{"id":"F2006B06821","name":"AD/SD3-30/2 - Fuselage Top Skin Sealing - Inspection","slug":"ad-sd3-30-2-fuselage-top-skin-sealing-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114685,"registerId":"commonwealth-F2006B06821-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SD3-30/2 - Fuselage Top Skin Sealing - 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)  Short SD3-30 Series Aeroplanes\n\n \n\nAD/SD3-30/2 Fuselage Top Skin Sealing - Inspection 11/81\n\nApplicability: All model SD3-30 with S/Nos. SH3002 to SH3072. Document:  Shorts SB No. SD3-53-41 Rev. 1.\n\nCompliance: Within 300 hours time in service after 30 November 1981 and thereafter at intervals not exceeding 2400 hours time in service.\n\n \n\nBackground:  Instances of fuel spillage entering the passenger compartment through joints in the top skin have been reported to the manufacturer.\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 manufacturing defect in a specific aircraft model. It has not expanded beyond its original purpose of ensuring fuselage sealing integrity."},"complexity_factors":["Single, specific aircraft type and limited serial number range (SH3002-SH3072)","Only one compliance action required (inspection per manufacturer's bulletin)","Simple time-based trigger (flight hours) with clear intervals","No nested exceptions, conditional logic, or cross-references to other legislation","Straightforward background explaining the safety risk","Total length is extremely short (under 200 words of substantive content)"],"plain_english_summary":"This is an **Airworthiness Directive** (a mandatory safety order) issued by Australia's Civil Aviation Safety Authority for a specific type of aircraft: the **Short SD3-30 Series** (a regional turboprop airliner, also known as the Short 330).\n\n**What it does:**\n- **Requires inspection** of the sealing on the top skin (outer surface) of the aircraft's fuselage (main body)\n- **Why:** Fuel has been leaking into the passenger cabin through joints in the top skin — a serious fire and safety hazard\n\n**Who must comply:**\n- Owners and operators of Short SD3-30 aircraft with **serial numbers SH3002 through SH3072**\n\n**What must be done:**\n- **First inspection:** Within 300 hours of flying time after 30 November 1981\n- **Repeat inspections:** Every 2,400 hours of flying time thereafter\n- **How:** Follow the manufacturer's Service Bulletin (Short SB No. SD3-53-41 Rev. 1)\n\n**Why it matters:**\nFuel leaking into the passenger compartment creates explosion and fire risks. This directive forces operators to check and maintain the sealing to prevent catastrophic accidents."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive’s scope—applying to SD3-30 aircraft S/Ns SH3002–SH3072 and requiring inspections at specified intervals—aligns with the stated problem in the Background (fuel spillage through top-skin joints). The instrument defines a narrow, prescriptive inspection obligation and references the manufacturer’s service bulletin for technical implementation, so there is no indication within the text that the scope departs from the stated purpose."},"complexity_factors":["Narrow applicability limited to SD3-30 aircraft with serial numbers SH3002–SH3072 (Applicability).","Single concrete compliance regime: initial inspection within 300 hours after a specific date, then recurring inspections at intervals not exceeding 2400 hours (Compliance).","Reliance on an external technical document (Shorts SB No. SD3-53-41 Rev. 1) for procedural details, shifting technical complexity to the service bulletin (Document).","Limited administrative discretion: the AD prescribes fixed timing and applicability, leaving few regulatory choices for operators (Applicability; Compliance).","Operational complexity resides in execution (maintenance labour, downtime, possible corrective work) rather than regulatory interpretation (Compliance; Document)."],"plain_english_summary":"This directive requires owners/operators of Shorts SD3-30 aeroplanes (S/Ns SH3002–SH3072) to inspect the fuselage top-skin sealing for potential fuel ingress, following Shorts Service Bulletin SD3-53-41 Rev.1. \n\nAn initial inspection is mandated within 300 hours TIS after 30 Nov 1981, with repeats at intervals not exceeding 2400 hours; operators bear the inspection and repair costs."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sd3-30-2-fuselage-top-skin-sealing-inspection","history":"/api/acts/ad-sd3-30-2-fuselage-top-skin-sealing-inspection/history","analysis":"/api/acts/ad-sd3-30-2-fuselage-top-skin-sealing-inspection/analysis","conflicts":"/api/acts/ad-sd3-30-2-fuselage-top-skin-sealing-inspection/conflicts","importantCases":"/api/acts/ad-sd3-30-2-fuselage-top-skin-sealing-inspection/important-cases","documents":"/api/acts/ad-sd3-30-2-fuselage-top-skin-sealing-inspection/documents"}}