{"id":"F2006B06864","name":"AD/SD3-60/20 Amdt 1 - Electrical Power - Contactor Body","slug":"ad-sd3-60-20-amdt-1-electrical-power-contactor-body","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114742,"registerId":"commonwealth-F2006B06864-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SD3-60/20 Amdt 1 - Electrical Power - Contactor Body","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\nAD/SD3-60/20\n\nAmdt 1\n\n\nElectrical Power - Contactor Body 2/87\n\n \n\nApplicability: All model SD3-60 Aircraft with S/Nos SH 3601 through SH 3695.\n\n \n\nRequirement: Modify the electrical power contactors according to the requirements of Shorts S.B. SD360-24-06 Revision 1.\n\n \n\nNote: The United Kingdom CAA has classified this service bulletin as mandatory.\n\n \n\nCompliance: Before 30 April 1987.\n\n \n\nBackground: 1. In service experience has shown that the bodies of the contactors require to be insulated.\n\n \n\n2. This Directive has been amended to reflect the manufacturers revised torque procedure reference.\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 standard, narrow airworthiness directive focused on a specific technical modification to a specific aircraft type. The amendment simply updates a procedural reference (torque specification) without expanding the scope beyond the original electrical safety issue."},"complexity_factors":["Very short document (under 300 words)","Only 1 defined applicability criterion (serial number range)","Single, clear compliance requirement referencing an external technical standard (Service Bulletin)","No nested exceptions or conditional logic","Minimal cross-referencing (only to the external Service Bulletin)","Straightforward compliance deadline"],"plain_english_summary":"This is an **Airworthiness Directive** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for specific aircraft.\n\n**What it does:**\nOrders owners and operators of certain **Short SD3-60 series aeroplanes** (a type of small regional aircraft, also known as the Short 360) to carry out a specific electrical modification.\n\n**Who it affects:**\nAll SD3-60 aircraft with serial numbers SH 3601 through SH 3695 — that's 95 specific planes.\n\n**What must be done:**\nThe electrical power contactors (electrical switches that control power distribution) must be modified according to **Shorts Service Bulletin SD360-24-06 Revision 1**. The key change is adding insulation to the contactor bodies to prevent electrical problems.\n\n**Why it matters:**\nIn-service experience showed that without this insulation, the contactor bodies could cause safety issues. The UK aviation regulator (CAA) has classified this fix as mandatory, and Australia is adopting the same requirement.\n\n**Deadline:**\nThe modification had to be completed before **30 April 1987**.\n\n**Note:** This is Amendment 1, which simply updates the reference to the manufacturer's revised torque procedure (how tight to make the bolts)."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The amendment updates the manufacturer's torque procedure reference (Background 2) but does not change the applicability (serial-number range) or the core requirement to modify electrical power contactors per Shorts S.B. SD360-24-06 Revision 1 (Applicability; Requirement)."},"complexity_factors":["Narrow applicability limited to a specific aircraft model and serial-number range (Applicability).","Single, well-defined technical requirement referencing one manufacturer's service bulletin (Requirement).","Fixed compliance deadline (Compliance).","Dependence on an external technical document (Shorts S.B. SD360-24-06 Revision 1) and a revised torque procedure reference (Background 2).","No additional regulatory exceptions, alternative compliance paths, or detailed procedural rules included in the text supplied."],"plain_english_summary":"This directive mandates that owners/operators of Short SD3‑60 aircraft (serials SH3601–SH3695) modify electrical power contactor bodies per Shorts Service Bulletin SD360‑24‑06 Rev 1 to insulate them, addressing in‑service insulation issues. Work must be completed by 30 April 1987. It’s issued under the Commonwealth/CASA framework, depends on the referenced service bulletin and updated torque procedure, and places responsibility for arranging and funding compliance on the operators."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sd3-60-20-amdt-1-electrical-power-contactor-body","history":"/api/acts/ad-sd3-60-20-amdt-1-electrical-power-contactor-body/history","analysis":"/api/acts/ad-sd3-60-20-amdt-1-electrical-power-contactor-body/analysis","conflicts":"/api/acts/ad-sd3-60-20-amdt-1-electrical-power-contactor-body/conflicts","importantCases":"/api/acts/ad-sd3-60-20-amdt-1-electrical-power-contactor-body/important-cases","documents":"/api/acts/ad-sd3-60-20-amdt-1-electrical-power-contactor-body/documents"}}