{"id":"F2006B06906","name":"AD/SD3-60/6 - Oil Cooler Left Air Intake Scoop - Modification","slug":"ad-sd3-60-6-oil-cooler-left-air-intake-scoop-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114786,"registerId":"commonwealth-F2006B06906-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SD3-60/6 - Oil Cooler Left Air Intake Scoop - Modification","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/SD3-60/6 Oil Cooler Left Air Intake Scoop - Modification 6/84\n\nApplicability: All model SD3-60 with S/Nos SH 3601 to SH 3629, SH 3631 and SH 3632. Document:               Shorts SB SD360-71-05.\n\nCompliance: Modify prior to 30 November 1984.\n\n \n\nBackground:  The manufacture reports that high oil temperature readings have been recorded while operating in severe icing conditions.\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\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive focused on one specific mechanical modification for one aircraft type. It has not expanded beyond its original narrow safety purpose."},"complexity_factors":["Extremely short document (approximately 150 words)","Only 3 defined elements: applicability (specific serial numbers), document reference, and compliance deadline","No cross-references to other legislation or regulations beyond the parent Civil Aviation Regulations 1998","Single, unambiguous action required with clear deadline","No conditional logic, exceptions, or nested provisions","Straightforward cause-and-effect: identified safety problem → mandatory fix → deadline"],"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 SD3-60 Series** (a small regional turboprop plane, also known as the Short 360).\n\n**What it requires:**\n- **Who must comply:** Owners and operators of specific Short SD3-60 aircraft with serial numbers SH 3601 to SH 3629, SH 3631 and SH 3632\n- **What must be done:** Modify the **left air intake scoop for the oil cooler** (a component that helps cool the engine oil)\n- **When:** Before 30 November 1984\n- **How:** Follow the manufacturer's Service Bulletin (Shorts SB SD360-71-05)\n\n**Why it matters:**\nThe manufacturer reported that these aircraft were experiencing **dangerously high oil temperatures when flying in severe icing conditions**. This modification fixes a design flaw that could lead to engine failure or other serious safety problems in cold, icy weather.\n\n**In short:** If you owned one of these specific planes in 1984, you legally had to get this modification done to prevent your engine oil from overheating in icy conditions."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive’s scope is limited and specific in the source text: it applies only to the listed SD3-60 serial numbers and requires the single modification specified by the manufacturer’s service bulletin. There is no indication in the provided text that the scope has been expanded or altered from the original stated requirement (Applicability; Document; Compliance)."},"complexity_factors":["Narrow applicability to a clearly enumerated set of serial numbers (SH 3601–SH 3629, SH 3631, SH 3632) [Applicability]","Single, prescriptive technical action (modify the left oil-cooler air intake scoop) with a manufacturer’s service bulletin as the method [Document]","Clear compliance deadline specified (prior to 30 November 1984) rather than phased or conditional requirements [Compliance]","Technical execution requires maintenance capability and parts, creating operational downtime and potential logistics complexity for individual operators (maintenance/parts availability)","Regulatory enforcement rests on the Civil Aviation Safety Authority under Part 39, but the directive itself is administratively straightforward"],"plain_english_summary":"This directive requires owners/operators of specified Shorts SD3-60 aeroplanes (serials SH3601–SH3629, SH3631–SH3632) to modify the left oil‑cooler air intake scoop per the manufacturer’s service bulletin to address reported high engine oil temperatures in severe icing.  \n\nOperators must arrange and pay for the work, complete it by 30 November 1984, and may use approved maintenance organisations; the measure preserves safety but temporarily reduces aircraft availability and imposes direct compliance costs."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sd3-60-6-oil-cooler-left-air-intake-scoop-modification","history":"/api/acts/ad-sd3-60-6-oil-cooler-left-air-intake-scoop-modification/history","analysis":"/api/acts/ad-sd3-60-6-oil-cooler-left-air-intake-scoop-modification/analysis","conflicts":"/api/acts/ad-sd3-60-6-oil-cooler-left-air-intake-scoop-modification/conflicts","importantCases":"/api/acts/ad-sd3-60-6-oil-cooler-left-air-intake-scoop-modification/important-cases","documents":"/api/acts/ad-sd3-60-6-oil-cooler-left-air-intake-scoop-modification/documents"}}