{"id":"F2006B10596","name":"AD/HU 269/25 Amdt 1 - Lateral Control Bellcrank (P/N 269A7506) - Replacement","slug":"ad-hu-269-25-amdt-1-lateral-control-bellcrank-p-n-269a7506-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116455,"registerId":"commonwealth-F2006B10596-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HU 269/25 Amdt 1 - Lateral Control Bellcrank (P/N 269A7506) - Replacement","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 269/25\n\nAmdt 1\n\n\nLateral Control Bellcrank (P/N 269A7506) - Replacement\n\n\n7/69\n\n \n\nApplicability: Model 269A with S/Nos. 0011 to 1033.\n\n \n\nModel 269A-1 S/Nos. 0001 to 0041. Model 269B with S/Nos. 0001 to 0398.\n\nDocument: Hughes SIN N-37.2.\n\n \n\nCompliance: 1. At or before 900 hours total time in service for bellcranks having less than 800 hours total time in service at 4 July 1969.\n\n \n\n2. Within 100 hours time in service for bellcranks having 800 hours or more total time in service as at 4 July 1969. Bellcranks having over 900 hours total time in service are also subject to the inspection requirements of Step II Paras. a.1, 2 and 3 of Hughes SIN N-37.2 during the 100 hour compliance period.\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":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"As Amendment 1, the instrument sets specific replacement and inspection deadlines for P/N 269A7506 on identified Model 269A/269A‑1/269B helicopters (by serial number) and establishes two compliance time bands based on hours in service as at 4 July 1969, with additional Step II inspections for bellcranks over 900 hours (Compliance paras 1–2; Hughes SIN N‑37.2). This amends the prior directive by defining those time thresholds and inspection requirements."},"complexity_factors":["Applicability limited to multiple model variants with specific serial‑number ranges (requires cross‑checking airframe records).","Time‑based compliance tied to bellcrank total hours as at a historical date (4 July 1969), increasing record‑verification burden.","Two distinct compliance bands (bellcranks <800 hrs → by 900 hrs; ≥800 hrs → within 100 hrs) plus special treatment for >900 hrs (Compliance paras 1–2).","External technical procedures referenced (Hughes SIN N‑37.2, Step II paras a.1–3) rather than reproduced, requiring access to and interpretation of that document.","Text specifies outcome (replacement/inspection) but omits procedural and cost details, leaving implementation discretion to operators and maintenance providers.","Amendment label (Amdt 1) indicates a change from an earlier directive, so operators must confirm which version applies to their aircraft."],"plain_english_summary":"This airworthiness directive requires replacement of the lateral control bellcrank (P/N 269A7506) on specified Schweizer (Hughes) 269‑series helicopters and sets deadlines tied to each bellcrank’s total hours in service (measured as at 4 July 1969). Operators/owners of affected Model 269A, 269A‑1 and 269B helicopters within the listed serial‑number ranges must meet one of two compliance windows and, where bellcranks exceed 900 hours, perform additional Step II inspections in Hughes SIN N‑37.2 (Compliance paras 1–2)."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a narrow, technical airworthiness directive focused on a single mechanical component replacement. It has not expanded beyond its original safety purpose. The 'Amdt 1' notation indicates this is an amendment to a prior directive, but the scope remains tightly constrained to the bellcrank replacement issue."},"complexity_factors":["Short, single-purpose directive with one mechanical action required","Only 3 aircraft models affected with clearly defined serial number ranges","Two-tier compliance structure based on flight hours (under 800 vs 800+ hours)","Single cross-reference to external technical document (Hughes SIN N-37.2) for inspection procedures","No defined terms section or interpretation provisions","Temporal anchor date (4 July 1969) creates simple calculation for compliance deadlines"],"plain_english_summary":"This is an **Airworthiness Directive** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) that requires aircraft owners to fix a specific mechanical problem.\n\n**What it does:**\nOrders owners of certain **Schweizer (Hughes) 269 series helicopters** to replace a faulty part called the **\"lateral control bellcrank\"** (part number 269A7506). This component is part of the helicopter's flight control system that helps steer the aircraft left and right.\n\n**Who it affects:**\nOwners and operators of specific helicopter models and serial numbers:\n- **Model 269A** — serial numbers 0011 to 1033\n- **Model 269A-1** — serial numbers 0001 to 0041  \n- **Model 269B** — serial numbers 0001 to 0398\n\n**When they must comply:**\nThe deadline depends on how many hours the part has already flown:\n- **Low-use bellcranks** (under 800 flight hours as of 4 July 1969): Replace by the time the part reaches **900 total flight hours**\n- **High-use bellcranks** (800+ flight hours as of 4 July 1969): Replace **within the next 100 flight hours**\n- **Very high-use bellcranks** (already over 900 hours): Must also undergo specific inspections outlined in Hughes Service Information Notice N-37.2 during that 100-hour window\n\n**Why it matters:**\nAirworthiness Directives are legally binding. If operators don't comply, they cannot fly the aircraft. This directive prevents potential control system failures that could lead to loss of control and crashes."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hu-269-25-amdt-1-lateral-control-bellcrank-p-n-269a7506-replacement","history":"/api/acts/ad-hu-269-25-amdt-1-lateral-control-bellcrank-p-n-269a7506-replacement/history","analysis":"/api/acts/ad-hu-269-25-amdt-1-lateral-control-bellcrank-p-n-269a7506-replacement/analysis","conflicts":"/api/acts/ad-hu-269-25-amdt-1-lateral-control-bellcrank-p-n-269a7506-replacement/conflicts","importantCases":"/api/acts/ad-hu-269-25-amdt-1-lateral-control-bellcrank-p-n-269a7506-replacement/important-cases","documents":"/api/acts/ad-hu-269-25-amdt-1-lateral-control-bellcrank-p-n-269a7506-replacement/documents"}}