{"id":"F2006B10930","name":"AD/JETSTREAM/6 - Inboard Wing Leading Edge Hydraulic Lines","slug":"ad-jetstream-6-inboard-wing-leading-edge-hydraulic-lines","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56474,"registerId":"commonwealth-F2006B10930-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/JETSTREAM/6 - Inboard Wing Leading Edge Hydraulic Lines","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/6 Inboard Wing Leading Edge Hydraulic Lines 8/85\n\nApplicability: All model Jetstream Series 3100 with S/Nos. 601 to 636. Requirement: British Aerospace SB29-JA840508 Rev. 1.\n\nCompliance: Within 300 flying hours from 31 AUGUST 1985.\n\n \n\nBackground: Chafing of the suction and pressure hydraulic lines in the inboard wing leading edge can result in complete hydraulic failure due to loss of fluid.\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, time-limited safety directive from 1985 addressing a specific mechanical defect in a specific aircraft batch. It has not expanded beyond its original purpose of mandating a one-time inspection/repair."},"complexity_factors":["Extremely short document — only 8 substantive lines","Zero defined terms in the document itself (relies on external aviation terminology)","Single, unambiguous compliance requirement with clear deadline","No cross-references to other legislation or regulations within the text","No conditional logic or exceptions — applies to all listed serial numbers without qualification","Refers to external technical document (Service Bulletin) but does not reproduce its contents"],"plain_english_summary":"This is an **Airworthiness Directive** — 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 British Aerospace Jetstream 3100 aeroplanes to inspect and fix a dangerous problem with hydraulic lines inside the wing.\n\n**Who it affects:**\n- **Aircraft:** All British Aerospace BAe 3100 (Jetstream) Series aeroplanes with serial numbers 601 through 636\n- **People:** Airlines, charter operators, and private owners flying these specific planes\n\n**The safety problem:**\nThe hydraulic lines (pipes carrying pressurised fluid that powers the aircraft's controls) in the inboard wing leading edge (the front part of the wing closest to the fuselage) are rubbing against something they shouldn't. This \"chafing\" (wearing away by friction) can wear holes in the lines, causing all hydraulic fluid to leak out. If that happens, the pilots could lose control of critical systems like flaps, landing gear, or flight controls.\n\n**What must be done:**\nOperators must follow **British Aerospace Service Bulletin SB29-JA840508 Revision 1** — a technical instruction from the manufacturer explaining exactly how to inspect and repair the lines.\n\n**When it must be done:**\nWithin 300 flying hours after 31 August 1985.\n\n**Why it matters:**\nHydraulic failure in flight can be catastrophic. This directive prevents accidents by forcing operators to fix a known design flaw before it causes an emergency."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive applies to a specific group of Jetstream Series 3100 aircraft (S/N 601–636) and mandates the manufacturer service bulletin be carried out within a fixed flying-hour window (Applicability; Requirement; Compliance). The text does not expand the affected population or add measures beyond the service-bulletin requirement set out here, so the scope has not been broadened relative to the instrument's stated content."},"complexity_factors":["Narrow applicability limited to Jetstream Series 3100 with serial numbers 601–636 (Applicability)","Single prescriptive external technical reference (British Aerospace SB29-JA840508 Rev. 1) rather than in-text technical steps (Requirement)","A single, short compliance window measured in flying hours from a fixed date (300 flying hours from 31 Aug 1985) (Compliance)","Technical nature of work (hydraulic-line inspection/repair) requires qualified maintenance personnel and possible aircraft downtime (Background; Requirement)","No additional procedural or administrative layering in the text (no alternative methods, no exemptions, no phased approach) (entire text)"],"plain_english_summary":"This airworthiness directive requires owners/operators of British Aerospace Jetstream Series 3100 aircraft (serials 601–636) to carry out the work specified in British Aerospace SB29-JA840508 Rev.1 within 300 flying hours from 31 August 1985. It’s mandated to address chafing of suction and pressure hydraulic lines that could cause hydraulic failure; affected operators must arrange and pay for the required maintenance within the short compliance window."}},"importantCases":[],"_links":{"self":"/api/acts/ad-jetstream-6-inboard-wing-leading-edge-hydraulic-lines","history":"/api/acts/ad-jetstream-6-inboard-wing-leading-edge-hydraulic-lines/history","analysis":"/api/acts/ad-jetstream-6-inboard-wing-leading-edge-hydraulic-lines/analysis","conflicts":"/api/acts/ad-jetstream-6-inboard-wing-leading-edge-hydraulic-lines/conflicts","importantCases":"/api/acts/ad-jetstream-6-inboard-wing-leading-edge-hydraulic-lines/important-cases","documents":"/api/acts/ad-jetstream-6-inboard-wing-leading-edge-hydraulic-lines/documents"}}