{"id":"F2006B08750","name":"AD/DAUPHIN/39 Amdt 1 - Attachment of Outboard Fins","slug":"ad-dauphin-39-amdt-1-attachment-of-outboard-fins","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52014,"registerId":"commonwealth-F2006B08750-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DAUPHIN/39 Amdt 1 - Attachment of Outboard Fins","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nEurocopter SA 360 and SA 365 (Dauphin) Series Helicopters\n\nAD/DAUPHIN/39\n\nAmdt 1\n\n  \nAttachment of Outboard Fins 3/97\n\nApplicability: Models 365N, N1 and N2 fitted with outboard fins that are secured with studs P/n 365A13-3017-24, on which Mod 365A07-55B08 has not been embodied.\n\nRequirement: Action in accordance with Eurocopter SB SA365 01.40 R1.\n\nNote: DGAC AD 94-076-036(B)R1 refers.\n\nCompliance: Unless already accomplished in accordance with the previous issue of this Directive, before further flight after 27 February 1997.\n\nThis Amendment has effect from 27 February 1997.\n\nBackground: Following the loss of an outboard fin, other aircraft were found to have loose fin attaching studs.\n\nAmendment 1 reflects the latest revisions of the Requirement document, and the DGAC AD, it also revises the Applicability to exclude aircraft at a particular mod state.\n\nThe original issue of this Airworthiness Directive became effective on 20 April 1994.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Amendment 1 narrows and updates the directive's scope by excluding aircraft that have Mod 365A07-55B08 embodied and by reflecting the latest revisions of the Eurocopter Service Bulletin and the DGAC AD. (See 'Applicability' and 'Amendment 1 reflects...' lines.)"},"complexity_factors":["Technical specificity: applies only to certain models and a particular stud part number (Applicability).","Mod-state exclusion: aircraft with Mod 365A07-55B08 are excluded (Applicability).","External documents required: compliance depends on Eurocopter SB SA365 01.40 R1 and referenced DGAC AD (Requirement; Note).","Immediate operational deadline: must be done before further flight after a set date (Compliance).","Regulatory amendment: this is an amendment updating the Requirement and Applicability (Amendment 1; Background)."],"plain_english_summary":"**This Airworthiness Directive** requires operators of Eurocopter SA 365N, N1 and N2 helicopters fitted with outboard fins secured by studs P/n 365A13-3017-24 (unless Mod 365A07-55B08 is embodied) to carry out the inspection/repair actions set out in Eurocopter Service Bulletin SA365 01.40 R1. It must be done before further flight after 27 February 1997 because a fin was lost and loose attaching studs were found."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment remains tightly focused on its original purpose: preventing outboard fin detachment on specific Dauphin helicopter models. Amendment 1 merely updates referenced documents and narrows applicability to exclude aircraft already modified, without expanding the directive's scope beyond the original safety issue."},"complexity_factors":["Single specific technical requirement referencing external manufacturer document (Eurocopter Service Bulletin)","Narrow applicability criteria involving three model variants, specific part numbers, and exclusion of one modification state","Cross-reference to French aviation authority directive (DGAC AD 94-076-036(B)R1)","Conditional compliance deadline with exception for previously completed work","Amendment structure requires understanding of 'previous issue' and original effective date context"],"plain_english_summary":"This is a **safety order for specific helicopters** that fixes a dangerous design flaw.\n\n**What it does:**\nOrders owners and operators of certain Eurocopter Dauphin helicopters (models 365N, N1, and N2) to inspect and repair how the outboard fins are attached to the aircraft. The fins were found to be at risk of falling off because the attaching studs could come loose.\n\n**Who it affects:**\n- Owners and operators of Eurocopter SA 360 and SA 365 series helicopters\n- Specifically those with outboard fins secured by part number 365A13-3017-24 studs\n- Only applies if the helicopter hasn't already had a specific modification (Mod 365A07-55B08) installed\n\n**What must be done:**\nFollow the repair instructions in Eurocopter Service Bulletin SA365 01.40 R1 (a manufacturer's technical notice).\n\n**When:**\nBefore flying the helicopter again after 27 February 1997 (unless already fixed under the earlier version).\n\n**Why it matters:**\nAn outboard fin already fell off one helicopter, which could cause loss of control or crash. This order prevents that happening again by forcing immediate inspection and repair."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dauphin-39-amdt-1-attachment-of-outboard-fins","history":"/api/acts/ad-dauphin-39-amdt-1-attachment-of-outboard-fins/history","analysis":"/api/acts/ad-dauphin-39-amdt-1-attachment-of-outboard-fins/analysis","conflicts":"/api/acts/ad-dauphin-39-amdt-1-attachment-of-outboard-fins/conflicts","importantCases":"/api/acts/ad-dauphin-39-amdt-1-attachment-of-outboard-fins/important-cases","documents":"/api/acts/ad-dauphin-39-amdt-1-attachment-of-outboard-fins/documents"}}