{"id":"F2006B07220","name":"AD/SWSA226/77 - Engine Power Control Cable","slug":"ad-swsa226-77-engine-power-control-cable","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":49011,"registerId":"commonwealth-F2006B07220-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SWSA226/77 - Engine Power Control Cable","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)  Fairchild (Swearingen) SA226 and SA227 Series Aeroplanes\n\n \n\nAD/SWSA226/77 Engine Power Control Cable 5/96\n\nApplicability: SA226-T, SA226-T(B), SA226-AT, SA226-TC, SA227-TT, SA227-AT, SA227-AC, SA227-BC, SA227-CC, and SA227-DC.\n\n \n\nRequirement: Action in accordance with the following Fairchild Service Bulletins as applicable: a. 226-76-009,\n\nb. 227-76-004, or\n\n \n\nc. CC7-76-001.\n\n \n\nNote: FAA AD 96-03-03 refers.\n\n \n\nCompliance: Within 100 hours time in service after 25 April 1996.\n\n \n\nBackground: There have been reports of cable attaching hardware failing, one failure of which resulted in engine shut down. This Directive is intended to preclude such a failure.\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":3,"scope_assessment":{"changed":false,"description":"The directive maintains its original scope: it targets engine power control cable attaching hardware on the specified SA226/SA227 models and requires corrective action to prevent failures that could cause engine shutdown. The instrument delegates the technical remedy to manufacturer service bulletins and imposes a single compliance window (Applicability; Requirement; Compliance; Background). There is no indication in the text that the scope has been expanded or narrowed from that stated purpose."},"complexity_factors":["Delegation of technical detail to external Fairchild Service Bulletins (Requirement) increases reliance on and need to access those documents.","Applicability covers multiple aircraft variants (10 listed models), requiring operators to determine which bulletin applies to their specific model (Applicability; Requirement).","Fixed compliance window tied to flight hours (100 hours after 25 April 1996) requires operational scheduling and tracking (Compliance).","Cross-reference to FAA AD introduces an additional external regulatory document to consider (Note).","Lack of explicit alternatives or cost estimates in the AD means operators must infer resource needs and downtime from the service bulletins (Requirement; Compliance).","Enforcement and practical implementation rest with maintenance organisations and operators, creating variability in how quickly and cheaply the work is completed (Requirement; Compliance)."],"plain_english_summary":"This directive requires owners/operators of specified Fairchild (Swearingen) SA226/SA227 models to carry out the manufacturer’s prescribed maintenance in the referenced Fairchild service bulletins within 100 flight hours after 25 April 1996. CASA issued it to prevent failures of engine power‑control cable attaching hardware (one failure caused an engine shutdown). Operators bear the cost and scheduling burden; maintenance organisations must perform the work per the service bulletins under CASA oversight."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific mechanical defect in specific aircraft models. It has not expanded beyond its original purpose of mandating inspection/replacement of engine power control cable hardware."},"complexity_factors":["Single, specific mechanical issue addressed","Only 3 referenced technical documents (service bulletins)","Simple compliance deadline (100 hours time-in-service)","No nested exceptions or conditional logic","Straightforward applicability list (10 aircraft variants)","No defined terms section or interpretive provisions"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for specific aircraft.\n\n**What it does:**\nOrders owners and operators of certain Fairchild (Swearingen) twin-turboprop aircraft to inspect and fix a potentially dangerous problem with the **engine power control cables**. These cables connect the pilot's throttle controls to the engines. If the hardware attaching these cables fails, the pilot could lose control of engine power — in one reported case, this caused an engine to shut down unexpectedly.\n\n**Who it affects:**\nOperators of specific Fairchild aircraft models: SA226-T, SA226-T(B), SA226-AT, SA226-TC, SA227-TT, SA227-AT, SA227-AC, SA227-BC, SA227-CC, and SA227-DC (these are the Metroliner and Merlin series commuter aircraft).\n\n**What must be done:**\nAircraft owners must follow specific manufacturer service bulletins (technical repair instructions) to inspect and replace the faulty cable hardware. The work must be completed within **100 hours of flight time** after 25 April 1996.\n\n**Why it matters:**\nThis prevents in-flight engine failures caused by mechanical defects. Non-compliance means the aircraft cannot legally fly — it's grounded until fixed."}},"importantCases":[],"_links":{"self":"/api/acts/ad-swsa226-77-engine-power-control-cable","history":"/api/acts/ad-swsa226-77-engine-power-control-cable/history","analysis":"/api/acts/ad-swsa226-77-engine-power-control-cable/analysis","conflicts":"/api/acts/ad-swsa226-77-engine-power-control-cable/conflicts","importantCases":"/api/acts/ad-swsa226-77-engine-power-control-cable/important-cases","documents":"/api/acts/ad-swsa226-77-engine-power-control-cable/documents"}}