{"id":"F2006B10581","name":"AD/HU 269/105 - Tailboom Support Struts","slug":"ad-hu-269-105-tailboom-support-struts","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116425,"registerId":"commonwealth-F2006B10581-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HU 269/105 - Tailboom Support Struts","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)  \nSchweizer (Hughes) 269 Series Helicopters\n\nAD/HU 269/105 Tailboom Support Struts 9/95\n\nApplicability: All models.\n\nRequirement: Chemically remove the paint and sealant from the tapered ends of the tailboom support struts as shown in Figure 1.\n\nInspect the tailboom support struts for cracks using a colour contrast or fluorescent dye penetrant in accordance with CAO 108.10. When inspecting the tailboom support struts pay particular attention to the surface between the bolt holes.\n\nIf no cracks are detected and nicks, dents and scratches do not exceed the limits specified in the Schweizer HMI, clean the tailboom support struts and repaint.\n\n![](image.002.png)  \n\nFigure 1. Tailboom support strut.\n\nCompliance: Inspect the tailboom support struts before 200 hours time in service after 17 August 1995.\n\nBackground: The inspection of the tailboom centre attachment fittings (P/N 269A2324 and \\-7) has been incorporated in the Schweizer HMI. Cracking of a tailboom support strut has been reported. The crack was not evident until the paint was removed.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2125},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow scope as a targeted safety inspection mandate addressing a specific structural failure mode (cracking in tailboom support struts) for a specific helicopter type."},"complexity_factors":["Single, unambiguous applicability clause (all models of one aircraft series)","Linear procedural steps without nested conditional logic","Only two external document references (CAO 108.10 for inspection method, Schweizer HMI for damage limits)","No defined terms or interpretation section","Single compliance deadline with straightforward calculation method"],"plain_english_summary":"Owners/operators of Schweizer (Hughes) 269 series helicopters must perform a mandatory inspection of the tailboom support struts: strip paint/sealant from the tapered ends and conduct a dye‑penetrant inspection, repairing, replacing, or repainting the struts as required.  \n\nThis action responds to cracks found hidden beneath paint that could cause tail separation and loss of control. Inspections must be completed before the helicopter accumulates 200 flight hours after 17 August 1995."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hu-269-105-tailboom-support-struts","history":"/api/acts/ad-hu-269-105-tailboom-support-struts/history","analysis":"/api/acts/ad-hu-269-105-tailboom-support-struts/analysis","conflicts":"/api/acts/ad-hu-269-105-tailboom-support-struts/conflicts","importantCases":"/api/acts/ad-hu-269-105-tailboom-support-struts/important-cases","documents":"/api/acts/ad-hu-269-105-tailboom-support-struts/documents"}}