{"id":"F2006B06469","name":"AD/R44/2 - Cyclic Control System","slug":"ad-r44-2-cyclic-control-system","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47962,"registerId":"commonwealth-F2006B06469-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/R44/2 - Cyclic Control System","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)  \nRobinson R44 Series Helicopters\n\nAD/R44/2 Cyclic Control System 3/95\n\nApplicability: Model R44 series helicopters with serial numbers less than but not including serial number 0017.\n\nRequirement: Remove the following cyclic control system parts and replace them with the corresponding replacement parts in accordance with the applicable maintenance manual:\n\nRemove Part No’s Replace with Part No’s\n\nA205-3 A205-5 Revision J or subsequent FAA approved revisions. C175-1 C175-2 Revision H or subsequent FAA approved revisions. C176-1 C176-2 Revision B or subsequent FAA approved revisions. C177-1 C177-2 Revision F or subsequent FAA approved revisions. C319-1 C319-3 Revision I or subsequent FAA approved revisions. C320-1 C320-1 Revision L or subsequent FAA approved revisions. C958-4 C958-5 Revision E or subsequent FAA approved revisions. A101-4 D173-1 Revision A or subsequent FAA approved revisions. C338-1 C338-4 Revision C or subsequent FAA approved revisions. A211-2 A211-3 Revision I or subsequent FAA approved revisions. A137-1 A137-2 Revision C or subsequent FAA approved revisions.\n\nNote: FAA AD 94-26-10 39-9105 refers.\n\nCompliance: Prior to the issue of a Certificate of Airworthiness.\n\nThis Directive is effective from 2 March 1995.\n\nBackground: The FAA has determined that the original cyclic control system design meets existing FAA design standards, but has limited damage tolerance characteristics and does not display slow crack growth properties. The actions specified by this AD are intended to prevent failure of the cyclic control system and subsequent loss of control of the helicopter.","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":"Scope aligns with the stated intent in the Background: to address limited damage tolerance and absence of slow crack growth in the original cyclic control design by replacing listed parts on affected serial-numbered R44 helicopters. The directive's Applicability, Requirement and Compliance sections (Applicability; Requirement; Compliance; Background) implement that objective without expanding to other models, serial ranges, or alternative corrective measures."},"complexity_factors":["Narrow applicability by serial number (Applicability): only R44 helicopters with serial numbers less than 0017 are affected.","Precise parts-by-parts replacement list required (Requirement): enumerates original and replacement part numbers.","Mandated compliance timing (Compliance): replacements must be done prior to issue of Certificate of Airworthiness.","Requirement to follow maintenance manual procedures (Requirement): work must be performed in accordance with the applicable maintenance manual.","Permits FAA‑approved revisions for replacement parts (Requirement): allows later FAA revisions, introducing version-control considerations.","Cross-reference to FAA AD 94-26-10 (Note): reliance on related FAA directive for background/technical basis.","Limited discretion and no express alternative compliance pathway (Requirement/Compliance): directive prescribes specific action without mentioning exemptions or alternatives.","Technical basis concise and specific (Background): cites limited damage tolerance and lack of slow crack growth as the reason, which constrains the remedy to parts replacement."],"plain_english_summary":"**What it does:** Requires removal and replacement of specified cyclic control parts on Robinson R44 helicopters with serial numbers before 0017, using updated part numbers and FAA‑approved revisions, and completion before issuing a Certificate of Airworthiness.\n\nIt affects owners/operators of those R44s who must pay for parts and maintenance downtime. The FAA's stated rationale is the original parts have limited damage tolerance and do not display slow crack growth; the replacements aim to reduce the risk of cyclic control failure."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific mechanical defect in early-production R44 helicopters. It has not expanded beyond its original purpose of mandating replacement of cyclic control system components with improved damage-tolerant parts."},"complexity_factors":["Single, unambiguous requirement (replace specific parts)","Clear applicability criteria (serial numbers below 0017)","Simple compliance trigger (prior to Certificate of Airworthiness issuance)","No nested conditions, exceptions, or cross-references to other legislation beyond a single reference to the corresponding FAA directive","Straightforward table format for part numbers with only 11 entries","No defined terms section or interpretive provisions"],"plain_english_summary":"This Airworthiness Directive requires owners/operators of early-model Robinson R44 helicopters (serials below 0017) to replace certain cyclic control parts before a Certificate of Airworthiness is issued. It responds to parts with limited damage tolerance that can develop rapidly propagating cracks, risking sudden flight‑control failure and loss of control. Effective 2 March 1995; it mirrors FAA AD 94‑26‑10."}},"importantCases":[],"_links":{"self":"/api/acts/ad-r44-2-cyclic-control-system","history":"/api/acts/ad-r44-2-cyclic-control-system/history","analysis":"/api/acts/ad-r44-2-cyclic-control-system/analysis","conflicts":"/api/acts/ad-r44-2-cyclic-control-system/conflicts","importantCases":"/api/acts/ad-r44-2-cyclic-control-system/important-cases","documents":"/api/acts/ad-r44-2-cyclic-control-system/documents"}}