{"id":"F2006B06890","name":"AD/SD3-60/44 - Strobe Lighting","slug":"ad-sd3-60-44-strobe-lighting","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114770,"registerId":"commonwealth-F2006B06890-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SD3-60/44 - Strobe Lighting","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/SD3-60/44 Strobe Lighting 1/97\n\nApplicability: This Directive is applicable to all SD3-60-200 variant aeroplanes.\n\n \n\nRequirement: Incorporate Modification No A8651 (Introduction of New Strobe Light and Power Supply with Associated Hardware) in accordance with Shorts Service Bulletin SD360-33-25 Revision 1 dated July 1996.\n\n \n\nNote: CAA(UK) AD 007-05-96 refers.\n\n \n\nCompliance: Prior to 31 March 1997.\n\n \n\nBackground: The CAA(UK) has advised that the existing tail strobe light does not meet the certification requirements regarding minimum intensity. Action specified by this Directive rectifies this deficiency.\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, time-bound safety directive with a single purpose: remedying a specific certification deficiency in strobe lighting intensity. It has not expanded beyond its original technical scope."},"complexity_factors":["Single, unambiguous requirement (one specific modification)","No defined terms section — all technical references point to external documents (Service Bulletin, UK AD)","No conditional logic or exceptions","No cross-references to other Australian legislation","Extremely short (under 200 words of substantive content)","Single applicability criterion (SD3-60-200 variant only)"],"plain_english_summary":"**What this is:** This is an Airworthiness Directive (AD) — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for a specific type of aircraft.\n\n**Who it affects:** Owners and operators of **Short SD3-60-200 series aeroplanes** (a British-built regional turboprop aircraft, also known as the Short 360).\n\n**What it requires:** Aircraft operators must install a specific modification (**Modification No A8651**) that replaces the existing tail strobe light and its power supply with new hardware. This must be done following the technical instructions in **Shorts Service Bulletin SD360-33-25 Revision 1** (dated July 1996).\n\n**Why it matters:** The UK's Civil Aviation Authority discovered that the original tail strobe light on these aircraft wasn't bright enough to meet safety certification standards. Strobe lights make aircraft visible to other planes, especially in poor weather or at night — so an underpowered light creates a collision risk. This directive fixes that safety defect.\n\n**Deadline:** The modification had to be completed before **31 March 1997**.\n\n**Key point:** This is a **compliance document**, not a law you negotiate. If you operate this aircraft type in Australia, you legally had to make this change by the deadline or ground the aircraft."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument sets a corrective technical requirement limited to SD3-60-200 aeroplanes to fit a specified modification to the tail strobe system and imposes a compliance deadline. It does not expand the universe of affected aircraft or create ongoing regulatory obligations beyond completing the specified modification; it therefore does not change scope from its stated corrective intent (Requirement; Applicability; Compliance; Background)."},"complexity_factors":["Single, narrow technical requirement (one modification: A8651) reduces legal complexity (Requirement).","Clear, short compliance deadline creates operational scheduling pressure but not legal ambiguity (Compliance).","Direct reference to a single manufacturer service bulletin specifies technical steps, limiting discretion but requiring access to technical documents (Requirement).","Applicability limited to a single aircraft variant (SD3-60-200), limiting scope and affected parties (Applicability).","Cross-reference to an overseas AD (CAA(UK) AD 007-05-96) introduces minor interpretive context but does not expand the mandatory action (Note)."],"plain_english_summary":"All Short SD3-60-200 aircraft must have Modification A8651 — a new tail strobe, power supply and associated hardware installed per Shorts Service Bulletin SD360-33-25 Rev 1 — by 31 March 1997. Owners/operators must fund and schedule the work; maintenance organisations must follow the bulletin. The mandate responds to CAA(UK) advice that the existing strobe fails minimum-intensity certification."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sd3-60-44-strobe-lighting","history":"/api/acts/ad-sd3-60-44-strobe-lighting/history","analysis":"/api/acts/ad-sd3-60-44-strobe-lighting/analysis","conflicts":"/api/acts/ad-sd3-60-44-strobe-lighting/conflicts","importantCases":"/api/acts/ad-sd3-60-44-strobe-lighting/important-cases","documents":"/api/acts/ad-sd3-60-44-strobe-lighting/documents"}}