{"id":"F2006B06815","name":"AD/SD3-30/14 Amdt 1 - Electrical Power Line Contactor Bodies","slug":"ad-sd3-30-14-amdt-1-electrical-power-line-contactor-bodies","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114679,"registerId":"commonwealth-F2006B06815-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SD3-30/14 Amdt 1 - Electrical Power Line Contactor Bodies","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/SD3-30/14\n\nAmdt 1\n\n\nElectrical Power Line Contactor Bodies 11/86\n\n \n\nApplicability: All models SD3-30 according to Requirement Documents. Requirement: Modify in accordance with:\n\n1. Shorts Service Bulletin No. SD3-24-18.\n\n\n \n\n2.    Shorts Service Bulletin No. SD330-24-21.\n\n \n\nCompliance: For Para 1: Within 300 hours time in service after 31 March 1984.\n\n \n\nFor Para 2: Before 30 April 1987.\n\n \n\nBackground:  In service experience has shown that the bodies of the contactors require to be insulated.\n\n \n\nThis Directive is amended to include other contactors which require to be modified. These additional contactors are included in Para 2 of this Directive.\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 an amendment to an existing Airworthiness Directive, but it does not represent scope creep in the legislative sense. The amendment simply expands the technical requirements to cover additional contactor bodies (adding Paragraph 2) based on further in-service experience. The scope remains tightly focused on electrical safety modifications for the Short SD3-30 aircraft series."},"complexity_factors":["Very short document (approximately 250 words)","Only 2 defined compliance actions (the two Service Bulletins)","Simple conditional structure: applicability statement followed by requirement and compliance deadlines","No cross-references to other legislation or regulations beyond the parent Civil Aviation Regulations 1998","No nested exceptions or complex definitional sections","Straightforward temporal compliance requirements (specific dates/hours)"],"plain_english_summary":"**What this is:** An Airworthiness Directive (AD) — essentially a mandatory safety notice issued by Australia's Civil Aviation Safety Authority (CASA) for aircraft.\n\n**What it does:** This directive orders owners and operators of **Short SD3-30 series aeroplanes** (a type of regional turboprop aircraft) to modify the electrical power line contactor bodies. A \"contactor\" is an electrical switch that controls power flow, and \"contactor bodies\" are the physical housings of these switches. The modification involves insulating these bodies to prevent electrical problems.\n\n**Who must comply:** Anyone operating any model of the Short SD3-30 aircraft.\n\n**What must be done:**\n- **First modification:** Follow \"Shorts Service Bulletin No. SD3-24-18\" — must be done within 300 flight hours after 31 March 1984.\n- **Second modification:** Follow \"Shorts Service Bulletin No. SD330-24-21\" — must be done before 30 April 1987.\n\n**Why it matters:** In-service experience showed that these contactor bodies needed insulation to prevent safety issues. This amendment (Amendment 1) expands the original directive to cover additional contactors that also need modification.\n\n**The bottom line:** If you fly or maintain a Short SD3-30, you had to make these electrical modifications by specific deadlines to keep the aircraft airworthy."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"The Directive text explicitly states it has been amended to include additional contactors which require modification; those additional contactors are included in Para 2 (Amendment note). In short, the amendment expanded the set of contactors covered by the Directive by adding the items addressed in Service Bulletin SD330-24-21 (Requirement Para 2)."},"complexity_factors":["Relies on external technical documents (two Shorts Service Bulletins) for the detailed modification procedure rather than spelling out steps in the Directive.","Two separate requirement paragraphs with different compliance deadlines (300 hours after 31 March 1984 for Para 1; before 30 April 1987 for Para 2).","Scope language references 'Requirement Documents' and service bulletins, creating some ambiguity about exactly which serials/aircraft configurations are affected without consulting those documents (Applicability/Requirement).","Technical nature of work (insulating contactor bodies) implies need for specialised maintenance, parts and downtime.","Amendment expanded the set of affected contactors by adding additional items in Para 2, so implementers must track which contactors were covered originally versus newly added."],"plain_english_summary":"This AD requires operators of Short SD3‑30 aircraft to modify/insulate electrical power‑line contactor bodies exactly per two Shorts service bulletins, to address in‑service insulation failures. Work must be done within the Directive’s specified timeframes (300 flight hours after 31 Mar 1984 for the first bulletin; before 30 Apr 1987 for the amendment). Operators bear costs, must schedule certified maintenance, and consult the service bulletins for technical steps."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sd3-30-14-amdt-1-electrical-power-line-contactor-bodies","history":"/api/acts/ad-sd3-30-14-amdt-1-electrical-power-line-contactor-bodies/history","analysis":"/api/acts/ad-sd3-30-14-amdt-1-electrical-power-line-contactor-bodies/analysis","conflicts":"/api/acts/ad-sd3-30-14-amdt-1-electrical-power-line-contactor-bodies/conflicts","importantCases":"/api/acts/ad-sd3-30-14-amdt-1-electrical-power-line-contactor-bodies/important-cases","documents":"/api/acts/ad-sd3-30-14-amdt-1-electrical-power-line-contactor-bodies/documents"}}