{"id":"F2006B06131","name":"AD/PC-6/28 Amdt 1 - Wing Strut Attachment - Inspection","slug":"ad-pc-6-28-amdt-1-wing-strut-attachment-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":46909,"registerId":"commonwealth-F2006B06131-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PC-6/28 Amdt 1 - Wing Strut Attachment - Inspection","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)  Pilatus Porter PC-6 Series Aeroplanes\n\n \n\nAD/PC-6/28\n\nAmdt 1\n\n\nWing Strut Attachment - Inspection 12/80\n\n \n\nApplicability: All models with S/Nos. 338 to 701. Document:  Pilatus SB No. 93.\n\nCompliance: At intervals not exceeding 100 hours time in service.\n\n \n\nBackground:  Service experience indicates that the inspection for corrosion in the wing strut attachment can be extended to 100 hourly intervals.\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 narrow, technical maintenance instruction that has remained focused on its original purpose — ensuring safe wing strut attachment inspection intervals for specific PC-6 aircraft. Amendment 1 simply relaxed the inspection frequency based on operational experience, without expanding the scope to other aircraft systems or models."},"complexity_factors":["Extremely short document — approximately 150 words total","Only one substantive requirement (inspection interval)","Single applicability criterion (serial number range)","No defined terms section","No cross-references to other legislation beyond the parent Civil Aviation Regulations 1998","Simple conditional structure: if aircraft in serial range, then inspect every 100 hours","No exceptions, exemptions, or nested conditions"],"plain_english_summary":"This is an **Airworthiness Directive** (a mandatory safety instruction) for owners and operators of **Pilatus Porter PC-6 aircraft** — a type of small utility plane often used for skydiving, cargo, and remote area work.\n\n**What it does:**\n- Requires regular **inspections of the wing strut attachment points** — the metal fittings where the wing supports connect to the fuselage\n- Sets the maximum time between inspections at **100 hours of flight time** (\"time in service\")\n\n**Who it affects:**\n- All Pilatus PC-6 models with **serial numbers 338 to 701**\n- Aircraft operators, maintenance engineers, and owners\n\n**Why it matters:**\n- These attachment points can develop **corrosion** (rust and deterioration) over time\n- If corrosion weakens these fittings, the wing strut could fail — potentially causing catastrophic structural failure in flight\n- This directive extends the previous inspection interval based on real-world service experience, showing the parts are holding up better than initially expected\n\n**Key details:**\n- **Compliance:** Must be done every 100 hours the aircraft is flown\n- **Reference:** Follows Pilatus Service Bulletin No. 93 (the manufacturer's official guidance)\n- **Background:** Originally issued in December 1980 (hence \"12/80\"), this Amendment 1 updates the inspection frequency"},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":true,"description":"The AD amends the inspection interval by specifying that the wing strut attachment inspection for corrosion may be carried out at intervals not exceeding 100 hours time in service. The Background states this represents an extension based on service experience. Mechanically, this changes the frequency requirement that affected operators must follow (Background; Compliance)."},"complexity_factors":["Single, narrowly defined mandatory action: one periodic inspection requirement (Compliance).","Narrow applicability limited to Pilatus PC-6 S/N 338–701 (Applicability), reducing scope complexity.","Relies on an external technical document (Pilatus SB No. 93) for inspection procedure—details are not in the AD text (Document reference).","Short text: no multiple conditional provisions, exceptions, or alternative compliance pathways stated.","Regulatory context provided (Civil Aviation Regulations 1998, Part 39), but enforcement and procedural details are not included in the AD text (header), leaving operational specifics to the SB or existing regulatory practice."],"plain_english_summary":"This AD requires owners/operators of Pilatus Porter PC‑6 aeroplanes (S/N 338–701) to inspect the wing strut attachment at intervals not exceeding 100 hours TIS, using the procedure in Pilatus Service Bulletin No. 93. It affects aircraft operators and maintenance organisations, shifts maintenance cadence to a 100‑hour inspection cycle, and leaves compliance costs to owners."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pc-6-28-amdt-1-wing-strut-attachment-inspection","history":"/api/acts/ad-pc-6-28-amdt-1-wing-strut-attachment-inspection/history","analysis":"/api/acts/ad-pc-6-28-amdt-1-wing-strut-attachment-inspection/analysis","conflicts":"/api/acts/ad-pc-6-28-amdt-1-wing-strut-attachment-inspection/conflicts","importantCases":"/api/acts/ad-pc-6-28-amdt-1-wing-strut-attachment-inspection/important-cases","documents":"/api/acts/ad-pc-6-28-amdt-1-wing-strut-attachment-inspection/documents"}}