Operating & Maintaining Aircraft This section is intended to cover everything that happens once the aircraft is in a flying state. From a technical point of view, the most import of these is keeping on top of the aircraft’s maintenance. This is critical in enabling an owner to meet their obligation to maintain the aircraft in an airworthy condition. AIRCRAFT MAINTENANCE AVGAS UL91 & UL94 ETHANOL-FREE MOGAS WEIGHT & BALANCE E5 MOGAS REVALIDATING A PERMIT TO FLY 97 OCTANE SUPER-UNLEADED E10 MOGAS - NOT APPROVED

< Back Van's Aircraft laser-cut parts - update 20 Oct 2023 Since our mention of this issue in the August edition of Light Aviation , Van’s Aircraft have been toiling away analysing and testing various structural elements to establish the effect that the laser cutting of parts has had on their strength and fatigue life. Detailed updates can be found on their website, but understandably UK builders and operators are seeking clarity on what the endgame will be on this issue. As the issue generally affects potential fatigue life, there is no immediate need to take action. In discussion with Rian Johnson, Van’s President and Chief Engineer, he tells us that they’re working on service information for the fleet that they expect to be published by the end of the year. Having worked closely with Van’s over many years, our expectation is that we will endorse their position. Next Previous

< Back Alert A-10-2025 - Cracking in E-Props Carbon Propeller Hubs 28 Aug 2025 LAA Alert A-10-2025 - Cracking in E-Props Carbon Propeller Hubs A recent report of a crack appearing on an E-Props carbon composite propeller hub was received by the British Microlight Aircraft Association (BMAA). The crack was in the flange forming the periphery of the circular hub, in the close vicinity of one of the bolts in the outer ring of blade clamping bolts. Alert A-10-2025 shows photographs of the crack discovered and details required actions if cracks are found on LAA aircraft. A-10-2025 is available HERE and shown below. A_10_2025_E_Props_Propeller_Hub_Cracking_Issue_1 .pdf Download PDF • 382KB Next Previous

< Back MTD-05-2025 Issue 3 published - Eurofox Rudder Pedals 7 Jan 2026 MTD-05-2025 Issue 3 has been published to provide further information on the situation as it develops and asking Owners and Inspectors to report back. The inspection schedule in unchanged from Issue 1 or Issue 2. Therefore, Issue 3 does not require you or your Inspector to do anything different. If your aircraft has already been inspected to MTD-05-2025 Issue 1 or Issue 2, then the next time an inspection in accordance with the MTD is due, you Inspector should reference Issue 3 in their logbook entry. LAA is continuing to work towards achieving a permanent solution via a modification to the rudder pedal/torque tube design. MTD-05-2025 Issue 3 is attached below and can be found on the website HERE . 20260107 - MTD-05-2025 Issue 3 - Eurofox Rudder Pedal Cracking .pdf Download PDF • 883KB Next Previous

< Back New LAA Inspector - Mike Wigg 22 Sept 2025 We are pleased to welcome Mike Wigg as a new LAA Inspector, having attended an LAA Inspector Assessment Day at Turweston recently. With a deep passion for vintage aeroplanes, Mike strives to bring joy to all enthusiasts by keeping these remarkable vintage aircraft flying. With extensive engineering experience from both military and civilian sectors, he is dedicated to supporting owners in maintaining their beloved planes. Based near Duxford in Cambridgeshire, Mike travels across the UK and beyond to ensure these classic aeroplanes remain airworthy. If you're an owner in need of maintenance, repair, or inspection, please don't hesitate to reach out! Next Previous

< Back LAA Alert for Rotax 900 series engines regarding the oil spray nozzle 18 Dec 2024 Inspection and/or Replacement of Oil Spray Nozzle On 16.12.24, Rotax issued a new MANDATORY Service Bulletin SB 912 i-016/SB 915 i-016 / SB 916 i-006 which calls 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. 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 .pdf Download PDF • 205KB Next Previous

< Back Engineering updates in December 2 Jan 2025 The following documents have been issued/updated in the Engineering 'Info Library' during December. Continuing airworthiness information: Mandatory Technical Directive 07-2024 - Eurofox trim cables Alert 03-2024 - Eurostar trim cables Alert 04-2024 - Loose Rotax engines Alert 05-2024 - Rotax 900 series engines - blocked oil spray nozzle Technical Leaflets: TL 2.22 'non-type specific MPDs' TADS : Sling 4 TSi Wishing all our members a very Happy New Year. Next Previous

< Back New LAA Inspector - Malcolm Talbot 14 Jul 2025 We are pleased to welcome Malcolm Talbot as a new LAA Inspector, having attended an LAA Inspector Assessment Day at Turweston recently. Malcolm holds a BSc(Hons) with the Open University in Maths, Technology and Engineering. He has held a PPL since 2010 and been a Flight Instructor FI since 2019, (having passed the CPL theory exams),. He is currently instructing for Moray Flying Club and Highland Aviation, and recently become a ground examiner. Malcolm built and flies a Eurofox, which first flew in 2013. He thoroughly enjoyed the build process. Next Previous

< Back MTD-05-2024 - Jabiru Distributor Caps - Issue 2 23 Jul 2025 MTD-05-2024 - Jabiru Distributor Caps - has been upissued to Issue 2 today. This MTD can be found HERE and is also available below. On 10th July 2024, LAA Engineering published Issue 1 of MTD-05-2024. This was published due to apparent variations in the design of the distributor caps and rotor arms on Jabiru 2200 engines, which meant that, in some cases, there was insufficient clearance between the rotor arm and centre boss of the distributor cap, causing the contact button of the distributor cap to be flattened against its range of travel by the rotor arm, which causes extremely accelerated wear leading to ignition issues and potential engine failures. Today, Issue 2 of MTD-05-2024 has been issued, superseding Issue 1. Issue 1 of MTD-05-2024 detailed a method for ensuring sufficient clearance between the centre boss of the distributor cap and the rotor arm. This method has now been superseded by Jabiru’s Service Bulletin JSL050. LAA MTD-05-2024 Jabiru distributor cap Iss 2 .pdf Download PDF • 294KB Next Previous

< Back New LAA Inspector - Mark Bodger 23 Oct 2024 The LAA is pleased to welcome Mark Bodger as a new LAA Inspector. Mark has considerable experience on metal and wooden aircraft. He has rebuilt a Turbulent, Nipper, Colibri, Pitts, Vans RV-4 and completed new build projects including an Isaacs Fury and plans Replica SE5a. He has experience in VW engines, having rebuilt several. In his 30 years of LAA membership, he has owned over 20 LAA types, giving him a broad exposure to the maintenance of different aircraft. He also has the facilities to weigh aircraft. Congratulations Mark! 🎉 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 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