{"id":"F2006B08746","name":"AD/DAUPHIN/35 Amdt 3 - Tail Rotor Kevlar Tie Bar","slug":"ad-dauphin-35-amdt-3-tail-rotor-kevlar-tie-bar","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52006,"registerId":"commonwealth-F2006B08746-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DAUPHIN/35 Amdt 3 - Tail Rotor Kevlar Tie Bar","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/35\n\nAmdt 3\n\n  \nTail Rotor Kevlar Tie Bar 3/97\n\nApplicability: Models 365 N1 and 365 N2 fitted with tail rotor blades P/Nos.: 365A12.0010 all dash numbers\n\n365A12.0020.00\n\n365A33.2131 all dash numbers 365A12.0020.02\n\nRequirement: Action in accordance with Eurocopter SA 365 S.B.05.34. Rev 3.\n\nNote: DGAC AD 92-185-033(B)R4 refers.\n\nCompliance: Unless already accomplished, within 250 hours time in service after 15 September 1994 and thereafter at intervals not exceeding 250 hours time in service.\n\nThe instructions titled: VERY IMPORTANT, regarding the operation of the rudder pedals, are to be complied with forthwith.\n\nThe Compliance of the previous issue has not been altered and this Amendment has effect from 27 February 1997.\n\nBackground: There has been an accident overseas during the approach phase that resulted in a fatality, and injuries to personnel.\n\nAmendment 1 included another part number into the Applicability.\n\nAmendment 2 reflected the latest issues of the DGAC AD and the Requirement document.\n\nAmendment 3 is to reflect the latest issues of the Requirement document and the DGAC AD.\n\nAmendment 2 of this Airworthiness Directive became effective on 30 March 1995.\n\nAmendment 1 of this Airworthiness Directive became effective on 15 September 1994.\n\nThe original issue of this Airworthiness Directive became effective on 28 December 1992.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":true,"description":"The original 1992 directive has expanded through three amendments. Amendment 1 added additional part numbers to the applicability (broadening which helicopters are covered). Amendments 2 and 3 updated the technical requirements to reflect revised manufacturer service bulletins and French aviation authority directives. While still focused on the same safety issue (tail rotor tie bar), the scope of affected aircraft and the specific technical requirements have evolved significantly from the original instrument."},"complexity_factors":["Short, single-purpose instrument (approximately 250 words)","Only 4 defined part numbers in applicability section","Single primary requirement referencing external technical document (Eurocopter S.B.05.34 Rev 3)","Simple compliance structure: one-time action + recurring interval (250 hours)","No nested exceptions or conditional logic — applies straightforwardly to listed models","Historical amendment notes add length but don't create operational complexity","Cross-reference to one foreign aviation authority document (DGAC AD 92-185-033(B)R4)"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspection or replacement of the tail-rotor Kevlar tie bar on certain Eurocopter Dauphin 365 N1/N2 helicopters per Eurocopter Service Bulletin 05.34 (Rev 3). It targets operators using specified part-numbered tail rotor blades and includes an immediate “VERY IMPORTANT” rudder-pedal procedure.\n\nIssued after a fatal overseas accident, the AD requires initial action within 250 flight hours from 15 Sept 1994 and repeat inspections every 250 hours to prevent catastrophic failure."},"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"},"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":true,"description":"The directive's scope was expanded from the original 1992 issue by Amendment 1 which added an additional tail-rotor blade part number to Applicability, and Amendments 2 and 3 updated the Requirement document and the referenced DGAC AD. The core compliance interval remained at 250 hours, but the applicability and governing reference documents were broadened/updated (see 'Amendment 1 included another part number into the Applicability' and notes on Amendments 2–3)."},"complexity_factors":["Cross-references to external normative documents: Eurocopter SA 365 S.B.05.34 Rev 3 (Requirement) and DGAC AD 92-185-033(B)R4 (Note), increasing reliance on non‑statutory material.","Specific applicability limited to Models 365 N1 and 365 N2 fitted with multiple listed tail-rotor blade P/Ns (listing several part numbers), requiring precise parts tracing.","Fixed recurring compliance interval: initial compliance within 250 hours after 15 September 1994 and thereafter every 250 hours (Compliance), creating ongoing maintenance scheduling and recordkeeping burdens.","Immediate operational instruction: separate, urgent requirement to follow the instructions titled 'VERY IMPORTANT' regarding rudder pedal operation (Compliance), implying immediate behavioural change by flight crews/maintenance.","Multiple amendment history (original issue plus Amendments 1–3) and differing effective dates, requiring operators to track which revision applies to their aircraft and maintenance records.","Safety-critical context (Background cites a fatal overseas accident), which raises low tolerance for non-compliance and potential for enforcement action."],"plain_english_summary":"This Airworthiness Directive mandates specific inspections and/or corrective work on the tail-rotor Kevlar tie bar for Eurocopter SA 365 N1 and N2 helicopters fitted with listed tail-rotor blade part numbers, requiring actions exactly as set out in Eurocopter SA 365 S.B.05.34 Rev 3 and recurring every 250 flight hours. It also requires immediate compliance with the labelled “VERY IMPORTANT” rudder‑pedal instructions. The measure targets owners/operators who must perform the work, bear downtime and repair costs, and follow a safety-critical maintenance timetable after an overseas accident."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dauphin-35-amdt-3-tail-rotor-kevlar-tie-bar","history":"/api/acts/ad-dauphin-35-amdt-3-tail-rotor-kevlar-tie-bar/history","analysis":"/api/acts/ad-dauphin-35-amdt-3-tail-rotor-kevlar-tie-bar/analysis","conflicts":"/api/acts/ad-dauphin-35-amdt-3-tail-rotor-kevlar-tie-bar/conflicts","importantCases":"/api/acts/ad-dauphin-35-amdt-3-tail-rotor-kevlar-tie-bar/important-cases","documents":"/api/acts/ad-dauphin-35-amdt-3-tail-rotor-kevlar-tie-bar/documents"}}