{"id":"F2006B10606","name":"AD/HU 269/40 - Main Rotor Hub and Shaft Assemblies P/Nos 269A5305 and 269A5305-9 - Inspection","slug":"ad-hu-269-40-main-rotor-hub-and-shaft-assemblies-p-nos-269a5305-and-269a5305-9-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116475,"registerId":"commonwealth-F2006B10606-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HU 269/40 - Main Rotor Hub and Shaft Assemblies P/Nos 269A5305 and 269A5305-9 - 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)  Schweizer (Hughes) 269 Series Helicopters\n\n \n\nAD/HU 269/40 Main Rotor Hub and Shaft Assemblies P/Nos\n\n269A5305 and 269A5305-9 - Inspection\n\n\n10/71\n\n \n\nApplicability: Models 269A with S/Nos. 0011 and subsequent. 269A-1 with S/Nos. 0001 to 0041; 269B with S/Nos. 0001 to 0451; 269C with S/Nos. 0001 to 0100.\n\n \n\nDocument: Hughes SIN No. N-93.\n\n \n\nCompliance: Within 50 hours time in service after 14 October 1971.\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\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2079},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive maintains a narrow, technical scope focused solely on the safety inspection of specific main rotor components for defined helicopter models. There is no evidence of scope expansion beyond the original safety intent."},"complexity_factors":["Single, specific compliance action (inspection of defined parts)","Limited applicability restricted to specific serial number ranges","Incorporation by reference of external technical document (Hughes SIN No. N-93) for detailed procedures","Straightforward time-based compliance trigger (50 hours time in service)"],"plain_english_summary":"This Airworthiness Directive (AD) is a mandatory safety instruction requiring owners and operators of specific Schweizer (formerly Hughes) 269 series helicopters to inspect critical rotating components.\n\n**What must be done:**\n- Inspect the main rotor hub and shaft assemblies bearing part numbers 269A5305 and 269A5305-9\n- Follow the inspection procedures detailed in Hughes Service Information Notice (SIN) No. N-93\n\n**Which aircraft are affected:**\n- Model 269A (serial numbers 0011 and onwards)\n- Model 269A-1 (serial numbers 0001 to 0041)\n- Model 269B (serial numbers 0001 to 0451)  \n- Model 269C (serial numbers 0001 to 0100)\n\n**Compliance deadline:**\nWithin 50 hours of flight time after 14 October 1971.\n\n**Why this matters:**\nThe main rotor hub and shaft are critical components that keep the helicopter airborne. This directive addresses potential defects that could lead to catastrophic rotor failure and loss of the aircraft if not detected."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hu-269-40-main-rotor-hub-and-shaft-assemblies-p-nos-269a5305-and-269a5305-9-inspection","history":"/api/acts/ad-hu-269-40-main-rotor-hub-and-shaft-assemblies-p-nos-269a5305-and-269a5305-9-inspection/history","analysis":"/api/acts/ad-hu-269-40-main-rotor-hub-and-shaft-assemblies-p-nos-269a5305-and-269a5305-9-inspection/analysis","conflicts":"/api/acts/ad-hu-269-40-main-rotor-hub-and-shaft-assemblies-p-nos-269a5305-and-269a5305-9-inspection/conflicts","importantCases":"/api/acts/ad-hu-269-40-main-rotor-hub-and-shaft-assemblies-p-nos-269a5305-and-269a5305-9-inspection/important-cases","documents":"/api/acts/ad-hu-269-40-main-rotor-hub-and-shaft-assemblies-p-nos-269a5305-and-269a5305-9-inspection/documents"}}