< Back Mandatory Technical Directive issued for Sting S4 29 Sept 2023 LAA has been working with TL StingUK to correct an issue found during the flight testing of the factory-built version of the aircraft. It was found that the type would consistently drop the starboard wing more than the permitted maximum during a wings-level stall. LAA Mandatory Technical Directive MTD-01-2023 has been issued that requires the installation of a stall strip on the starboard wing and two stall strips on the port wing, along with restricting the elevator travel, in accodance with TL StingUK service bulletins 0002 and 0003, before further flight. Next Previous

Light Aviation Magazine 2023 Click on the links below to open each issue of Light Aviation Magazine from 2023 January 2023 April 2023 July 2023 October 2023 February 2023 May 2023 August 2023 November 2023 March 2023 June 2023 September 2023 December 2023

< Back New LAA Inspector - Neil Oakman 22 Sept 2025 We are pleased to welcome Neil Oakman as a new LAA Inspector, having attended an LAA Inspector Assessment Day at Turweston recently. Neil’s interest in aviation began during his early years living near the former RAF Sawbridgeworth airfield. Each summer, he would cycle to the edge of the old perimeter track to watch Piper Pawnee crop-spraying aircraft take off and land, sparking a lifelong enthusiasm for flight. After leaving school, Neil studied engineering and began working at local airfields, gaining hands-on experience with a variety of vintage aircraft ranging from Piper Cubs to the Sea Hurricane. This provided a strong foundation in both traditional aircraft construction and maintenance practices. He later pursued a career as a commercial pilot. Further details of his flying background can be found on his coaching profile on the LAA website. Throughout his aviation career, Neil has maintained his own aircraft as well as those of colleagues. This has given him a broad practical knowledge of types such as the De Havilland Chipmunk and the Scottish Aviation Bulldog, along with experience in maintaining aircraft constructed from metal, wood, and fabric. While his exposure to carbon and composite structures is limited at present, he is keen to expand his skills in this area as it represents a growing sector within the sport aviation community. As an LAA Inspector, Neil is committed to supporting aircraft owners by providing practical advice and guidance to help ensure their aircraft are operated and maintained to the high standards of safety, airworthiness, and reliability required by the LAA. Next Previous

Revalidating a Permit to Fly Revalidating the Permit to Fly on your aircraft involves a simple three-step process, as outlined below: START APPLICATION HERE More detailed information is available by clicking the buttons below: Step-by-Step Video Guide TL 2.00 - Permit Revalidation Frequently Asked Questions Check Flight Form, PFRC & Inspector Crib Sheet

E10 Mogas From 1st September 2021, the government mandated that all regular grade unleaded petrol must contain up to 10% ethanol, rather than up to 5% as previously. In the autumn of 2021, most filling stations around the UK re-marked their E5 petrol pumps to show that they now supply E10 specification fuel, and started receiving tanker-loads blended with up to 10 percent ethanol content. For the automotive world this means reduced carbon dioxide emissions, which is better for the environment, and, arguably in terms of eco-desirability, a small further reduction in the reliance on fossil fuel. The automotive industry had been preparing for this change, and people with road vehicles registered after 2002 should be able to switch to E10 without noticing any difference. Unfortunately, the additional ethanol content is bad news for aviation users if we were to ignore the change and start putting E10 in our aircraft regardless. Ethanol is a powerful chemical solvent which can attack components including rubberised gaskets and fuel pipes, older lacquered carburettor floats and composite or plastic components in some newer fuel systems. The doubling of the concentration of ethanol in E10 compared to E5 makes it much more likely that problems will be experienced if these parts are not designed to be ethanol-proof. Ethanol also has an affinity for absorbing water, which over time can then become acidic, attacking metal components in the fuel system and engine. Even if there was a practical way to do so in the volumes of fuel we use in our aircraft, we cannot safely remove the ethanol content from the fuel because the ethanol acts as an octane enhancer, so the washed-out fuel would be left with a reduced octane value, likely to cause detonation problems. Another issue is that ethanol-blended fuel has a lower energy density than petrol, so to develop full power from our engines using an E10 fuel, we may need to richen the fuel/air mixture, for example using a bigger carburettor jet size. Owners of Rotax and Jabiru engines are probably already aware that many of these engines are supplied as being able to use E10 fuel – though with Jabiru engines, in particular, it’s far from straightforward because some of the earlier engines require cylinder head modifications and reduced compression ratio if they are to avoid detonation issues when using any form of Mogas. Jabiru also say that Mogas of any type should not be used in commercial flight schools and only at the owners own risk. Even with a supposedly E10-compatable engine, the chemical compatibility problems with fuel system components are such that the LAA does not at present approve the use of E10 Mogas in any LAA amateur-built or vintage aircraft. For factory-built microlights and factory-built gyroplanes, where LAA is not the approving authority but only renews the CAA’s Permits to Fly, owners need to refer to the TADS for the types for details of the approved fuel types, and monitor the service bulletins from the approved manufacturers for news of any updates. Where we need to be particularly careful in reading-across from (hopefully) a trouble-free transition to E10 in automotive use is the big difference between our petrol cars and the way our aircraft engines are configured. Our cars generally have submerged fuel pumps in their petrol tanks and a sealed fuel system. In our aircraft we have an open-vented tank and usually a fuel pump several feet away, often mounted in a hot area of the engine bay near to the engine exhaust, dragging the fuel through a fairly convoluted pipework system, a filter and fuel selector – all features encouraging a vapour lock - and then to make matters worse we want to climb up to altitude and operate in reduced atmospheric pressure. Modern petrol cars have a fuel injection systems rather than carburettors, a circulating fuel system designed to purge any vapour forming in the fuel line, and an ECU that monitors the engine’s parameters constantly and adjusts the fuel mixture strength and ignition timing to prevent damage to the engine – and if all else fails and the engine should ‘pink’, we can hear it from the driver’s seat and drop a gear to lighten the load. Because of the much higher background noise level in our aircraft, detonation cannot be heard and the pilot’s first indication of a problem may be when the first piston crown disintegrates, or a valve head departs its stem. In conclusion - E10 is presently not approved for use in any LAA aircraft. ‘Hoping for the best’ and using E10 fuel in your aircraft regardless could risk ruining the fuel system components, fibreglass tanks falling to bits, engine failure through contamination of the fuel or ruptured fuel pump diaphragms etc, or more serious engine damage. For most of our engines, UL91 Avgas is the best choice, but 97 octane E5 Super Unleaded remains an alternative to the now-obsolete E5 spec Mogas.

< Back Alert A-07-2025 - Glastar Aileron Servo-Tab Pushrod Cracking 25 Jul 2025 LAA Alert A-07-2025 - Glastar Aileron Servo-Tab Pushrod Cracking A cracked aileron servo-tab pushrod was found on a UK Glastar aircraft. The pushrod consists of a thin-walled aluminium tube with an adjustable clevis at one end, and a fixed clevis at the other. The crack was at the adjustable end of the pushrod, and extended from the end of the aluminium tube to the hole approximately 1 inch from the end. A cracked aileron servo-tab pushrod must be considered unairworthy, and replaced before further flight. A-07-2024 can be found HERE and is also attached. A-07-2025 - Glastar Aileron Servo-Tab Pushrod Cracking .pdf Download PDF • 562KB Next Previous

< Back Inspector Renewal 19 Mar 2024 It's that time of year again! LAA Inspector Authorisations lapse at the end of this month. Renewing is simple, available both on and offline. In order to renew this year, Inspectors need to carry out two simple steps, which are as follows: Complete and sign the ' Inspector Declaration, ' which was emailed to all Inspectors on 4th March, and return to LAA Engineering, either as a scanned document or in the post. Pay the Inspector Renewal Fee , which is £40 and covers administration of an Inspector Authorisation throughout the year. (For Inspectors of Factory Built Gyroplanes, there is no longer an additional fee. All Inspectors pay £40). Inspectors can pay via the LAA shop, found here , or by giving us a call with their payment card details. Alternatively, Inspectors can pay by Bank Transfer. Inspectors' continuing support is crucial and we sincerely hope that all Inspectors will renew. Next Previous

The Annual General Meeting of the Light Aircraft Association Ltd Whittlebury Hall, Northants, NN12 8QH 19th October 2025, 1200 hrs N otice has been given that the AGM of the Light Aircraft Association (LAA) will be held at Whittlebury Hall, Whittlebury, Towester, NN12 8QH Sunday 19th October 2025, 1200hrs The AGM will provide for both in person and remote on-line participation. These arrangements will be professionally administered. In addition, those unable to attend may elect to submit proxy votes. A full list of nominations, Motions and Association documents links can be found below: The AGM will be preceded by the presentation of LAA Service, Rally Trophies and Awards to members. Following the AGM there will be time reserved for a Member’s Forum for discussion and Q&A on general matters with the Board and CEO. Light refreshments will be available upon arrival and lunch will be available to purchase at the Silverstone Bar, Atrium Clubhouse and Murrays restaurant. If you have any questions or comments for the AGM or the Member’s Forum please get in touch with us via [email protected] AGM DOCUMENTS Agenda Minutes of AGM 2024 Accounts and Chairman's Report 2024 Motion Director Nominations ~~~ How to vote if NOT attending the AGM in person This year we have an independent company, Mi-Voice, who will be issuing and counting the proxy forms. If we have an email address for you and you are eligible to vote (ie/ a beneficial shareholder) you will receive an email from them directly with a link to the proxy form.

< Back Alert A-11-2025 - Eurostar aileron rose joint and rudder hinge inspection 8 Oct 2025 LAA Engineering has issued Alert A-11-2025 to highlight the recent issue of an Airmasters service bulletin that requires checks on the integrity of a rose joint in the aileron controls and the rudder hinge, following examples of these joints migrating and jamming aileron controls. Following the up-issue of Airmasters SB/EUR/023 to issue 3, on 07/10/25 CAA has issued MPD 2025-004-E to mandate the checks contained in the SB, which supersedes MPD 2025-003-E initially issued on the subject. A-11-2025 - Eurostar Rose Joints issue 1 .pdf Download PDF • 372KB Next Previous

< Back New LAA Inspectors - Umberto Izzo & Simon Boynett 26 Jan 2024 It is time to introduce you to two more new LAA Inspectors - Umberto Izzo and Simon Boynett, who both attended an LAA Inspector Assessment Day in December, with our Chief Inspector, Lucy. Umberto's experience is mainly in general aviation and microlight aircraft (metal, fabric and composites), either Lycoming, Continental or Rotax-powered. He is also IRMT-approved. He owns a share in Jodel 1050. Simon is a retired Licensed Aircraft Engineer with 44 years of experience working on Commercial Passenger and Cargo aircraft. He has a B1 and B2 CAA licence (Airframes, Engines and Electrical generation systems) B2 (Avionics, Auto flight, Auto land systems, Radio and Radar). In addition to this, he has an FAA issued A & P licence. He put a lot of blood, sweat and tears into building his own Vans RV 7, that he still loves to fly today as often as he can. Although retired, he still has aeroplanes and safety in his blood and looks forward to helping others to keep the high standards the LAA require, and to advise and certify Maintenance and Permit to Fly revalidation inspections. Next Previous

< Back LAA Rally and Service Awards 2025 24 Oct 2025 A list of awards can be found below: LAA Awards .pdf Download PDF • 139KB Next Previous

< Back Alert 05-2024 - Rotax Oil Spray Nozzles - upissued to Issue 2 24 Jul 2025 LAA Alert 05-2024 - Inspection and/or Replacement of Oil Spray Nozzle in some Rotax 900 series engines - upissued to Issue 2 On 16.12.24, Rotax issued a MANDATORY Service Bulletins SB 912 i-016/SB 915 i-016 / SB 916 i-006 and SB-912 i-016iS / SB-915 i-016iS / SB-916 i-006iS which call for urgent action for engines of specified models within certain serial number ranges, if the engine has run for less than 200 hours from new, or engines which have been fitted with specific overhaul kits supplied between 01.01.22 and 31.10.24 inclusive. Therefore, LAA Alert A-05-2024 was issued on 17th December 2024 regarding this. Subsequently, a revision to the Rotax Service Bulletins was issued on 20.12.24, entitled MANDATORY Alert Service Bulletins ASB 912 i-016 R1/ASB 915 i-016 R1 / ASB 916 i-006 R1 and ASB-912 i-016iS R1 / ASB-915 i-016iS R1 and ASB-916 i 006iS R1. Therefore, on 23rd July 2025, LAA Alert A-05-2024 was upissued to Issue 2, which now supersedes Issue 1. A-05-2024 Issue 2 can be found HERE and is also found below. The bulletin concerns problems with a possible full or partial blockage of the oil spray nozzle due to an excessive application of Loctite at the manufacturing stage, when assembling the sprag clutch housing. This can lead to inadequate cooling of the stator assembly, potentially causing loss of electrical power to the engine’s ECU. A-05-2024 Rotax Engine Oil Spray Nozzle Issue 2 .pdf Download PDF • 232KB Next Previous