address each item may result in exclusion from the competitive process and any response that is not in the requested format may be rejected must be provided on your headed paper or quotation format with your original signature quotation must be made out to ronocs ltd t/a the wing bar and detail your equipment proposal you must clearly provide o business name, address, telephone and. (Under the direction of Dr. The very first launch saw the left panel fold about 10" out from the wing root. We of course have left the bottom skins off, because we still have to run some wire for the VOR antenna and the navigation lights etc. winch: mechanical device for hauling in a line. Subsequently, a detailed inspection using the camera revealed cracks on the steel aft spar plate attachment fitting, part number (P/N) 66762-000, located on the aft wing spar. The investigation determined that the right wing separated because of preexisting fatigue fractures and cracks in a stringer, the lower skin and rear lower spar cap. bias glass as a wing skin. This failure could result in loss of control. extensive wing. Sometimes the wings of older aircraft developed cracked spars. The 737-800 employs a high-lift system that includes leading-edge slats which enhance takeoff and landing performance. Secondary failures at stiffener terminations were also identified. The plane landed at Hyannis where it was inspected and the spar cap failure on the left wing discovered. The affected area started at wing station 70 and continued outboard approximately 8 inches. which might be survivable with shoulder harnesses, just my humble opinion. The main wing is constructed using an aluminum circular spar that passes through 18 aluminum ribs. Grind a 45 in the ends of the bolt as shown in the picture. Basically, they take the airplane and bend its wings to an absolutely insane level. Sonicmodell F1 Wing 833mm Wingspan Super High Speed FPV EPP Racing Wing RC Airplane KIT/PNP The Super High Speed F1 Wing is designed for extraordinary high speed FPV experience. The first problem I had was gluing my wing when I folded it (this uses a similar wing construction to the flitetest Sparrow I believe it is called. The inner surfaces of the carry through spar remain heavily coated with LPS-3 from when they were treated during the last wing removal (1975) All recommendations of the International Cessna 170 Association for inspection of this area have been carried out during numerous inspections with no discrepancies. Building the Wing: 18Cover the right wing plan with wax paper to prevent the parts from sticking to the plan. A 2015 FAA bulletin, however, warned that the plane's model has the "potential for corrosion on the wing rear spar at the fuselage attach fitting. The failure of the second (and final) Aerodrome flight is shown in Figure 1. The -8 wing underwent a minor redesign after the accident - whilst the original complied with requirements, IIRC the meeting of the spar thinning out, aileron/flap junction, tank/LE skin junction and the failure point might not be ideal, and some of these elements were moved apart (?). The circular spar serves as the pitch axis of the entire structure, and is located at the quarter-chord location from the leading edge. The images show evidence of cracks, corrosion, elongated bolt holes and washers wearing into the spar. This problem focuses on a critical area on a wing front spar, shown in Figure UD-1. spar bar stock with 1/8 inch rivets) or CN-2-II Spar Modification Instructions for Type II wings (3/16 inch thick spar bar stock with 3/16 inch rivets) should not be prohibited by design from aerobatics, unless the airplane's aerobatic gross weight (including pilot and wing fuel weight) exceeds 1,050 pounds. Because the main spar tested can support 880 lbs. Together, these two structural components collectively provide the wing rigidity needed to enable the aircraft to fly safely. 16/12/54 Held serviceable 1 Sqn. The profile of the ZODIAC wing is 15% thick (Riblett GA 35-A-415 airfoil). The FAA is proposing this AD to address the unsafe condition on these products. This AD requires repetitive inspections for cracks on the front spar lower chord, inspar skin, and wing skin, and corrective action if. 5 Hz), produced high tensile stress in caps; consequently, visible crack appeared on the left cap below the support after only 8542 cycles. 22Glue the plywood spar joiner (W-8) into position as shown. Cessna has authorized scraping away the corrosion on the worst places, but my mechanic feels that there are too many of them, and that only changing the spar will really fix the problem in the long run. Only an airplane with a main wing spar that has a factored service life of 5,000 hours, has had either main wing spar replaced with a serviceable main wing spar (more than zero hours TIS), or has airplane maintenance records that are missing or incomplete, must have the eddy current inspection. Revises AD 94-18-04, Amendment 39-9017. The axial compression capability is reduced by 27%.