{"id":"F2009L00888","name":"AD/EC 225/6 Amdt 1 - Main Rotor Hub Coning Stop Supports","slug":"ad-ec-225-6-amdt-1-main-rotor-hub-coning-stop-supports","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":78191,"registerId":"commonwealth-F2009L00888-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Eurocopter EC 225 Series Helicopters","sectionType":"division","heading":"Eurocopter EC 225 Series Helicopters","content":"### Eurocopter EC 225 Series Helicopters\n\n| AD/EC 225/6 Amdt 1 | Main Rotor Hub Coning Stop Supports | 4/2009 |\n| ------------------ | ----------------------------------- | ------ |\n\n| Applicability: | Model EC 225 LP helicopters, all serial numbers, except those that have been modified during production with MOD 0743718 or in-service with EUROCOPTER EC225 Service Bulletin (SB) No. 62-007 original issue, or later EASA approved revision. |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement: | 1. Carry out a check for cracks in the area of the attachment points on the main rotor hub reinforcement ring of the lugs securing the coning stop support and also of the lugs securing the dome fairing support, in accordance with the instructions given in paragraph 2.B.1 of EUROCOPTER EC 225 Alert Service Bulletin (ASB) No. 05A003 Revision 2 or later EASA approved revision.2. If, after the effective date of this Directive, a crack is found in one of the five lugs of the coning stop support or in one of the five lugs of the dome fairing support, remove and replace both the coning stop support assembly and the dome fairing support in accordance with the instructions of SB No. 62-007 original issue, or later EASA approved revision.3. Modification of any helicopters in accordance with EUROCOPTER EC 225 SB No. 62-005 (MOD 332A08.0929.00) is no longer allowed.4. All components installed and/or modified in accordance EUROCOPTER EC 225 SB No. 62-005 (Modification 332A08.0929.00), are to be removed from service.Replacement of parts in accordance with the instructions of SB No. 62-007 original issue, or later EASA approved revision, constitutes terminating action for the repetitive checks required by Requirement 1 of this Directive.To be able to reach a location where the coning stop support assembly or the dome fairing support can be replaced, a ferry flight without the dome fairing itself is permitted on the condition that:the dome fairing itself and its attachment screws are removed in accordance with the instructions given in the Note in paragraph 2.B.1.b of ASBNo. 05A003 Revision 1; and, |\n\n| | the flight crews are made aware that when flying without the dome fairing, the lateral vibrations of the helicopter significantly increase at speeds between 70 to 120 KIAS. This may be accomplished by inserting a copy of this Directive into the Normal Procedures section of the Rotorcraft Flight Manual for the duration of the ferry flight. The lateral vibration phenomenon does not affect flight safety.Note: EASA AD 2009-0024 refers. |\n| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Compliance: | 1. At intervals of 15 flight hours or 7 days, whichever occurs first; until SBNo. 62-007 is accomplished.2. Before further flight.3. From the effective date of this directive.4. Before further flight, unless already accomplished. |\n| | This Amendment becomes effective on 9 April 2009. |\n| Background: | This Directive was issued following reports of cracks and failure of the main rotor hub coning stop support lugs at their attachment points on the reinforcement ring where the dome fairing is secured. Some further cracks have been reported affecting the dome fairing support assemblies, in particular, but not confined to, those modified to SB No. 62-005. This Directive requires inspections of the dome fairing support lugs and the removal from service of parts installed during modification in accordance with SB No. 62-005.Amendment 1 is issued in response to a new EASA AD, which adds the requirement, in case of crack findings, to install the new main rotor hub coning stop support and dome fairing support. Relevant replacement of parts in accordance with SB No.62-007 constitutes terminating action for the repetitive checks required by this Directive. |\n\n![](image.001.png) \nDavid Villiers \nDelegate of the Civil Aviation Safety Authority\n\n25 February 2009","sortOrder":0},{"sectionNumber":"AD/EC 225/6 Amdt 1","sectionType":"part","heading":"AD/EC 225/6 Amdt 1","content":"## AD/EC 225/6 Amdt 1","sortOrder":1},{"sectionNumber":"Main Rotor Hub Coning Stop Supports","sectionType":"part","heading":"Main Rotor Hub Coning Stop Supports","content":"## Main Rotor Hub Coning Stop Supports","sortOrder":2},{"sectionNumber":"4/2009","sectionType":"part","heading":"4/2009","content":"## 4/2009","sortOrder":3}],"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":4,"scope_assessment":{"changed":false,"description":"This is a standard aviation safety directive amendment. The scope remains tightly focused on the specific mechanical defect (cracking in main rotor hub lugs) and the specific helicopter model (EC 225 LP). Amendment 1 adds the requirement to install new replacement parts when cracks are found, but this is a logical extension of the original safety purpose rather than scope creep."},"complexity_factors":["Multiple cross-references to external technical documents (EUROCOPTER ASB No. 05A003, SB No. 62-007, SB No. 62-005, EASA AD 2009-0024) that are not reproduced in the text","Conditional logic with nested exceptions: applicability excludes certain serial numbers IF modified with specific MOD numbers or SB versions","Four distinct requirements with different compliance timelines (interval-based, before further flight, from effective date)","Specific technical terminology requiring aviation engineering knowledge (coning stop support, dome fairing, reinforcement ring lugs, KIAS)","Procedural conditions for ferry flights with specific airspeed limitations and manual insertion requirements","Amendment structure referencing previous versions and explaining changes from prior directive"],"plain_english_summary":"This AD requires operators of Eurocopter EC225 LP helicopters (unless already modified per MOD 0743718 or SB 62‑007) to inspect main rotor hub lugs for cracks and to perform those inspections every 15 flight hours or 7 days until permanent repair. If cracks are found, both the coning stop support and dome fairing support must be replaced with approved parts; the earlier SB 62‑005 modification is now prohibited.\n\nFerry flights to a repair facility are allowed with the dome fairing removed, but pilots must be warned of increased vibration between 70–120 kt."},"flash_summary":{"complexity_score":6,"scope_assessment":{"changed":true,"description":"Amendment 1 expands the directive to require, where cracks are found, installation of new main rotor hub coning stop support and dome fairing support and clarifies that replacement per SB No. 62-007 constitutes terminating action for repetitive inspections. It also disallows and requires removal of parts fitted under SB No. 62-005 (Background; Requirement)."},"complexity_factors":["Multiple cross-references to external documents and revisions (EUROCOPTER EC 225 ASB No. 05A003 Rev 2; SB No. 62-007; SB No. 62-005 / MOD 332A08.0929.00) increase interpretive and compliance complexity (Applicability; Requirement).","Conditional mandatory actions: a finding of a crack triggers removal and replacement of both the coning stop support assembly and the dome fairing support (Requirement).","Repetitive inspection regime with short intervals (every 15 flight hours or 7 days, whichever first) until terminating action is performed creates logistical and cost burdens for operators (Compliance).","Prohibition and retroactive removal of parts installed under a specific previous modification (SB No. 62-005) requires inventory checks and potential grounded time for affected helicopters (Requirement; Compliance).","Termination mechanics: replacement per SB No. 62-007 is defined as terminating action for the repetitive checks, so operators must track accomplishment of that SB to stop inspections (Requirement; Background).","Operational exception (ferry flight without dome fairing) is allowed but conditional on specific removal instructions and crew briefing about increased lateral vibrations, adding an operational safety management step (Requirement).","Dependence on exact technical inspection locations (attachment points on reinforcement ring, specific lugs) and part-level work means specialised maintenance capability is required (Requirement; Background)."],"plain_english_summary":"This directive orders operators of Eurocopter EC 225 LP helicopters (with limited production/existing modification exceptions) to inspect the main rotor hub coning stop support and dome fairing support lugs for cracks at short intervals, replace both assemblies if a crack is found, and remove parts installed under a particular earlier modification. It affects owners, operators and maintenance providers, who must bear inspection and replacement costs and follow specified Eurocopter service bulletins and CASA instructions (Applicability; Requirement; Compliance)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ec-225-6-amdt-1-main-rotor-hub-coning-stop-supports","history":"/api/acts/ad-ec-225-6-amdt-1-main-rotor-hub-coning-stop-supports/history","analysis":"/api/acts/ad-ec-225-6-amdt-1-main-rotor-hub-coning-stop-supports/analysis","conflicts":"/api/acts/ad-ec-225-6-amdt-1-main-rotor-hub-coning-stop-supports/conflicts","importantCases":"/api/acts/ad-ec-225-6-amdt-1-main-rotor-hub-coning-stop-supports/important-cases","documents":"/api/acts/ad-ec-225-6-amdt-1-main-rotor-hub-coning-stop-supports/documents"}}