{"id":"F2006B10658","name":"AD/HU 369/1 Amdt 16 - Retirement Life - Fatigue Critical Components","slug":"ad-hu-369-1-amdt-16-retirement-life-fatigue-critical-components","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116580,"registerId":"commonwealth-F2006B10658-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HU 369/1 Amdt 16 - Retirement Life - Fatigue Critical Components","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)  \nMcDonnell Douglas (Hughes) and Kawasaki 369 Series Helicopters\n\nAD/HU 369/1\n\nAmdt 16\n\n  \nRetirement Life \\- Fatigue Critical Components 7/95\n\nApplicability: All models.\n\nRequirement: As applicable to each helicopter model, all components listed in the following references shall be retired at or before the times quoted therein.\n\n    For 369H, 369HE, 369HM and 369HS series: Hughes 369H Series Basic Handbook of Maintenance Instructions Appendix “B” (CSP-H-4), Reissued 17 March 1992, Revision 3, Section 2.\n\n    2. For 369D, 369E, 369FF and 500N series: Hughes 369D, 369E 369FF and 500N series Basic Handbook of Maintenance Instructions (CSP-HMI-2) issued October 31 1990, Revision 11, Chapter 4.\n\nNote: Operators of aircraft engaged in unusual manoeuvres, such as agricultural, cattle mustering or operations where more than four rotor full stops per hour are achieved must consult the manufacturer giving full details including previous history of all operations for possible life revision and must advise the Authority accordingly. For the purposes of notification, two flights concluding with the rotor turning at idle or greater power setting shall be counted as equivalent to one flight with rotors to a full stop.\n\nCompliance: This Amendment is effective 22 June 1995.\n\nBackground: This Amendment references the latest issue of the Requirement Documents which also cover the models 369FF and 500N.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1481},"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":false,"description":"This amendment expands coverage to include models 369FF and 500N by referencing updated maintenance handbooks, but this remains within the original scope of regulating fatigue-critical component retirement for the 369 helicopter family."},"complexity_factors":["Cross-references to specific technical manual editions (CSP-H-4 Revision 3 and CSP-HMI-2 Revision 11) with different requirements for different model series","Conditional compliance logic for 'unusual manoeuvres' requiring operator calculations and manufacturer consultation","Bifurcated applicability structure separating 369H-series from 369D/E/FF/500N-series helicopters","Technical counting rule for rotor stops (equivalency calculation for idle vs. full stop landings)"],"plain_english_summary":"This safety directive requires operators of certain Hughes, McDonnell Douglas, and Kawasaki 369-series and 500N helicopters to retire fatigue-prone parts at specified hour/cycle limits to prevent metal‑fatigue failures. \n\nIf the helicopter is used for heavy-duty work (e.g., frequent landings or crop work exceeding four full stops per hour), operators must provide operational history to the manufacturer because parts may need earlier replacement."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hu-369-1-amdt-16-retirement-life-fatigue-critical-components","history":"/api/acts/ad-hu-369-1-amdt-16-retirement-life-fatigue-critical-components/history","analysis":"/api/acts/ad-hu-369-1-amdt-16-retirement-life-fatigue-critical-components/analysis","conflicts":"/api/acts/ad-hu-369-1-amdt-16-retirement-life-fatigue-critical-components/conflicts","importantCases":"/api/acts/ad-hu-369-1-amdt-16-retirement-life-fatigue-critical-components/important-cases","documents":"/api/acts/ad-hu-369-1-amdt-16-retirement-life-fatigue-critical-components/documents"}}