{"id":"F2006B02499","name":"AD/AS 355/45 - Cyclic Pitch Change Rod","slug":"ad-as-355-45-cyclic-pitch-change-rod","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41755,"registerId":"commonwealth-F2006B02499-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AS 355/45 - Cyclic Pitch Change Rod","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Eurocopter AS 355 (Twin Ecureuil) Series Helicopters\n\n \n\nAD/AS 355/45 Cyclic Pitch Change Rod 11/94\n\nApplicability: Models E, F, F1, F2 and N fitted with cyclic pitch change control rod P/No 704A34- 113-279, and not fitted with an auto-pilot.\n\n \n\nRequirement: Action in accordance with Eurocopter AS 355 Service Bulletin 01-38.\n\n \n\nNote: DGAC AD 94-179-051(B) refers.\n\n \n\nCompliance: Within 100 hours time in service after 13 October 1994.\n\n \n\nBackground: The manufacturer has determined that some control rods may not be ‘in safety’.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive targeting a specific mechanical defect in a specific aircraft model. It has not expanded beyond its original purpose of addressing the identified control rod safety issue."},"complexity_factors":["Very short document (approximately 150 words)","Only 2 defined applicability criteria (specific part number and absence of auto-pilot)","Single requirement referencing an external technical document (Service Bulletin)","Simple compliance deadline (100 hours time in service from fixed date)","No nested exceptions, conditional logic, or cross-references to other legislation","Straightforward background statement without technical elaboration"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order for aircraft owners and operators.\n\n**What it does:**\nOrders owners of specific Eurocopter AS 355 helicopter models to inspect or replace a particular part called the \"cyclic pitch change control rod\" (part number 704A34-113-279). This rod is part of the helicopter's flight control system — it helps translate the pilot's stick movements into changes in the rotor blade angles.\n\n**Who it affects:**\nOwners and operators of Eurocopter AS 355 E, F, F1, F2 and N model helicopters that:\n- Have the specific control rod installed, AND\n- Do NOT have an auto-pilot system fitted\n\n**What must be done:**\nFollow the instructions in Eurocopter Service Bulletin 01-38 (a technical document from the manufacturer detailing the required inspection or replacement procedure).\n\n**When it must be done:**\nWithin 100 hours of flight time after 13 October 1994.\n\n**Why it matters:**\nThe manufacturer discovered that some of these control rods might not be \"in safety\" — meaning they could potentially fail in flight. A failure of this component could cause loss of control of the helicopter. This directive prevents accidents by forcing operators to check or replace the suspect parts before they can fail."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument's scope matches the stated intent in the text: it targets a defined set of AS 355 models fitted with a specific part number and without an autopilot, and mandates the corrective action in the manufacturer’s Service Bulletin within a fixed 100-hour compliance window. No broader categories, additional aircraft types, or alternative compliance routes are introduced in the text (Applicability, Requirement, Compliance)."},"complexity_factors":["Narrow and specific applicability tied to model, part number and lack of autopilot (Applicability).","Mandated action is a single external document (Eurocopter Service Bulletin 01-38) rather than multiple procedures (Requirement).","A single fixed compliance window (100 hours after 13 October 1994) limits temporal complexity (Compliance).","No alternative compliance pathways, exemptions or conditional tests are provided in the text, reducing legal complexity (Requirement, Compliance).","Cross-reference to a foreign AD (DGAC AD 94-179-051(B)) introduces minor interpretive linkage but not substantial procedural complexity (Note)."],"plain_english_summary":"The AD mandates that operators of Eurocopter AS 355 Models E, F, F1, F2 and N fitted with cyclic pitch change control rod P/No 704A34-113-279 and without autopilot must carry out Eurocopter Service Bulletin 01‑38 within 100 hours TIS after 13 October 1994.\n\nThis affects those operators/owners, who must pay for parts, labour and downtime; the action addresses a manufacturer‑identified safety concern with some control rods."}},"importantCases":[],"_links":{"self":"/api/acts/ad-as-355-45-cyclic-pitch-change-rod","history":"/api/acts/ad-as-355-45-cyclic-pitch-change-rod/history","analysis":"/api/acts/ad-as-355-45-cyclic-pitch-change-rod/analysis","conflicts":"/api/acts/ad-as-355-45-cyclic-pitch-change-rod/conflicts","importantCases":"/api/acts/ad-as-355-45-cyclic-pitch-change-rod/important-cases","documents":"/api/acts/ad-as-355-45-cyclic-pitch-change-rod/documents"}}