{"id":"F2006B10744","name":"AD/HU 369/8 - Tail Rotor Blades - Inspection","slug":"ad-hu-369-8-tail-rotor-blades-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116749,"registerId":"commonwealth-F2006B10744-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HU 369/8 - Tail Rotor Blades - Inspection","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)  McDonnell Douglas (Hughes) and Kawasaki 369 Series Helicopters\n\n \n\nAD/HU 369/8  Tail Rotor Blades - Inspection 2/71 Applicability:  All models with tail rotor blades with S/Nos. as listed in Hughes SIN No. HN-19.1. Document:              Hughes SIN No. HN-19.1.\n\nCompliance:   1. At each pre-flight inspection for tail rotor assemblies with less than 100 hours time in service as at 10 February 1971.\n\n \n\n2. Within 10 hours time in service after 10 February 1971 for tail rotor assemblies with more than 100 hours time in service at 10 February 1971.\n\n \n\nNote: These inspections may be performed and certified for by the pilot.\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":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1847},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive remains tightly scoped to its original safety purpose: mandating inspections of specific tail rotor blades on identified helicopter models. No expansion of scope detected."},"complexity_factors":["External reference to Hughes Service Information Notice HN-19.1 for specific serial number applicability","Historical date threshold (10 February 1971) determining compliance path","Bifurcated compliance based on flight hours accumulated at a specific past date"],"plain_english_summary":"This directive requires mandatory safety inspections of tail rotor blades on certain Hughes/McDonnell Douglas and Kawasaki 369-series helicopters (specified by serial numbers in Hughes Service Information Notice HN-19.1) to prevent catastrophic tail-rotor failure and loss of control.\n\nOwners/operators must inspect blades either before every flight if the blade had under 100 flight hours as of 10 Feb 1971, or within 10 flight hours if it had over 100; pilots may perform and sign off the inspections."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hu-369-8-tail-rotor-blades-inspection","history":"/api/acts/ad-hu-369-8-tail-rotor-blades-inspection/history","analysis":"/api/acts/ad-hu-369-8-tail-rotor-blades-inspection/analysis","conflicts":"/api/acts/ad-hu-369-8-tail-rotor-blades-inspection/conflicts","importantCases":"/api/acts/ad-hu-369-8-tail-rotor-blades-inspection/important-cases","documents":"/api/acts/ad-hu-369-8-tail-rotor-blades-inspection/documents"}}