{"id":"F2006B10106","name":"AD/G164/20 - Fuselage Cabane Strut Wire Attach Fitting","slug":"ad-g164-20-fuselage-cabane-strut-wire-attach-fitting","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55616,"registerId":"commonwealth-F2006B10106-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/G164/20 - Fuselage Cabane Strut Wire Attach Fitting","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)  Schweizer (Grumman) G-164 (Ag-Cat) Series Aeroplanes\n\n \n\nAD/G164/20 Fuselage Cabane Strut Wire Attach Fitting 11/87\n\nApplicability: All models G164B with S/Nos 660B to 0790B and G164B-15T,-34T with S/Nos 001E to 003E.\n\n \n\nRequirement: Action in accordance with Schweizer SB No.82.\n\n \n\nCompliance: At the next scheduled inspection for maintenance release issue after 30 September and thereafter at intervals not exceeding 400 hours time in service or annually, whichever occurs first.\n\n \n\nBackground:  The manufacturer reports possible cracking of the welded fuselage cabane strut wire attachment fittings.\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\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 standard, narrow Airworthiness Directive targeting a specific airframe component on specific aircraft serial numbers. It has not expanded beyond its original safety purpose."},"complexity_factors":["Very short document (approximately 150 words of substantive content)","Only 4 defined elements: applicability (specific aircraft models/serial numbers), requirement (reference to external Service Bulletin), compliance timeframe, and background","Single external cross-reference (Schweizer SB No. 82 — the actual technical work is contained in that separate document, not here)","No nested conditions or exceptions — straightforward 'applies to X, do Y by Z' structure","Standardised AD format used across thousands of similar directives"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA).\n\n**What it does:**\nIt requires owners and operators of specific **Schweizer (Grumman) G-164 Ag-Cat agricultural aircraft** to inspect a particular part of the plane's frame — the **fuselage cabane strut wire attachment fitting** (a metal bracket that helps hold the wing support wires to the body of the aircraft).\n\n**Why:**\nThe manufacturer reported that this fitting can develop **cracks in the welds**. If left unchecked, this could lead to structural failure — potentially catastrophic during flight.\n\n**Who must comply:**\n- All **G164B** models with serial numbers **660B to 0790B**\n- All **G164B-15T and G164B-34T** models with serial numbers **001E to 003E**\n\n**What must be done:**\nOperators must follow the instructions in **Schweizer Service Bulletin No. 82** (a technical notice from the manufacturer detailing the inspection and any necessary repairs).\n\n**When:**\n- **First check:** At the next scheduled maintenance inspection after **30 September** (year not specified in this excerpt, but typically the year of issue or as amended)\n- **Repeat checks:** Every **400 flight hours** or **once a year**, whichever comes first\n\n**Why it matters:**\nThis directive prevents potential in-flight structural failures by catching fatigue cracks early. Ignoring it is illegal and puts pilots and bystanders at risk."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The document presents a single, self-contained directive applying to specified aircraft and gives a prescribed inspection requirement. The text does not indicate any amendment, expansion, or narrowing from a prior version, so there is no evidence here that the scope has changed from the instrument's original intent."},"complexity_factors":["Narrow and specific applicability by model and serial numbers (low scope breadth)","Prescriptive compliance interval (400 hours TIS or annually) simplifies scheduling rules","Dependence on an external technical document (Schweizer SB No.82) for the detailed procedure adds minor implementation dependency","No alternative compliance paths or exemptions stated in the text increases procedural clarity but may require regulatory process for deviations","Operational impacts (downtime, repairs) create ongoing recurring costs for operators despite regulatory simplicity"],"plain_english_summary":"This airworthiness directive mandates inspections of specific Schweizer (Grumman) G‑164 Ag‑Cat aeroplanes (listed by serial number) because of reported possible cracking of welded fuselage cabane strut wire attachment fittings. Operators must follow Schweizer Service Bulletin No. 82, perform the first inspection at the next maintenance release after 30 September, and repeat every 400 flight hours TIS or annually, whichever comes first.\n\nCompliance and any repairs are the operators’ responsibility and cost."}},"importantCases":[],"_links":{"self":"/api/acts/ad-g164-20-fuselage-cabane-strut-wire-attach-fitting","history":"/api/acts/ad-g164-20-fuselage-cabane-strut-wire-attach-fitting/history","analysis":"/api/acts/ad-g164-20-fuselage-cabane-strut-wire-attach-fitting/analysis","conflicts":"/api/acts/ad-g164-20-fuselage-cabane-strut-wire-attach-fitting/conflicts","importantCases":"/api/acts/ad-g164-20-fuselage-cabane-strut-wire-attach-fitting/important-cases","documents":"/api/acts/ad-g164-20-fuselage-cabane-strut-wire-attach-fitting/documents"}}