< Back Engineering updates in March 5 Apr 2024 The following documents have been updated in the Engineering 'Info Library' during March. Continuing airworthiness information: Mandatory Technical Directive MTD-02-2024 Pioneer trim tab checks TADS : Europa Sling 2 Technical Leaflets : TL 1.28 Approved homebuild aircraft type list (new) TL 3.12 Engines and propellers fitted to LAA aircraft TL 3.17 List of prototype modifications Propeller type list PTL/1: Ikarus C42 FB UK Standard Modifications: SM 10671 Rotax 2-stroke carburettor heater Next Previous

Detail Design Having worked out a promising-looking layout, initial three-view and performance and weight specifications, now is the stage where the hard work begins of transforming concepts to working drawings. Essential decisions have to be made about types of material to be used, the structural arrangement, exact choice of powerplant and so on. You’ll probably need to make a cockpit mock-up to check the ergonomics and control system arrangements, and maybe build a flying radio controlled model of the design to give faith in the handling characteristics. With the basic geometry laid out, stress calculations and assembly drawings come next, then drawings of individual piece parts. Keep an up-to-date tally on weights. As the drawings get more detailed you must re-evaluate whether you are going to meet your original targets in terms of weight, strength and aerodynamic cleanliness, whether you need to re-visit your original assumptions or re-design from scratch. Is there a way that the part or assembly can be made more easily, more cheaply, lighter, stronger, more fatigue or corrosion resistant? Fewer parts and fewer joints generally means fewer problems and less weight. Can you use off the shelf parts rather than having to make them specially? Are there other aeroplanes around that have already solved a particular problem in a clever way? Will the aircraft be easy to inspect in service, easy to repair if it gets damaged? Can it be broken down for transportation? If the handling isn’t quite right when the prototype is test flown, does the design make provision for ‘tweaks’ to put it right? Does the design include reserves of strength to cope with weight growth in service and more powerful engines, or is everything pared down to the minimum? Design Tutorials

< Back Alert A-12-2025 - Aeroprakt windscreens 14 Oct 2025 LAA Engineering has issued Alert A-12-2025 to highlight the recent issue of a series of Aeroprakt service bulletins that require older style windscreens to be replaced at certain intervals, with the Vne of the aircraft being temporarily reduced in certain circumstances. A-12-2025 - Aeroprakt windscreens issue 1 .pdf Download PDF • 231KB Next Previous

< Back MTD-06-2025 published - Europa Tailplane Torque Tube Mod Failure 16 Dec 2025 Ref: LAA Mandatory Technical Directive MTD-06-2025 – Europa Tailplane Torque Tube Clamp Mod A recent inspection of a Europa fitted with the tailplane torque tube clamp modification, LAA MOD 10623, revealed both halves of the clamp had broken and fallen apart. These clamps are intended to prevent relative movement between the tailplane torque tube, the tailplane drive plates and the central drive horn, on which the mass balance arm is mounted. Failure of these clamps could allow free play to develop, potentially leading to taper pin hole damage, tailplane flutter, or jamming of the pitch control mechanism. An inspection must be carried out within the next 5 flying hours to determine whether MOD 10623 is fitted. If MOD 10623 clamps are fitted, making use of a light source and mirror as necessary, inspect the alloy clamp blocks for any signs of cracking (in particular along the sharp corner between the bolt flanges and main body), for any signs of looseness or relative movement between the parts and for any other abnormalities. If any of these are detected, the aircraft must not be flown and LAA Engineering must be contacted. This must be repeated at intervals not exceeding 25 flight-hours or the next Permit revalidation inspection, whichever occurs first, for as long as MOD 10623 remains fitted. Please refer to the below Mandatory Technical Directive for full details, compliance times, and certification requirements. This MTD can be found HERE and is also available below. MTD-06-2025 - Europa Tailplane Torque Tube Mod Failure .pdf Download PDF • 259KB Next Previous

< Back Engineering updates in October and November 6 Dec 2024 The following documents have been issued/updated in the Engineering 'Info Library' during October and November. Alerts : Alert A-01-2024 Eurostar trim system Alert A-02-2024 Lycoming connecting rod bushings TADS : Europa Eurostar Sling 2 Next Previous

< Back Engineering updates in February and March 11 Apr 2025 The following documents have been issued/updated in the Engineering 'Info Library' during February and March. Technical leaflets : TL 1.10 - List of aircraft parts and materials suppliers TL 2.01 - A guide to LAA aircraft ownership TL 2.22 - Non-type specfic MPDs TL 3.25 - Flight test briefing Continuing airworthiness information : Alert A-01-2025 - Piper rudder post Alert A-02-2025 - Rotax crankcase Alert A-03-2025 - Gen 4 Jabiru 2200 and 3300 engines TADS : Brandli Cherry Cessna 120 Eurostar Groppo Trail Rans S5 (204 and 204B) Rotax 4-stroke Sportcruiser Next Previous

< Back LAA AGM 2025 Full article on the AGM and elected directors will be in the November issue of Light Aviation due out next week. Elected Directors : Alan Crutcher, Alistair Seymour, Clive Shipley, Paul Kirkham, David Millin, Peter Pengilly Next Previous

For part-built LAA projects, the new owner/builder needs to continue following the LAA amateur-build process. For already-flying LAA aircraft, the new owner simply takes on the responsibilities of the old owner for looking after the airworthiness of the aircraft. The restoration of an aircraft might range from dusting off the cobwebs and giving the engine a good service, to a full strip down to component parts and fabricating missing or damaged parts. It is also possible, in some circumstances, to import a part-built or completed aircraft from overseas. This is generally only possible where the type is already accepted by the LAA, the aircraft can be shown to have been amateur-built under a similar regime to that in the UK, and which is readily inspectable to confirm the build standard. A number of LAA types come under the heading ‘orphaned vintage types’. These are types that are no longer supported by their manufacturer and have been deemed ‘orphaned’ by the CAA (e.g. Austers). There are also some types that can elect to operate either on a Certificate of Airworthiness or on an LAA-administered Permit to Fly (e.g. Chipmunks). Buying an Aircraft Not everyone has the inclination, ability or time available to build an aircraft. The only route then is to buy a part-built aircraft for completion, a ready-flying aircraft or an aircraft in need of restoration. When buying an aircraft, the overriding message is ‘Buyer Beware!’ If you’re buying an aircraft that is already flying within the LAA system, you mainly need to satisfy yourself that it’s in an acceptable condition and meets your needs. LAA Inspectors are often happy to look over an aircraft for you to help you make a technical assessment of its condition. Another area you should consider is whether it has enough payload to take you where you want to go. When buying a partially-built aircraft or one from overseas, you need to make sure that the aircraft is eligible to hold a UK Permit to Fly and is in a configuration that the LAA can accept. It is usually a good idea to drop LAA Engineering an email to check before you part with large amounts of money. For further information, click the button below or look in the 'Classifieds' section of the LAA Magazine Click here for more information

< Back LAA 'Grass Roots Fly-In' returns 23 Apr 2023 The LAA is returning to the green grass of Popham Aerodrome in Hampshire for a repeat of its “Grass Roots Fly In” from 18th to 20th August 2023. The Fly-In will again on one hand take the Associate back to its traditional roots, while continuing to offer the first chance to see some of the latest aircraft and products in the recreational aviation market. What was particularly notable about the 2022 Popham event was its sociality. LAA members and exhibitors alike commented on its relaxed and friendly atmosphere, with post-event comments such as “It’s a great reunion as well as a fly-in–cum trade show” and “super friendly, the event always had a good vibe”. A joint venture with Popham Aerodrome, the LAA Grass Roots Fly In will develop its strengths as a social event bringing flyers from around the UK and Europe to meet fellow enthusiasts. The grass runways at Popham and the airfield’s famed rural ambience will mean that the event will focus on the fly-in and social element as much as on a large exhibition campus. The earlier mid-August date will also mean longer evenings, allowing more scope for flyers from further afield and hopefully, milder conditions for those who choose to ‘camp under the wing’. Said LAA CEO designate Simon Tilling: “The LAA Grass Roots Fly In was a great success last year, with over 3,000 visitors, more than 30 exhibitors and a total of 350 visiting aircraft through the weekend. It is a different event to the past, larger scale LAA Rallies and we’re working on plans for the continuation of a larger scale LAA event in the future. For this year, we’re looking forward to another great, social and fun, LAA fly in”. Next Previous

Light Aviation Magazine 2020 Click on the links below to open each issue of Light Aviation Magazine from 2020 January 2020 April 2020 July 2020 October 2020 February 2020 May 2020 August 2020 November 2020 March 2020 June 2020 September 2020 December 2020

< Back GAA Position on Electronic Conspicuity 29 Jan 2024 General Aviation Alliance Unveils Updated Electronic Conspicuity Position Paper - GAA recognises the importance of EC in collision avoidance GAA Position on Electronic Conspicuity .pdf Download PDF • 364KB The General Aviation Alliance (GAA, www.gaalliance.org.uk ) is pleased to announce the release of its updated Electronic Conspicuity Position Paper, a comprehensive document outlining the organisation's stance on the integration and advancement of electronic conspicuity technologies for all UK aviation. In response to the rapidly evolving landscape of aviation technology and the increasing need for enhanced safety measures, the GAA has undertaken a thorough review and revision of its Electronic Conspicuity policy. This updated position paper reflects the Alliance's commitment to fostering innovation, ensuring airspace safety, and promoting a collaborative approach for all UK aviation. Key highlights of the updated Electronic Conspicuity Position Paper include: 1. Technology Integration : The GAA supports the widespread adoption and integration of electronic conspicuity technologies across all general aviation aircraft. The GAA recognises the potential of these advancements to significantly reduce the risk of mid-air collisions. 2. Standardisation and Interoperability : The GAA advocates for the establishment of industry-wide standards and protocols to ensure the seamless interoperability of electronic conspicuity systems. Standardisation will facilitate the integration of various technologies and contribute to a more cohesive and efficient airspace environment. 3. Government and Regulatory Engagement : The GAA encourages active engagement with regulatory bodies to promote the development of clear and practical regulations that support the safe and effective deployment of electronic conspicuity technologies. The GAA is already working collaboratively with government agencies to address regulatory challenges. 4. Research and Development Investment : To drive further innovation, the GAA encourages increased investment in research and development for electronic conspicuity technologies. The GAA believes that sustained efforts in this area will result in the development of more advanced and cost-effective solutions for all UK aviation. The General Aviation Alliance invites stakeholders, industry partners, and the general public to review the updated Electronic Conspicuity Position Paper, which is available on the alliance's website https://gaalliance.org.uk/position-and-data-papers . About the General Aviation Alliance The GA Alliance is a group of organisations representing the interests of many in the UK GA industry. The members of the GAA are: British Balloon and Airship Club (BBAC) British Gliding Association (BGA) British Hang Gliding and Paragliding Association (BHPA) British Microlight Aircraft Association (BMAA) British Skydiving Helicopter Club of Great Britain (HCGB) Light Aircraft Association (LAA) PPL/IR Europe - European Association of Instrument Rated Private Pilots Royal Aero Club of the United Kingdom (RAeC) Airfield Operators Group (AOG) The GAA coordinates about 72,000 subscription paying members of these bodies. Next Previous

< Back MTD-04-2025 published Rans Control Linkage Rod End Connector Washers 13 Nov 2025 MTD-04-2025 - Replacement of all plastic control linkage rod end connector washers with metal washers During an inspection of an early Rans S6, all plastic washers between the bolt and bearing of the flap and aileron control linkage rod end connectors were found to be split or missing. This issue is identified in Rans’ service bulletin 012390-03. As plastic washers are susceptible to failure due to wear and embrittlement, this MTD is raised to mandate the replacement of all plastic control linkage rod end connector washers with metal washers. These washers prevent the rod end from disconnecting in the event of bearing failure. The washers fitted must be larger than the diameter of the bearing. Refer to here for a diagram. MTD-04-2025 can be found here and is found below. Note: Do not re-use nyloc or other self-locking nuts if their locking ability has become compromised. MTD-04-2025 - Rans Rod End Washers .pdf Download PDF • 240KB Service Bulletin - Control Linkage Rod End Connectors .pdf Download PDF • 66KB Next Previous