{"id":"F2006B02522","name":"AD/AS 355/72 Amdt 1 - Cyclic Control","slug":"ad-as-355-72-amdt-1-cyclic-control","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41778,"registerId":"commonwealth-F2006B02522-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AS 355/72 Amdt 1 - Cyclic Control","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Safety 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\nFor the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/AS 355/72 and issues the following AD under subregulation 39.1 (1) of CASR 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\n![](image.001.png)  \n\nEurocopter AS 355 (Twin Ecureuil) Series Helicopters\n\nAD/AS 355/72\n\nAmdt 1\n\n  \nCyclic Control 5/2004\n\nApplicability: Model AS 355 helicopters, versions E, F, F1, F2, and N, with MOD 070682 incorporated (Eurocopter AS 355 Service Bulletin No. 67.08), and before incorporation of MOD 073179.\n\nRequirement: Accomplish the requirements of Eurocopter AS 350 Alert Service Bulletin No.\n\n67.00.24.\n\nNote: DGAC AD F-2003-003 R1 refers.\n\nCompliance: Before 12 March 2003, unless already accomplished. Thereafter, after each readjustment of the cyclic stick longitudinal nose-up control stop, accomplish Paragraph 2.B.1 of the Requirement document.\n\nThe compliance times remain unchanged by this issue. This Amendment becomes effective on 13 May 2004.\n\nBackground: The manufacturer determined that there could be a risk of interference when applying a load to the cyclic stick in the nose-up control stop position configuration, during a give-way manoeuvre.\n\nAmendment 1 is issued in response to a revision of the related DGAC AD, which introduces the conversion of the previous Alert Telex Requirement document to Alert Service Bulletin, with no change to technical content.\n\n![](image.002.png)  \n\nDavid Villiers\n\nDelegate of the Civil Aviation Safety Authority 2 April 2004\n\n![](image.001.png)\n\nThe above AD is notified in the Commonwealth of Australia Gazette on 21 April 2004.\n\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"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Amendment 1 does not change the substantive scope. The AD continues to apply to the same AS 355 model/ modification combination and requires the same corrective actions in Eurocopter Alert Service Bulletin No. 67.00.24; the amendment converts the referenced document format (Alert Telex → Alert Service Bulletin) with no change to technical content and leaves compliance times unchanged (Background; Applicability; Requirement; Compliance)."},"complexity_factors":["Targeted applicability tied to specific helicopter models and incorporated modifications, creating a conditional population of affected aircraft (Applicability).","Normative dependence on an external manufacturer document — Eurocopter Alert Service Bulletin No. 67.00.24 — for required corrective work (Requirement).","Compliance schedule includes a retrospective deadline and ongoing obligations after each cyclic‑stick readjustment, which adds operational monitoring (Compliance).","Administrative amendment converts a referenced Alert Telex into an Alert Service Bulletin while claiming no technical change, requiring cross‑checking of versions (Background).","Legal mechanism: CASA delegate revokes and reissues the AD under CASR 1998 subregulation 39.1(1), creating a formal mandatory direction (opening paragraphs).","Technical risk is narrowly described (interference during a give‑way manoeuvre at the nose‑up control stop), focusing the mandated action on a specific hazard (Background)."],"plain_english_summary":"This AD requires operators of Eurocopter AS 355 E/F/F1/F2/N helicopters with MOD 070682 (and not yet MOD 073179) to carry out the actions in Eurocopter Alert Service Bulletin No. 67.00.24 to fix potential cyclic‑stick interference at the nose‑up control stop. CASA issued the AD under CASR 1998 to correct that unsafe condition.\n\nOperators must comply by the stated times and will bear the cost of the work; Amendment 1 only revises the referenced document format (Alert Telex → Alert Service Bulletin) without changing the technical requirement."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment makes no substantive change to scope. It is purely administrative — updating the reference from an Alert Telex to an Alert Service Bulletin at the request of the French DGAC. The technical requirements, applicability, and compliance times remain identical to the original AD."},"complexity_factors":["Multiple nested applicability conditions (specific model variants PLUS modification status — must have MOD 070682 but NOT have MOD 073179)","Cross-reference to external technical document (Eurocopter AS 350 Alert Service Bulletin No. 67.00.24) without reproducing its contents","Dual compliance structure: one-time deadline (12 March 2003) plus recurring requirement tied to maintenance events","Reference to foreign regulatory document (DGAC AD F-2003-003 R1) creating transnational regulatory dependency","Amendment mechanism requires understanding of predecessor directive (AD/AS 355/72) to fully assess current obligations"],"plain_english_summary":"This AD revokes and replaces the earlier notice for Eurocopter AS 355 E/F/F1/F2/N helicopters that have MOD 070682 but not MOD 073179, requiring the corrective actions in Eurocopter Alert Service Bulletin No. 67.00.24. It fixes a risk of part interference when the cyclic is pulled fully back, must have been complied with by 12 March 2003, and requires repeating a specific check whenever the cyclic nose‑up stop is readjusted."}},"importantCases":[],"_links":{"self":"/api/acts/ad-as-355-72-amdt-1-cyclic-control","history":"/api/acts/ad-as-355-72-amdt-1-cyclic-control/history","analysis":"/api/acts/ad-as-355-72-amdt-1-cyclic-control/analysis","conflicts":"/api/acts/ad-as-355-72-amdt-1-cyclic-control/conflicts","importantCases":"/api/acts/ad-as-355-72-amdt-1-cyclic-control/important-cases","documents":"/api/acts/ad-as-355-72-amdt-1-cyclic-control/documents"}}