{"id":"F2006B11248","name":"AD/M20/43 Amdt 1 - Fuel Tanks - Caps, Tank Bays and Rib Stations","slug":"ad-m20-43-amdt-1-fuel-tanks-caps-tank-bays-and-rib-stations","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56968,"registerId":"commonwealth-F2006B11248-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/M20/43 Amdt 1 - Fuel Tanks - Caps, Tank Bays and Rib Stations","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)  Mooney M20 Series Aeroplanes\n\n \n\nAD/M20/43\n\nAmdt 1\n\n\nFuel Tanks - Caps, Tank Bays and Rib Stations 7/86\n\n \n\nApplicability: All models listed in the Requirement Document. Requirement:  Action in accordance with:\n\n(a)  Mooney Service Bulletin M20-229, and\n\n \n\n(b)  Mooney Service Bulletin M20-230 Rev A.\n\n \n\nNote: FAA AD 85-24-03 Amdt 39-5173 refers.\n\n \n\nCompliance: Within 100 hours time in service after 31 March 1986 or at the next scheduled inspection for Maintenance Release issue after 31 March 1986 whichever is the later.\n\n \n\nBackground:  This Directive is raised to provide an inspection procedure for the fuel filler cap and to ensure that any water does not remain trapped within the integral fuel tank wing structure. Amdt 1 updates the Requirement Document.\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 AD maintains its original narrow scope — safety inspections for fuel system integrity on a specific aircraft model. Amendment 1 is a technical update to reference documents only, not an expansion of scope."},"complexity_factors":["Very short document (under 300 words)","Only 2 defined references (Mooney Service Bulletins M20-229 and M20-230 Rev A)","Single compliance trigger (time-based deadline)","No nested exceptions or conditional logic","Straightforward applicability (all models in one aircraft series)","Minimal cross-referencing (one FAA AD mentioned in a note only)"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspections and corrective maintenance of fuel tanks and related structures on Mooney M20 aeroplanes (including filler caps, tank bays and wing rib areas) to prevent water contamination, engine failure and corrosion. Australian operators must comply within 100 hours’ flying time after 31 March 1986 or at the next scheduled maintenance, whichever is later. Amendment 1 updates the technical Requirement Document mechanics use."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Amdt 1 is described as updating the Requirement Document (Background). The AD continues to apply to the models listed in the Requirement Document and retains the same stated compliance timing; the published text does not indicate a broader change to Applicability or the Compliance window beyond the update to required actions (Requirement; Applicability; Compliance)."},"complexity_factors":["Cross‑reference to external manufacturer service bulletins (M20‑229; M20‑230 Rev A) — actions depend on those documents","Fixed compliance window tied to flight hours or the next scheduled inspection (Compliance) requiring maintenance scheduling","Applicability refers to models listed in a separate Requirement Document, requiring users to locate that list (Applicability)","Potential for follow‑on corrective work if inspections find water intrusion or damage (Background/Requirement)","Reference to Maintenance Release records for compliance verification imposes record‑keeping duties","Citation of related FAA AD increases interpretive cross‑jurisdictional linkage"],"plain_english_summary":"The Civil Aviation Safety Authority requires owners/operators of the listed Mooney M20 models to inspect fuel filler caps, tank bays and wing rib stations and to carry out the actions set out in Mooney Service Bulletins M20‑229 and M20‑230 Rev A (Requirement). Compliance must occur within 100 hours time‑in‑service after 31 March 1986 or at the next scheduled inspection for issue of a Maintenance Release after that date (Compliance). Amdt 1 updates the Requirement Document (Background)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-m20-43-amdt-1-fuel-tanks-caps-tank-bays-and-rib-stations","history":"/api/acts/ad-m20-43-amdt-1-fuel-tanks-caps-tank-bays-and-rib-stations/history","analysis":"/api/acts/ad-m20-43-amdt-1-fuel-tanks-caps-tank-bays-and-rib-stations/analysis","conflicts":"/api/acts/ad-m20-43-amdt-1-fuel-tanks-caps-tank-bays-and-rib-stations/conflicts","importantCases":"/api/acts/ad-m20-43-amdt-1-fuel-tanks-caps-tank-bays-and-rib-stations/important-cases","documents":"/api/acts/ad-m20-43-amdt-1-fuel-tanks-caps-tank-bays-and-rib-stations/documents"}}