{"id":"F2006B06444","name":"AD/R22/4 Amdt 7 - Retirement Lives - Fatigue Critical Components","slug":"ad-r22-4-amdt-7-retirement-lives-fatigue-critical-components","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47879,"registerId":"commonwealth-F2006B06444-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/R22/4 Amdt 7 - Retirement Lives - Fatigue Critical Components","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)  Robinson R22 Series Helicopters\n\n \n\nAD/R22/4\n\nAmdt 7\n\n\nRetirement Lives - Fatigue Critical Components 7/95\n\n \n\nApplicability: All Models.\n\n \n\nRequirement: Retire from service all components listed in Robinson Helicopter Company R22 Maintenance Manual (MM), Revision 14, Section 3, Table 3-1, Fatigue Limited Parts, at or before the times specified therein. Time in service shall be computed in accordance with Paragraph 3.002 of the MM.\n\n \n\nNote: Main rotor blades P/N A016-1 S/N 1 to 810 are not eligible for service.\n\n \n\nCompliance: This Amendment is effective 22 June 1995.\n\n \n\nBackground:  This Directive requires compliance with the manufacturer’s life limitation schedule for the aircraft. This Amendment reflects the latest revision of the R22 Maintenance Manual.\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":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1367},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is Amendment 7, which simply updates the reference to the manufacturer's Maintenance Manual to Revision 14. The scope remains unchanged: enforcing fatigue life limits on critical components."},"complexity_factors":["Single, straightforward requirement with clear external reference to Maintenance Manual table","No defined terms section—relies entirely on manufacturer documentation for technical specifications","Only one exception (specific rotor blade serial number range ban)","No conditional logic, cross-references to other legislation, or nested exceptions"],"plain_english_summary":"## What this does\n\nThis Airworthiness Directive (safety rule) applies to **all Robinson R22 helicopters**.\n\n**The core requirement:** Owners and operators must permanently retire (replace) specific helicopter parts before they exceed their 'fatigue life' limits. These time limits are listed in the manufacturer's Maintenance Manual (Revision 14), Section 3, Table 3-1.\n\n**Key details:**\n- **Fatigue critical components** are parts that weaken from repeated vibration and flight stresses—if used too long, they can snap or fail catastrophically\n- You must calculate 'time in service' using the method in Paragraph 3.002 of the manual\n- **Critical exception:** Main rotor blades with part number A016-1 and serial numbers 1 through 810 are **banned entirely**—they cannot be used even if they haven't reached their time limit\n\n**Why it matters:** This prevents crashes caused by metal fatigue. By forcing replacement of worn parts before they break, the rule keeps the helicopter safe to fly."}},"importantCases":[],"_links":{"self":"/api/acts/ad-r22-4-amdt-7-retirement-lives-fatigue-critical-components","history":"/api/acts/ad-r22-4-amdt-7-retirement-lives-fatigue-critical-components/history","analysis":"/api/acts/ad-r22-4-amdt-7-retirement-lives-fatigue-critical-components/analysis","conflicts":"/api/acts/ad-r22-4-amdt-7-retirement-lives-fatigue-critical-components/conflicts","importantCases":"/api/acts/ad-r22-4-amdt-7-retirement-lives-fatigue-critical-components/important-cases","documents":"/api/acts/ad-r22-4-amdt-7-retirement-lives-fatigue-critical-components/documents"}}