{"id":"F2005L02065","name":"AD/DAUPHIN/80 - Rotor Flight Controls - Collective Pitch Lever Restraining Tab","slug":"ad-dauphin-80-rotor-flight-controls-collective-pitch-lever-restraining-tab","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":36258,"registerId":"commonwealth-F2005L02065-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Eurocopter SA 360 and SA 365 (Dauphin) S","sectionType":"division","heading":"Eurocopter SA 360 and SA 365 (Dauphin) Series Helicopters","content":"### Eurocopter SA 360 and SA 365 (Dauphin) Series Helicopters\n\n| AD/DAUPHIN/80 | Rotor Flight Controls - CollectivePitch Lever Restraining Tab | 9/2005 |\n| ------------- | ------------------------------------------------------------- | ------ |\n\n| Applicability: | SA 365 N, N1 and AS 365 N2, N3 helicopters, fitted with collective pitch lever“low-pitch” locking system.                                                                                                                                                                                                                                                                                                                                                                                                                                          |\n| -------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Unless previously accomplished, check the collective pitch lever for correct unlocking and locking, in compliance with the instructions specified in paragraph 2 of EUROCOPTER AS 365 Alert Telex (AT) No. 67.00.10 R1 or later DGAC approved revisions; andAdjust, if necessary, the collective pitch lever restraining tab and the collective link rods, in accordance with paragraph 2 of EUROCOPTER AS 365 AT No. 67.00.10 R1 or later DGAC approved revisions.Note: DGAC AD F-2005-127 EASA approval No. 2005-6074 dated 12 July 2005 refers. |\n| Compliance:    | No later than within the next 50 flying hours after the effective date of this Directive.                                                                                                                                                                                                                                                                                                                                                                                                                                                          |\n|                | This Airworthiness Directive becomes effective on 1 September 2005.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |\n| Background:    | This Directive is in response to an instance of unwanted collective pitch lever locking which occurred in flight, when moving the collective pitch lever to the “low-pitch” position, and one case of unwanted collective pitch lever unlocking during engine starting.Unwanted collective pitch lever locking in flight can, in the worst case, cause the loss of the control of the helicopter, and unwanted unlocking on the ground can, in the worst case, cause uncontrolled takeoff of the helicopter.                                       |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n22 July 2005","sortOrder":0},{"sectionNumber":"AD/DAUPHIN/80","sectionType":"part","heading":"AD/DAUPHIN/80","content":"## AD/DAUPHIN/80","sortOrder":1},{"sectionNumber":"Rotor Flight Controls - CollectivePitch ","sectionType":"part","heading":"Rotor Flight Controls - CollectivePitch Lever Restraining Tab","content":"## Rotor Flight Controls - Collective  \nPitch Lever Restraining Tab","sortOrder":2},{"sectionNumber":"9/2005","sectionType":"part","heading":"9/2005","content":"## 9/2005","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"This Directive is narrowly corrective and appears consistent with its original safety purpose: to eliminate unwanted collective lever locking/unlocking. It does not broaden the subject matter beyond the original intent (no extension to additional systems, no new certification or design mandates, and no ongoing inspection programme). The instrument prescribes a single technical inspection/adjustment action tied to the manufacturer’s Alert Telex, which aligns with the reported incidents prompting the Directive."},"complexity_factors":["Short single‑subject AD (inspection/adjustment only)","Applicability limited to four model variants (SA 365 N, N1 and AS 365 N2, N3) fitted with the low‑pitch locking system","Single prescriptive action: check and adjust per paragraph 2 of one manufacturer Alert Telex","External document dependency: Eurocopter AS 365 Alert Telex No. 67.00.10 R1 or later DGAC‑approved revisions","Single compliance timeframe (within 50 flying hours)","References to foreign regulator documents (DGAC AD and EASA approval) but no internal definitions or nested exceptions","No multiple steps, conditional exemptions, or extensive cross‑references"],"plain_english_summary":"**What this instrument does (mechanically)**\n\n- Requires operators of certain Eurocopter Dauphin helicopters (models SA 365 N, N1 and AS 365 N2, N3) that are fitted with the collective pitch lever “low‑pitch” locking system to inspect the collective pitch lever for correct locking and unlocking, and to adjust the collective pitch lever restraining tab and the collective link rods if needed.\n- The inspection and any adjustment must be carried out in accordance with paragraph 2 of EUROCOPTER AS 365 Alert Telex No. 67.00.10 R1 (or any later revision that has DGAC approval).\n- The work must be completed within 50 flying hours after the Directive takes effect. The Directive referenced became effective 1 September 2005.\n\n**Who it affects**\n\n- Owners and operators of the specified Dauphin helicopter models that have the low‑pitch locking system installed. \n- Maintenance organisations and certificated maintenance personnel who perform the inspection and adjustments required by the manufacturer’s Alert Telex.\n- Pilots and flight operations that rely on the collective pitch lever for normal and emergency control (indirectly, because the AD reduces the risk of control anomalies).\n\n**Why it matters (safety and operational consequence)**\n\n- The directive responds to occurrences where the collective pitch lever unintentionally locked when moved to the low‑pitch position in flight, and one instance where it unintentionally unlocked during engine start on the ground. Unintended locking in flight can degrade or remove pilot control of lift; unintended unlocking on the ground can, in the worst case, permit an uncontrolled takeoff.\n\n**How it is implemented and who decides**\n\n- The actual technical check and any adjustment are to be performed by maintenance personnel following the Eurocopter Alert Telex (the manufacturer’s procedure). The regulatory requirement is to follow the specified paragraph of that Telex or later DGAC‑approved revisions.\n- Operators pay for the inspection/adjustment (labour, any parts, and associated aircraft downtime). The regulator (Civil Aviation Safety Authority as issuer of the Australian AD) enforces compliance; the DGAC/EASA references indicate coordination with the type‑certificate authority and European regulators.\n\n**Costs, incentives and trade‑offs**\n\n- Direct costs: a one‑off inspection for each affected aircraft within 50 flying hours, plus any labour/parts needed to adjust the restraining tab and link rods. Those costs are borne by the aircraft owner/operator.\n- Incentives: Compliance reduces the risk of hazardous in‑flight locking or unintended ground unlocking. Non‑compliance risks regulatory action and, more importantly, increased safety risk for flight operations.\n- Implementation risk and administrative points: the AD requires following a specific manufacturer Alert Telex or its later DGAC‑approved revisions; this creates a dependency on that external document for the exact technical steps and leaves little room for alternative procedures unless separately approved by the DGAC (the French authority).\n\n**Other practical notes**\n\n- The measure is narrowly targeted: it is an inspection and adjustment requirement, not a design change or mandatory part replacement.\n- The Directive cites a DGAC AD and an EASA approval number for the underlying action (administrative provenance), but the operative technical work is the Eurocopter Alert Telex’s paragraph 2.\n\n(References: Applicability, Requirement, Compliance and Background sections of the AD.)"},"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This Airworthiness Directive maintains its original narrow scope — addressing a specific mechanical defect in specific helicopter models. ADs are inherently limited-purpose instruments by design, and this one has not expanded beyond its original safety intent of fixing the collective pitch lever locking system."},"complexity_factors":["Single, specific mechanical issue addressed with clear procedural requirements","Only one defined applicability criterion (specific helicopter models with specific equipment)","Single compliance deadline (50 flying hours from effective date)","References external technical document (Eurocopter Alert Telex) but provides specific paragraph references","No nested exceptions, conditional logic, or alternative compliance methods","Short document with straightforward background-explanation-requirement structure","Minimal cross-referencing (only to the French DGAC AD and EASA approval for traceability)"],"plain_english_summary":"Owners and operators of certain Eurocopter Dauphin helicopters (SA 365 and AS 365 N series) must inspect and, if needed, adjust the collective pitch lever’s low‑pitch locking system to ensure it locks and unlocks correctly.  \n\nThis mandatory CASA directive — prompted by in‑service lock/unlock failures that risk loss of control or inadvertent liftoff — requires checks and possible restraining‑tab/link‑rod adjustments within 50 flight hours of 1 Sept 2005."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dauphin-80-rotor-flight-controls-collective-pitch-lever-restraining-tab","history":"/api/acts/ad-dauphin-80-rotor-flight-controls-collective-pitch-lever-restraining-tab/history","analysis":"/api/acts/ad-dauphin-80-rotor-flight-controls-collective-pitch-lever-restraining-tab/analysis","conflicts":"/api/acts/ad-dauphin-80-rotor-flight-controls-collective-pitch-lever-restraining-tab/conflicts","importantCases":"/api/acts/ad-dauphin-80-rotor-flight-controls-collective-pitch-lever-restraining-tab/important-cases","documents":"/api/acts/ad-dauphin-80-rotor-flight-controls-collective-pitch-lever-restraining-tab/documents"}}