{"id":"F2006B07199","name":"AD/SWSA226/58 Amdt 1 - Main Landing Gear Doors","slug":"ad-swsa226-58-amdt-1-main-landing-gear-doors","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":48914,"registerId":"commonwealth-F2006B07199-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SWSA226/58 Amdt 1 - Main Landing Gear Doors","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Fairchild (Swearingen) SA226 and SA227 Series Aeroplanes\n\n \n\nAD/SWSA226/58\n\nAmdt 1\n\n\nMain Landing Gear Doors 10/90\n\n \n\nApplicability: As listed in the applicable Requirement Document.\n\n \n\nRequirement: Action in accordance with Fairchild SBs SA226-32-055 or SA227-32-027 as applicable.\n\n \n\nNote: FAA AD 90-05-06 R1 Amendment 39-6519 as revised by Amendment 39-6668 refers.\n\n \n\nCompliance: Within 100 hours time in service after 12 July 1990 or at the next inspection for Maintenance Release issue after 12 July 1990 whichever is the later.\n\n \n\nBackground: There have been incidents overseas where the MLG doors have jammed against the nacelle and thus preventing gear extension.\n\n \n\nAmendment 1 reflects the revised FAA AD status.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a narrow, technical safety directive focused on a specific mechanical defect in specific aircraft models. Amendment 1 merely updates the reference to match revised US FAA requirements — it does not expand the scope beyond the original landing gear door safety issue."},"complexity_factors":["Very short document (approximately 200 words)","Only 4 operative provisions: applicability, requirement, compliance, and background","Single cross-reference to FAA AD and manufacturer service bulletins","No defined terms section — relies on external technical documents","Simple conditional logic (whichever is the later)","No nested exceptions or complex procedural requirements"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for specific aircraft.\n\n**What it does:**\nIt requires owners and operators of certain **Fairchild (Swearingen) SA226 and SA227 series aeroplanes** to inspect and fix a problem with the **main landing gear doors**.\n\n**The safety issue:**\nOverseas, there have been cases where these doors jammed against the engine housing (the \"nacelle\"), which stopped the landing gear from extending. A plane that can't put its wheels down is obviously in serious danger.\n\n**What must be done:**\nOperators must follow specific instructions in **Fairchild Service Bulletins SA226-32-055 or SA227-32-027** (technical repair notices from the manufacturer) depending on which aircraft model they have.\n\n**When it must be done:**\nWithin **100 hours of flying time** after 12 July 1990, or at the next scheduled inspection for issuing a Maintenance Release (a certificate saying the plane is safe to fly) — whichever comes later.\n\n**Why Amendment 1 matters:**\nThis update aligns the Australian directive with a revised **US Federal Aviation Administration (FAA) directive** (AD 90-05-06 R1), ensuring Australian rules match the latest international safety standards.\n\n**Who it affects:**\nAnyone who owns, operates, or maintains these specific Fairchild aircraft models in Australia."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"Amendment 1 updates the AD to reflect the revised FAA AD status but does not change the AD's stated requirement: operators must carry out the Fairchild service bulletin actions within the same compliance timing set out in the directive ('Amendment 1 reflects the revised FAA AD status')."},"complexity_factors":["Applicability is delegated to an external 'applicable Requirement Document' (the specific affected serials/models are not listed in the AD text).","Mandated actions are by reference to external technical documents: Fairchild SB SA226-32-055 or SA227-32-027.","Cross-reference to FAA AD 90-05-06 R1 (and its amendments) creates inter-jurisdictional linkage and reliance on foreign regulator updates.","Compliance timing is conditional (within 100 hours after 12 July 1990 or at next Maintenance Release inspection, whichever is later), adding an administrative scheduling element.","Implementation requires technical maintenance work (parts, labour, certified maintenance personnel) though the AD does not specify those operational details."],"plain_english_summary":"This airworthiness directive requires operators of Fairchild (Swearingen) SA226 and SA227 series aeroplanes (as listed in the applicable Requirement Document) to carry out the inspections/modifications described in Fairchild Service Bulletins SA226-32-055 or SA227-32-027 to stop main landing gear (MLG) doors jamming and preventing gear extension. Compliance must occur within 100 hours time in service after 12 July 1990 or at the next Maintenance Release inspection, whichever is later. Operators fund the work and must instruct maintenance organisations to perform it."}},"importantCases":[],"_links":{"self":"/api/acts/ad-swsa226-58-amdt-1-main-landing-gear-doors","history":"/api/acts/ad-swsa226-58-amdt-1-main-landing-gear-doors/history","analysis":"/api/acts/ad-swsa226-58-amdt-1-main-landing-gear-doors/analysis","conflicts":"/api/acts/ad-swsa226-58-amdt-1-main-landing-gear-doors/conflicts","importantCases":"/api/acts/ad-swsa226-58-amdt-1-main-landing-gear-doors/important-cases","documents":"/api/acts/ad-swsa226-58-amdt-1-main-landing-gear-doors/documents"}}