{"id":"F2006B08735","name":"AD/DAUPHIN/24 Amdt 1 - Rotating Swashplate Bearing","slug":"ad-dauphin-24-amdt-1-rotating-swashplate-bearing","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":51971,"registerId":"commonwealth-F2006B08735-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DAUPHIN/24 Amdt 1 - Rotating Swashplate Bearing","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/24\n\nAmdt 1\n\n  \nRotating Swashplate Bearing 11/91\n\nApplicability: All model SA 360 & 365 series helicopter on which swashplate bearing P/Nos.\n\n704A33.651.009, 704A33.651.051, 704A33.651.080 or 704A33.651.126 is fitted.\n\nRequirement: Action in accordance with Aerospatiale SB 65.21 Rev. 1 or 62.07 Rev. 1 as applicable.\n\nNote: DGAC AD 91-007-031 (B) refers to initial issue of SB65.21.\n\nCompliance: As directed in the Requirement Document with a revised effective date of 14 November 1991. This inspection may be carried out by the pilot in command in which case the precise AD reference shall be entered in a Certification made on the Maintenance Release together with any defects found during the inspection.\n\nBackground: Due to seizure of the swashplate bearing an AS 350 helicopter accident has occurred.\n\nAs both swashplates are of the same design, the manufacturer has extended the inspection requirements to the Dauphin helicopter. This revision adds bearing P/No and “N” model series to this Directive.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"This amendment expanded the directive’s scope by adding specific bearing part numbers and the “N” model series to the applicability, extending inspection requirements from the AS 350 design to Dauphin helicopters (Background)."},"complexity_factors":["Narrow technical applicability to specific helicopter models and specific bearing part numbers (Applicability).","Relies on external service documents for required actions (Requirement: Aerospatiale SB 65.21 Rev.1 or 62.07 Rev.1).","Statutory compliance deadline set by the AD (Compliance: revised effective date 14 November 1991).","Allows pilot-in-command to perform inspection but requires formal Maintenance Release entry (Compliance — affects who may perform work and recordkeeping).","Regulatory amendment broadens original scope to add part numbers and model variants (Background: revision adds bearing P/No and “N” model series).","Safety-driven origin (Background: incident of bearing seizure on AS 350) creates urgency but limited procedural complexity."],"plain_english_summary":"Requires inspection and corrective action of specified rotating swashplate bearings (P/Ns 704A33.651.009, .051, .080, .126) on Eurocopter SA 360 and SA 365 helicopters, carried out in accordance with Aerospatiale Service Bulletins 65.21 Rev.1 or 62.07 Rev.1 (Requirement). Owners/operators must comply by the revised effective date of 14 November 1991; the pilot-in-command may perform the inspection and must record the AD reference and any defects on the Maintenance Release (Compliance)."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment (Amdt 1) slightly expands the original directive by adding one additional bearing part number and the 'N' model series to the applicability list. This represents a minor technical expansion consistent with the original safety purpose—preventing swashplate bearing seizures—rather than a fundamental scope creep. The core purpose (addressing a known design flaw that caused a fatal accident) remains unchanged."},"complexity_factors":["Single, specific mechanical component targeted (swashplate bearing)","Only 4 part numbers specified in applicability","Clear cross-reference to manufacturer service bulletins for technical details","Simple compliance structure: one deadline (14 November 1991)","Minimal conditional logic—applies to all specified models without exceptions","Short document (approximately 150 words excluding header)","Only one defined term implicitly used (Maintenance Release, which is standard aviation terminology)"],"plain_english_summary":"This safety directive orders owners/operators of Eurocopter SA 360/SA 365 (Dauphin) helicopters fitted with certain rotating swashplate bearings to inspect or replace those bearings per the manufacturer's service bulletins, with compliance by 14 November 1991. It responds to a crash caused by a seized swashplate bearing and the discovery of the same design flaw in Dauphins.\n\nUnusually, pilots may perform the inspection but must record the AD/DAUPHIN/24 reference on the Maintenance Release and log any defects."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dauphin-24-amdt-1-rotating-swashplate-bearing","history":"/api/acts/ad-dauphin-24-amdt-1-rotating-swashplate-bearing/history","analysis":"/api/acts/ad-dauphin-24-amdt-1-rotating-swashplate-bearing/analysis","conflicts":"/api/acts/ad-dauphin-24-amdt-1-rotating-swashplate-bearing/conflicts","importantCases":"/api/acts/ad-dauphin-24-amdt-1-rotating-swashplate-bearing/important-cases","documents":"/api/acts/ad-dauphin-24-amdt-1-rotating-swashplate-bearing/documents"}}