< Back LAA Alert A-15-2025 Glasair Rudder Pedal Bearing Failures 23 Dec 2025 LAA Alert A-15-2025 Glasair Rudder Pedal Bearing Failures A recent social media report has brought attention to two rudder pedal bearing failure events on a non-LAA Glasair. These bearings attach each rudder pedal assembly to the bearing support ribs. Owners and Inspectors should carry out frequent inspections of these bearings for signs of cracking, breaking, excessive play or any other abnormalities. Pilots should also conduct effective full-and-free movement checks during taxiing to ensure correct rudder pedal operation prior to take-off. If there are any doubts on the bearings’ condition, age, or origin, they should be replaced with newly made ones. Instructions on how to make new bearings from a 3/4" UHMWPE sheet can be found in the Stoddard-Hamilton Instruction Manual. Please refer to the LAA Alert A-15-2025 HERE or below for full details and recommended checks. A-15-2025 Glasair Rudder Pedal Bearing Failures .pdf Download PDF • 309KB Next Previous

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.

Light Aviation Magazine 2016 Click on the links below to open each issue of Light Aviation Magazine from 2016 January 2016 April 2016 July 2016 October 2016 February 2016 May 2016 August 2016 November 2016 March 2016 June 2016 September 2016 December 2016

Continuing Airworthiness Information One of the key strengths of the LAA's system is that we can monitor the fleet centrally and keep track of airworthiness incidents from around the world. Where necessary, we can then let our owners know, to help them keep flying safely. A full listing of Airworthiness Alerts, Technical Service Bulletins and Mandatory Technical Directives can be found below: ALERTS, TECHNICAL SERVICE BULLETINS & MANDATORY TECHNICAL DIRECTIVES

Association Documents Memorandum of Association Click here... Articles of Association Click here... Directors' Code of Conduct Click here... Guidelines & Terms of Reference Click here... Rules of the LAA Click here... Strut Governance Documents Click here...

LAA are proud to announce our Rally 2025 sponsors Exhibitor Information TERMS & CONDITIONS LAYOUT OUTSIDE PRICES BOOKING FORM LAYOUT INSIDE MARQUEE

LAA are proud to announce our Rally 2025 sponsors Entrance Fees All fly-in slot bookings for the event are available via the Eventbrite (coming soon) booking website. Member and public entrance tickets can be bought in advance via the LAA Shop. There is free car parking and provision for disabled parking on site. For those arriving by road, Leicester Airfield is easily reached from the north and southwest via J21 on the M1; A563 Sth Leicester Bypass to B582 Gartree Road. Routes from the East and South East via A47 and A6. No dogs are allowed airside BY AIR One landing fee of £10.00 covers a single landing and stay of up to three days and camping by your aircraft. Pilots and accompanying passengers will also need to purchase individual entry tickets to the Rally - available via the LAA Shop . If flying in, you will need to book a slot. PLEASE NOTE ANY FURTHER LANDINGS WILL BE CHARGED. (Local evening flying will be available and not charged) Members : INCLUDES AIRSIDE ACCESS £25 (for all 3 days) LAA, BMAA and BRA members - Please bring proof of membership by way of showing your receipt or mobile phone with membership details. More details on how to find this will be emailed to all members nearer the time. Non-Members £25 for One Day Ticket (does not include airside access) Special Offer!!! Non Member Three Day Ticket (including airside access) for £50. This offer is available until 31st July 2025. Non-Members AIRSIDE ACCESS £15 for One Day Ticket Children 16 and under go free.

LAA are proud to announce our Rally 2025 sponsors Camping and Accommodation Camping passes, which cover the duration of your stay, are available upon arrival, at a cost of £65 . If you fly in and wish to camp under the wing, this is free. 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.

LAA Member Discounts

LAA Type Clubs British Rotorcraft Association W: www.britishrotorcraftassociation.org T: 07841870568 E: [email protected] Pietenpol Club W: www.pietenpolclub.uk E: [email protected] The Aeronca Club of Great Britain W: www.aeronca.co.uk T: 01752 406 660 E: [email protected] The Europa Club W: www.theeuropaclub.org E: [email protected] Vintage Aircraft Club W: www.vintageaircraftclub.org.uk E: [email protected] Vintage Piper Aircraft Club W: www.vintagepiper.co.uk E: [email protected] International Auster Club W: www.austerclub.org British Women Pilots' Association W: www.bwpa.co.uk E: [email protected] Beagle Pup & Bulldog Club W: www.bpbc.uk T: 07985 430265 E: [email protected]

Continental Covering Letter to Owners AAN PFA 999-413 Sup 3 Approved Mogas Aircraft/Continental Engine combinations Inspection Checklist

LAA Clubs & Struts FIND MY LOCAL CLUB/STRUT Local Clubs, or Struts, as many of them are called, look forward to welcoming you along as a friend and fellow LAA member. They are an excellent source of advice and help, whether building, buying, training or simply wanting to be involved in the local aviation scene. The Clubs and Struts also arrange a number of flying and social events throughout the year, and most hold monthly meetings. LAA TYPE CL UBS You can also find details of LAA-Type clubs by clicking the icon below. These clubs are associated to the LAA and are dedicated to a specific aircraft manufacturer or model. They can offer social activities and technical support for owners or those interested in a particular type.