{"id":"F2006B06875","name":"AD/SD3-60/30 - Stub Wing and Outer Wing Strut Attachment Fittings","slug":"ad-sd3-60-30-stub-wing-and-outer-wing-strut-attachment-fittings","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114755,"registerId":"commonwealth-F2006B06875-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SD3-60/30 - Stub Wing and Outer Wing Strut Attachment Fittings","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)  Short SD3-60 Series Aeroplanes\n\n \n\n# AD/SD3-60/30 Stub Wing and Outer Wing Strut Attachment Fittings\n\nApplicability: All models serial number SH301 to SH3642 inclusive.\n\n# 11/90\n\n \n\nRequirement: Inspect the left and right outer wing to strut attachment fittings and left and right stub wing to strut attachment fittings, as applicable by serial number, in accordance with Shorts SD3-60 Service Bulletin SD360-57-12.\n\n \n\nNote 1: UK CAA has classified this action as mandatory.\n\n \n\nNote 2: Embodiment of Service Bulletin SD360-57-03 will constitute terminating action for the purposes of this AD.\n\n \n\nCompliance: Prior to the accumulation of 9600 flight hours or prior to 29 November 1990 whichever is the later, and thereafter at intervals not to exceed 600 hours component time in service.\n\n \n\nBackground: Damage tolerance evaluation of the SD3-30 type fittings installed on the affected aircraft has indicated that the maximum safe inspection interval is 600 hours.\n\nUndetected fatigue cracks in these fittings could result in loss of structural integrity of the wing. The manufacturer is currently developing a modification that will preclude the need for repetitive inspections.\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":{"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The AD's stated scope is confined to SD3‑60 aircraft serial numbers SH301–SH3642 and to specified attachment fittings. It imposes inspection requirements and identifies a terminating modification; there is no indication in the text that the scope departs from the document's stated safety rationale."},"complexity_factors":["Technical subject matter: fatigue, damage‑tolerance and wing attachment fittings require specialist maintenance knowledge and inspection procedures.","Dependency on external document: the AD mandates inspections 'in accordance with' Service Bulletin SD360‑57‑12 (procedures and acceptance criteria not reproduced in the AD).","Serial‑number limited applicability: applies only to aircraft SH301–SH3642, requiring operators to check fleet records.","Mixed compliance triggers: initial compliance tied to either flight‑hour accumulation (9,600 hours) or a calendar date (29 Nov 1990), then recurrent 600‑hour intervals.","Terminating action conditionality: repetitive inspections cease only when modification SD360‑57‑03 is embodied, linking ongoing burden to availability/adoption of a retrofit.","Safety criticality and operational impact: potential for significant downtime and cost if cracks are found, increasing monitoring and maintenance scheduling complexity."],"plain_english_summary":"This Airworthiness Directive requires operators of Short SD3‑60 aeroplanes (serial numbers SH301–SH3642) to inspect left/right outer wing‑to‑strut and stub‑wing‑to‑strut attachment fittings in accordance with Shorts Service Bulletin SD360‑57‑12. Initial inspection must occur before 9,600 flight hours or by 29 November 1990 (whichever is later), then every 600 flight hours.\n\nOperators or their maintenance providers must carry out and pay for the inspections and related downtime; embodying modification SD360‑57‑03 ends the repetitive inspections. The AD follows a damage‑tolerance evaluation that found fatigue‑crack risk to wing integrity."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific structural fatigue issue in a particular aircraft model. It has not expanded beyond its original purpose of ensuring safe operation of Short SD3-60 wing attachment fittings."},"complexity_factors":["Single, specific aircraft type and serial number range (SH301-SH3642)","Only one substantive requirement (inspection of four fittings)","Clear compliance deadline with simple 'whichever is later' logic","Two brief notes providing context and terminating action","No defined terms section, no cross-references to other legislation beyond the referenced Service Bulletin","Background section is explanatory rather than creating additional legal obligations","Total length is approximately 200 words of substantive content"],"plain_english_summary":"This AD mandates inspections of the wing-to-strut attachment fittings on Short SD3-60 (Short 360) aeroplanes with affected serials to detect fatigue cracks that could compromise wing integrity. It affects operators of these regional turboprops in Australia and addresses a known risk of crack growth seen on related models.\n\nCompliance follows the manufacturer’s inspection procedure and allows a specified modification as a terminating action to remove the recurring inspection requirement."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sd3-60-30-stub-wing-and-outer-wing-strut-attachment-fittings","history":"/api/acts/ad-sd3-60-30-stub-wing-and-outer-wing-strut-attachment-fittings/history","analysis":"/api/acts/ad-sd3-60-30-stub-wing-and-outer-wing-strut-attachment-fittings/analysis","conflicts":"/api/acts/ad-sd3-60-30-stub-wing-and-outer-wing-strut-attachment-fittings/conflicts","importantCases":"/api/acts/ad-sd3-60-30-stub-wing-and-outer-wing-strut-attachment-fittings/important-cases","documents":"/api/acts/ad-sd3-60-30-stub-wing-and-outer-wing-strut-attachment-fittings/documents"}}