{"id":"F2006B10892","name":"AD/JETSTREAM/24 - Propeller Feather Controls","slug":"ad-jetstream-24-propeller-feather-controls","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56426,"registerId":"commonwealth-F2006B10892-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/JETSTREAM/24 - Propeller Feather Controls","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)  British Aerospace BAe 3100 (Jetstream) Series Aeroplanes\n\n \n\nAD/JETSTREAM/24 Propeller Feather Controls 6/88\n\nApplicability: All Jetstream 3100 series aircraft.\n\n \n\nRequirement: Action in accordance with BAe ASB 76-A-JA880440. Compliance:  As per requirement document.\n\nBackground:  The manufacturer has advised that incorrect propeller control rigging has caused feathering difficulty during emergency engine shut down.\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":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific mechanical defect in a specific aircraft type. It has not expanded beyond its original purpose of mandating a particular maintenance action."},"complexity_factors":["Single, specific technical requirement referencing an external manufacturer document","No defined terms section — uses plain technical language","No conditional logic or nested exceptions","Extremely short (under 200 words of substantive content)","Single applicability criterion (aircraft series)"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA).\n\n**What it does:**\nRequires owners and operators of British Aerospace BAe 3100 (Jetstream) aircraft to inspect and fix a specific problem with the propeller feather controls.\n\n**The safety issue:**\nThe manufacturer discovered that some aircraft had their propeller controls incorrectly \"rigged\" (adjusted/connected). This made it difficult for pilots to \"feather\" the propeller during an emergency engine shutdown. \"Feathering\" means turning the propeller blades so they cut through the air with minimal resistance — crucial for safety when an engine fails, as it prevents the windmilling propeller from causing drag and further damage.\n\n**Who must act:**\nAnyone who owns or operates a Jetstream 3100 series aircraft.\n\n**What they must do:**\nFollow the manufacturer's Service Bulletin (BAe ASB 76-A-JA880440) to correct the rigging. The exact deadline and method are set out in that document.\n\n**Why it matters:**\nIf pilots can't feather the propeller during an engine failure, the aircraft becomes harder to control and may not be able to maintain altitude or reach a safe landing site."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD, as supplied, requires actions for all Jetstream 3100 series aircraft by reference to BAe ASB 76-A-JA880440 to address incorrect propeller control rigging that caused feathering difficulty. The directive’s scope aligns with that stated purpose and does not indicate any change from the original expressed intent within the provided text (Applicability; Requirement; Background)."},"complexity_factors":["Direct reference to an external technical document (BAe ASB 76-A-JA880440) rather than containing procedural detail itself (Requirement).","Universal applicability to a specific fleet (all Jetstream 3100 series aircraft) means many individual operators must act, but the rule is uniform (Applicability).","Safety-critical subject matter (propeller feathering during emergency shutdown) increases implementation importance but not the textual complexity of the AD (Background).","AD provides no timing, interval, or cost estimates — implementers must consult the ASB and their maintenance organisations, adding procedural steps and potential coordination complexity (Requirement).","Limited regulatory discretion visible in the text: the AD mandates compliance with the ASB but does not set enforcement details or exemptions in the text supplied."],"plain_english_summary":"The AD requires owners/operators of British Aerospace Jetstream 3100 series aircraft to carry out the maintenance/inspection actions set out in BAe ASB 76-A-JA880440, as issued by CASA, because incorrect propeller control rigging has caused difficulty feathering during engine shutdowns. Operators bear the compliance costs and must obtain and apply the BAe service bulletin, since the AD delegates technical procedures to that manufacturer document."}},"importantCases":[],"_links":{"self":"/api/acts/ad-jetstream-24-propeller-feather-controls","history":"/api/acts/ad-jetstream-24-propeller-feather-controls/history","analysis":"/api/acts/ad-jetstream-24-propeller-feather-controls/analysis","conflicts":"/api/acts/ad-jetstream-24-propeller-feather-controls/conflicts","importantCases":"/api/acts/ad-jetstream-24-propeller-feather-controls/important-cases","documents":"/api/acts/ad-jetstream-24-propeller-feather-controls/documents"}}