{"id":"F2006B08766","name":"AD/DAUPHIN/54 - Fuselage 9 Degree Frame Reinforced Latch Support","slug":"ad-dauphin-54-fuselage-9-degree-frame-reinforced-latch-support","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52047,"registerId":"commonwealth-F2006B08766-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DAUPHIN/54 - Fuselage 9 Degree Frame Reinforced Latch Support","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)  \n\nAIRWORTHINESS DIRECTIVE\n\n![](image.001.png)\n\n![](image.001.png)  \nFor the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.\n\nEurocopter SA 360 & SA 365 Series Helicopters\n\nAD/DAUPHIN/54 Fuselage 9 Degree Frame Reinforced Latch\n\nSupport\n\n  \n7/2001\n\nDM\n\nApplicability: AS 365 helicopters, versions N, N1, N2, and N3 that have been modified in accordance with MOD 0753B31 or have Eurocopter AS 365 N Service Bulletin No.\n\n53.00.20 incorporated.\n\nHelicopters delivered from 15 October 2000 are not affected by this Directive.\n\nRequirement: Action in accordance with Eurocopter AS 365 N Alert Service Bulletin No. 53.00.42.\n\nNote: DGAC AD 2001-060-052(A) refers.\n\nCompliance: Within 50 flight hours after 30 May 2001, unless already accomplished.\n\nThereafter accomplish repetitive inspections as specified in the Requirement document until a flange reinforcement plate is installed in accordance with paragraph\n\n2.B.2 of the Requirement document, or a repair is accomplished in accordance with paragraph 2.B.3 of the Requirement document.\n\nThis Airworthiness Directive becomes effective on 30 May 2001.\n\nBackground: The DGAC requires inspections and other actions following the discovery of a crack in the left side of the fuselage 9 degree frame.\n\n![Signature of David Alan Villiers Delegate of the Civil Aviation Safety Authority](image.002.png)  \n\nDavid Alan Villiers\n\nDelegate of the Civil Aviation Safety Authority 23 May 2001\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 30 May 2001.\n\n  \nPage 1 of 1","sortOrder":0}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope: addressing a specific structural defect in a specific helicopter model series. It does not expand beyond the original safety purpose of correcting the cracked fuselage frame issue."},"complexity_factors":["Short, single-page document with clear structure (Applicability, Requirement, Compliance, Background)","Only 4 defined/model variants in applicability section (N, N1, N2, N3)","Single cross-reference to French aviation authority (DGAC AD 2001-060-052(A)) and one Eurocopter service bulletin","Conditional logic limited to: (a) specific modification history, (b) delivery date exclusion, and (c) repetitive inspection until repair completed","No nested exceptions or complex definitional sections","Technical content refers to external engineering documents (service bulletin) rather than spelling out detailed procedures in the AD itself"],"plain_english_summary":"This safety order requires urgent inspections and corrective action on the 9‑degree fuselage frame of certain Eurocopter AS 365 Dauphin N/N1/N2/N3 helicopters modified by MOD 0753B31 or with a specific service bulletin, to detect and repair cracking that could cause in‑flight structural failure. It affects operators and owners of those modified aircraft (excluding helicopters delivered from 15 Oct 2000 onward) and sets short mandatory deadlines for inspections and repeated checks until permanent repair."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The Directive confines requirements to specific AS 365 variants and modification states and prescribes inspections/repairs responding to a discovered crack. The text does not expand the universe of affected aircraft or add obligations beyond the stated inspections, reinforcement or repair criteria."},"complexity_factors":["Technical specificity: targets a structural component (fuselage 9° frame) requiring inspection and repair.","Cross-references to manufacturer documents: requires compliance with Eurocopter AS 365 N Alert Service Bulletin No. 53.00.42 and paragraphs 2.B.2/2.B.3 of that document.","Conditional applicability: only applies to AS 365 versions N/N1/N2/N3 modified by MOD 0753B31 or incorporating Service Bulletin 53.00.20; helicopters delivered from 15 October 2000 are excluded.","Time-critical compliance: a fixed short window (within 50 flight hours after 30 May 2001) for initial action.","Repetitive requirement: ongoing inspections until modification (flange reinforcement plate) or an approved repair is completed.","Regulatory references: issued under CAR 1998 subregulation 39.1(1) and notes DGAC AD cross-reference."],"plain_english_summary":"This Airworthiness Directive orders operators of specified Eurocopter AS 365 helicopters (versions N, N1, N2, N3) modified by MOD 0753B31 or incorporating Service Bulletin 53.00.20 to inspect and correct the fuselage 9° frame latch support after a crack was found. Helicopters delivered from 15 October 2000 are excluded.\n\nCASA requires inspections within 50 flight hours of 30 May 2001 and repeated inspections until a reinforcement plate is fitted or an approved repair is done; operators must pay for inspections and repairs."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dauphin-54-fuselage-9-degree-frame-reinforced-latch-support","history":"/api/acts/ad-dauphin-54-fuselage-9-degree-frame-reinforced-latch-support/history","analysis":"/api/acts/ad-dauphin-54-fuselage-9-degree-frame-reinforced-latch-support/analysis","conflicts":"/api/acts/ad-dauphin-54-fuselage-9-degree-frame-reinforced-latch-support/conflicts","importantCases":"/api/acts/ad-dauphin-54-fuselage-9-degree-frame-reinforced-latch-support/important-cases","documents":"/api/acts/ad-dauphin-54-fuselage-9-degree-frame-reinforced-latch-support/documents"}}