{"id":"F2006B05049","name":"AD/CESSNA 180/37 Amdt 1 - Wing Strut Attachment Strap","slug":"ad-cessna-180-37-amdt-1-wing-strut-attachment-strap","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44959,"registerId":"commonwealth-F2006B05049-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 180/37 Amdt 1 - Wing Strut Attachment Strap","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)  Cessna 180, 182 and Wren 460 Series Aeroplanes\n\n \n\nAD/CESSNA 180/37\n\nAmdt 1\n\n\nWing Strut Attachment Strap 9/73\n\n \n\nApplicability: All model 180 with S/Nos. 18052335 to 18052349 and all model 182 with S/Nos.\n\n18261960 to 18262101 and 18262104.\n\n \n\nRequirement: Action in accordance with Cessna SL SE73-20 (Supplement No. 1). Compliance:  Within 100 hours time in service after 24 September 1973.\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\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific mechanical defect in specific aircraft. It has not expanded beyond its original purpose of mandating inspection/repair of wing strut attachment straps on the identified Cessna models."},"complexity_factors":["Extremely short document (approximately 150 words)","Only 3 defined applicability criteria (specific serial number ranges)","Single requirement referencing an external technical document (Cessna SL SE73-20)","Simple compliance condition (time-in-service hours)","No nested exceptions, cross-references to other legislation, or conditional logic","No interpretation section or defined terms"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety notice issued by Australia's Civil Aviation Safety Authority (CASA) for specific aircraft.\n\n**What it does:**\nOrders owners and operators of certain Cessna 180 and 182 aeroplanes (plus Wren 460 series) to inspect and fix a problem with the **wing strut attachment strap** — a critical component that helps hold the wing to the fuselage. If this strap fails, the wing could detach in flight.\n\n**Who it affects:**\n- Cessna 180 aircraft with serial numbers 18052335 to 18052349\n- Cessna 182 aircraft with serial numbers 18261960 to 18262101 and 18262104\n\n**What must be done:**\nOperators must follow the instructions in **Cessna Service Letter SE73-20 (Supplement No. 1)** — a technical bulletin from the manufacturer detailing the inspection and repair procedure.\n\n**When it must be done:**\nWithin **100 hours of flying time** after 24 September 1973.\n\n**Why it matters:**\nThis directive prevents catastrophic structural failure. Wing strut attachments are load-bearing; corrosion or fatigue in these straps could lead to wing separation and loss of the aircraft. The compliance deadline ensures the fix happens quickly without grounding fleets immediately."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"The instrument is labelled as Amendment 1 (Amdt 1), which indicates it amends a prior AD. The presented text itself specifies the current applicability, the required action (by reference to Cessna SL SE73-20 Supplement No. 1) and the compliance deadline, but it does not include the original AD text or a description of what was changed. Therefore it is clear this is an amendment, but the specific differences from the original AD are not stated in the provided text."},"complexity_factors":["Narrow applicability defined by specific serial numbers (requires owners to check S/N) (Applicability)","Mandatory action references an external manufacturer document (Cessna SL SE73-20 Supplement No. 1), requiring access to that document (Requirement)","Technical aviation maintenance subject matter (wing strut attachment strap) which requires specialist labour and judgement","Fixed, short compliance window (100 hours TIS after 24 Sept 1973) creates operational scheduling constraints (Compliance)","The AD prescribes method via the service letter, limiting alternative compliance routes and increasing dependence on that document's clarity"],"plain_english_summary":"This AD requires owners/operators of the listed Cessna 180/182 (and noted Wren 460) serial numbers to have the wing strut attachment strap inspected/mod ify per Cessna SL SE73‑20 (Supplement No.1) within 100 hours TIS after 24 Sept 1973. It matters because compliance—performed by maintenance providers at owner expense—is mandatory to address the stated airworthiness concern."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-180-37-amdt-1-wing-strut-attachment-strap","history":"/api/acts/ad-cessna-180-37-amdt-1-wing-strut-attachment-strap/history","analysis":"/api/acts/ad-cessna-180-37-amdt-1-wing-strut-attachment-strap/analysis","conflicts":"/api/acts/ad-cessna-180-37-amdt-1-wing-strut-attachment-strap/conflicts","importantCases":"/api/acts/ad-cessna-180-37-amdt-1-wing-strut-attachment-strap/important-cases","documents":"/api/acts/ad-cessna-180-37-amdt-1-wing-strut-attachment-strap/documents"}}