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< Back New LAA Inspector - Tomas del Carpio 15 Aug 2025 We are pleased to welcome Tomas del Carpio as a new LAA Inspector, having attended an LAA Inspector Assessment Day at Turweston recently. Living in the historic village of the former RAF Upper Heyford base, aviation is a part of Tomas’ life even outside of my daily job of restoring and maintaining vintage and modern light aircraft. He has been in the aircraft maintenance industry since 2008 but the age range of aircraft. He has worked on spans more than a century of aviation history. From helping to restore an original AVRO 504 to carrying out advanced composite carbon fibre repairs on a Diamond DA42, his experience covers a broad and diverse spectrum of aircraft types and technologies - both certified and non-certified. Whether it’s performing an engine change on a King Air in the dusty heat of Malta or changing a tyre on a stranded PA-28 in a muddy field in Kent, He has encountered a wide variety of challenges and learned something valuable from each one. Tomas is always happy to help and share his knowledge and experience whether it’s offering technical advice over the phone or getting hands-on with something more involved. Next Previous

< Back LAA Alert for some models of Rotax Engines 1 Mar 2025 LAA Alert A-02-2025 has been published on the LAA website (and is also attached), highlighting a recent service bulletin published by Rotax regarding the inspection and/or replacement of the crankcase and/or gearbox housing on affected engines. Rotax has identified a potential manufacturing issue affecting the hardness values of the crankcase and/or gearbox housing materials in certain engines. These components may not meet the required specifications for material hardness, which could lead to reduced component durability and/or potential oil leakage. Rotax regards this bulletin as mandatory. A-02-2025 - Rotax Crankcase .pdf Download PDF • 220KB Next Previous

Opening Times & Car Parking Opening Times Visitors will be asked to leave the exhibition area by 5.00 p.m. Friday: 9.30 a.m. to 5.00 p.m. Saturday: 9.30 a.m. to 5.00 p.m. Sunday: 9.30 a.m. to 4.00 p.m. Car Park Car parking remains free. Follow sign posts to visitors car park. Please do not use the Exhibitor car park. Disabled parking is available. Please note that entrance to the LAA Rally car park and exhibition site is separate from the Leicestershire Aero Club entrance (reserved for LAC members and other airfield users) How to get there Leicester Airfield , Gartree Road, Leicester, LE2 2FG Follow the Rally Car Park Signs What3words Location: rings.using.nails

Light Aviation Magazine 2019 Click on the links below to open each issue of Light Aviation Magazine from 2019 January 2019 April 2019 July 2019 October 2019 February 2019 May 2019 August 2019 November 2019 March 2019 June 2019 September 2019 December 2019

< Back Advanced LAA Rally Camping Permits - Now closed. Camping permits can be bought onsite. Camping passes, which cover the duration of your stay, are available to purchase on arrival at a cost of £65. Camping facilities, providing basic amenities, including hot showers will be available on site. There is ample ground for caravans and mobile homes. The campsite will be open from midday Thursday 28th August and close on Monday morning 1st September. Please note entry to the Rally Exhibition Site is charged separately. Prices are for the duration of your stay. On site catering and bar will be available in the Exhibition area during event opening hours and evening food, bar and entertainment will be provided by Leicestershire Aero Club in the evenings. Next Previous

< Back LAA Alert - FAA issues AD for Piper rudder posts 14 Feb 2025 Replacement of rudder posts not made from 4130N On 13.02.25, FAA issued Airworthiness Directive 2025-02-11 which requires the replacement of the rudder post on a large number of Piper types, where the part is not made from 4130N steel. Compliance time varies between 2 years and 10 years depending on whether a beacon light is fitted to the top of the fin post and depending on the power of the engine installed. LAA Alert A-01-2025 has been created to communicate this to potentially affected owners. A-01-2025 Piper rudder post AD .pdf Download PDF • 196KB 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 New LAA Inspectors - Cameron Bunce & Brian Davies 11 Jan 2024 Back in December, seven potential LAA Inspectors attended LAA Inspector Assessment Days at Turweston with our Chief Inspector, Lucy. We are pleased to announce that all seven were successful. Here is an introduction to the first two: Cameron Bunce - Cameron is based north of Aberdeen. He is a Chartered Engineer working in the Energy Industry. He has been involved with aviation since 2007 and currently is building a VANS RV-3. He has experience with metal, composite and wooden aircraft having flown over 30 types - but most familiar with the VANS RV series. Brian Davies - Brian has experience in building and maintaining composite, metal and wood aircraft, but tends to specialise in Rotax-powered aircraft. He is also experienced in Avionic installation and trouble-shooting. Brian is also on the LAA Board of Directors and our Vice-President. Congratulations Cameron and Brian! Next Previous

< Back MTD-03-2026 Issue 1 Published – NSI CAP 140 Propeller Cracking 24 Apr 2026 MTD-03-2026 - 'NSI CAP 140 Propeller Cracking' was issued today for aircraft fitted with NSI Propeller. This MTD can be found HERE and is also attached below. in November 2024, a potentially very serious crack was reported in the propeller blade retaining cuff of an NSI CAP 140 propeller installed on a Europa aircraft with a Rotax 912-UL engine. The attached Mandatory Technical Directive, MTD-03-2026 , has been raised to withdraw approval for CAP 140 propeller blade cuffs Versions 1 and 2 and to mandate an operating life limit on blade cuffs of Version 3. This MTD replaces LAA MOD/247/005, which is now cancelled. All LAA aircraft with this propeller must be inspected in accordance with MTD-03-2026 within 5 flight hours or 30 days of the directive’s effective date, whichever comes first. The ‘white page’ logbook entry must state compliance with this MTD-03-2026 and record the inspection results. Additionally, please see below the Type Acceptance Data Sheet (TADS), which has now been written for this propeller type and references the MTD also published today. Please refer to the below documentation for full details of the mandatory inspection requirements. 20260424 - MTD-03-2026 Issue 1 - NSI CAP 140 Propeller Cracking .pdf Download PDF • 264KB TADS P34 - NSI .pdf Download PDF • 187KB Next Previous

< 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

Modifying & Repairing Aircraft One of the main features of the LAA system is that modifications and repairs can be approved with significantly reduced costs compared with aircraft on Certificates of Airworthiness, where applicants would need to deal with the CAA or EASA. Since the engineering team are all ‘little aircraft’ experts, it is usually a straight-forward job to approve many types of change. Of course, with many of our members being so creative, sometimes the job takes a little more time and thought to approve! View current mod/repair application queue Modifcation Type Description Further Details Application Form Application Fee Category Changes Applications to change an aircraft’s category from a microlight to a ‘Group A’ aircraft (and vice versa) are allocated a modification number to record the change. If an engine or propeller change is required at the same time, then an application must be made as noted above. N/A LAA/ MOD 10 £206 Engine & Propeller Changes These are treated as Prototype or Repeat modifications, unless they appear on the PTL list for the type. Technical Leaflet TL 3.02 LAA/MOD 4 and LAA/MOD 5 * See below Avionics Installations These are not considered modifications, but in order to fulfil their legal obligations, owners are required to keep LAA up-to-date should radio details alter. A special system exists for the approval of radio changes that is separate from other modifications. Technical Leaflet TL 3.03 LAA/MOD 7 No charge for radio/transponder installations, but a £31 fee is chargeable for certified ADS-B Out applications STCs Where a change has previously been approved by means of a Supplemental Type Certificate (STC), an LAA Inspector can sign off the change. Technical Leaflet TL 3.29 N/A N/A The Trivial Change Sometimes a change is so trivial that no application is required and there is no need to inform the Engineering department. Technical Leaflet TL 3.10 N/A N/A Manufacturers' Modifications Kit manufacturers and plans suppliers often have long lists of optional modifications that can be fitted and during the lifetime of a type product improvements are introduced. Generally, LAA-accepted optional items are listed on the TADS for the type. N/A N/A N/A The Standard Modification This is a modification that is very well defined and is applicable to a particular aircraft or engine type or types. Members may nominate new Standard Modifications using form LAA/MOD 9; however, LAA Engineering may choose to convert popular Repeat modifications into Standard Modifications. Technical Leaflet TL 3.06 LAA/MOD 1 Variable, see individual mods for details The Repeat Modification A modification that has already been approved on one aircraft as a Prototype modification. Note that a Repeat modification must identically replicate the original Prototype modification including fasteners and positions of parts and should generally be on the same aircraft type as the original. Technical Leaflet TL 3.07 and TL 3.17 LAA/MOD 11 * See below The Prototype ("normal") Modification This is a normal modification application made in the usual way and is applicable only to the aircraft for which the application is made. Technical Leaflet TL 3.01 LAA/MOD 2 and LAA/MOD3 * See below * All prototype modifications (including engine and propeller changes) attract a minimum fee of £103 which covers up to two hours' work; all repeat modifications (including engine and propeller changes) attract a minimum fee of £52 which covers up to one hour's work. Thereafter, work is charged at £57/hour in either case. See the relevant Technical Leaflet for the type of modification for further details. To access the Technical Leaflets, MOD forms and Standard Modifications described above, click one of the buttons below: Technical Leaflets on Modifications & Repairs LAA MOD Forms Standard Modifications

MAGAZINE ARCHIVE Our magazine archive is available for all members to view in the Members Area. This is an ongoing project. For our latest magazine, of course, you'll need to be a member. A previous copy of Light Aviation can be viewed by clicking on the link below Light Aviation ENGINEERING INFORMATION Light Aviation magazine keeps you informed of engineering issues to help you ensure that your aircraft is kept in tip top condition. Our 'Engineering Matters' articles will form a vital information source for future reference. Light Aviation Magazine Light Aviation magazine brings you exciting articles about what LAA members are building, restoring and flying. Also included are reports on all the major rallies and GA shows and information about new products and services. ADVERTISING, CLASSIFIED & CONTRIBUTION DETAILS If you wish to advertise in Light Aviation: For display and commercial advertising, please contact Phil Johnston to discuss your requirements. For classified ad queries please contact LAA Office . Classified ads and photos can only be accepted by e-mail . Classified ad fees can be found below. The Editor, Ed Hicks , is always keen to receive your contributions of articles, pictures, technical ideas and letters. Up to 30 words Member: £6 Non-Member: £22 31-50 words Member: £12 Non-Member: £44 Up to 50 words with a coloured photo Member: £45 Non-Member: £60