{"id":"F2006B06825","name":"AD/SD3-30/24 - Nose Landing Gear Pins","slug":"ad-sd3-30-24-nose-landing-gear-pins","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114689,"registerId":"commonwealth-F2006B06825-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SD3-30/24 - Nose Landing Gear Pins","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/SD3-30/24 Nose Landing Gear Pins 2/89\n\nApplicability: All models with NLG Assemblies Part No 18001 Serial Nos 017 thru 097. Requirement:               Action in accordance with Menasco Service Bulletin No.32-69.\n\nNote: Shorts Service Bulletin SD 330-32-119 refers.\n\n \n\nCompliance: Prior to the accumulation of 30,000 landings.\n\n \n\nBackground: It has been found during fatigue testing that pins P/No 18109-3 and 18110-3 have a limited service life.\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":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive establishes a mandatory service action for a clearly defined subset of NLG assemblies (P/N 18001, S/N 017–097) and sets a life‑limit compliance point (30,000 landings). This aligns with the AD's stated purpose (fatigue test findings for pins P/No 18109-3 and 18110-3) and does not expand the scope beyond identifying affected assemblies and directing compliance with the specified service bulletin (Applicability, Requirement, Compliance, Background)."},"complexity_factors":["Narrow applicability defined by a specific part number and serial number range (Applicability)","Mandate to follow an external technical document (Menasco Service Bulletin No.32-69) rather than detailed steps in the AD itself (Requirement)","Fixed numerical compliance threshold (30,000 landings) requiring accurate operational recordkeeping (Compliance)","Technical basis limited to fatigue test findings about two pin part numbers, which leaves technical detail to the referenced service bulletins (Background, Requirement)","Reference to an additional manufacturer's service bulletin (Shorts SD 330-32-119) which may require cross‑consultation of multiple documents (Note)"],"plain_english_summary":"This AD requires operators of Short SD3‑30 aeroplanes with Nose Landing Gear assembly P/N 18001, S/N 017–097 to carry out the work specified in Menasco Service Bulletin No.32‑69 before that assembly reaches 30,000 landings. \n\nIt responds to fatigue testing showing limited life of pins P/N 18109‑3 and 18110‑3; aircraft owners/operators must schedule and fund the mandated maintenance to mitigate the failure risk."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow airworthiness directive targeting a specific mechanical defect in a specific aircraft type. It has not expanded beyond its original safety purpose."},"complexity_factors":["Extremely short document (approximately 150 words of substantive content)","Only 2 defined applicability criteria (part number and serial number range)","Single compliance requirement with clear numerical threshold (30,000 landings)","No cross-references to other legislation or regulations beyond a single service bulletin","No conditional logic, exceptions, or nested provisions","Straightforward cause-and-effect: fatigue testing → limited life → mandatory replacement"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** issued by Australia's Civil Aviation Safety Authority (CASA). It mandates safety maintenance for specific **Short SD3-30 series aircraft** (a type of regional turboprop plane).\n\n**What it does:**\n- Requires owners/operators to inspect or replace certain **nose landing gear pins** (parts numbered 18109-3 and 18110-3) before the aircraft completes 30,000 landings.\n- The pins are located in the nose landing gear assemblies with part number 18001 and serial numbers 017 through 097.\n\n**Why it matters:**\n- Fatigue testing revealed these pins have a **limited service life** — meaning they can crack or fail after repeated stress from landings.\n- A failed nose landing gear pin could cause the landing gear to collapse during landing, potentially causing serious damage, injury, or death.\n\n**Who must act:**\n- Anyone operating Short SD3-30 aircraft with the affected nose landing gear assemblies.\n- Compliance is mandatory — operators must follow the procedures in **Menasco Service Bulletin No. 32-69** (the manufacturer's official repair instructions).\n\n**Key deadline:**\n- The work must be done **before the aircraft reaches 30,000 total landings**."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sd3-30-24-nose-landing-gear-pins","history":"/api/acts/ad-sd3-30-24-nose-landing-gear-pins/history","analysis":"/api/acts/ad-sd3-30-24-nose-landing-gear-pins/analysis","conflicts":"/api/acts/ad-sd3-30-24-nose-landing-gear-pins/conflicts","importantCases":"/api/acts/ad-sd3-30-24-nose-landing-gear-pins/important-cases","documents":"/api/acts/ad-sd3-30-24-nose-landing-gear-pins/documents"}}