{"id":"F2006B10932","name":"AD/JETSTREAM/61 Amdt 2 - Wing/Fuselage Attachment","slug":"ad-jetstream-61-amdt-2-wing-fuselage-attachment","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56477,"registerId":"commonwealth-F2006B10932-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/JETSTREAM/61 Amdt 2 - Wing/Fuselage Attachment","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nBritish Aerospace BAe 3100 (Jetstream) Series Aeroplanes\n\nAD/JETSTREAM/61\n\nAmdt 2\n\n  \nWing/Fuselage Attachment 2/95\n\nApplicability: Model HP137 Mk1, Jetstream Series 200, and Jetstream Series 3100 aircraft.\n\nRequirement: Action in accordance with British Aerospace Mandatory Service Bulletin 57-JA 930941 Revision 2.\n\nCompliance: As specified in the requirement document with an effective date of 2 February 1995\\. Background: Cracks and corrosion on the spigot housing plate at the wing/fuselage forward-\n\nattachment sliding-joint, have been reported on an in-service Jetstream 3100 aircraft. Amendment 1 split the inspection of the spigot from the inspection of the spigot housing plate in order to ease operator workload, and added new compliance instructions for repeat inspections.\n\nAmendment 2 is issued in response to a revision of the Requirement document which introduces several changes including an optional ultrasonic test and an extension of compliance.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"The legislation maintains its original narrow scope: mandating specific structural inspections on particular aircraft models. The amendments refine implementation details (inspection methods, timing) without expanding the directive's fundamental purpose or applicability."},"complexity_factors":["Short, single-purpose directive (approximately 200 words)","Only 3 defined applicability criteria (specific aircraft models)","Single primary requirement referencing an external technical document","Minimal conditional logic — essentially 'inspect as per bulletin X'","Two amendments tracked, but changes are straightforward (added testing option, extended deadline)","No nested definitions or cross-references to other legislation sections"],"plain_english_summary":"This is an **Airworthiness Directive** — essentially a mandatory safety order for aircraft owners and operators. It applies to specific British Aerospace Jetstream aircraft models (HP137 Mk1, Series 200, and Series 3100).\n\n**What it does:**\n- Requires owners/operators to inspect the **wing/fuselage attachment point** — the critical joint where the wing connects to the body of the plane\n- Specifically looks for **cracks and corrosion** on the \"spigot housing plate\" (a metal component in that joint)\n- Mandates following a specific British Aerospace technical bulletin (Service Bulletin 57-JA 930941 Revision 2)\n\n**Why it matters:**\n- Cracks or corrosion at the wing attachment point could lead to **structural failure** — potentially catastrophic in flight\n- The directive was updated twice:\n  - **Amendment 1** made inspections easier by separating two checks and adding repeat inspection schedules\n  - **Amendment 2** adds an optional ultrasonic testing method and gives operators more time to comply\n\n**Who must comply:**\n- Anyone operating the affected Jetstream models in Australia\n- Compliance is legally mandatory under Civil Aviation Regulations\n\n**Bottom line:** This is a safety-critical maintenance requirement designed to catch dangerous wear before it causes an accident."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"Yes. The directive retains the same model applicability (HP137 Mk1, Jetstream Series 200 and 3100) but changes compliance mechanics: Amendment 1 separated inspection items and added repeat-inspection rules, and Amendment 2 revises the Requirement document by adding an optional ultrasonic test and extending the compliance period (see Applicability and Amendment 2 statements). These amendments alter inspection methods, timing and operator workload rather than expanding the set of affected aircraft."},"complexity_factors":["Technical nature of defect (cracks and corrosion at spigot housing plate at wing/fuselage forward-attachment sliding-joint).","Requirement relies on an external document: British Aerospace Mandatory Service Bulletin 57-JA 930941 Revision 2 for procedural detail and compliance timing.","Amendment history: Amendment 1 separated spigot and spigot housing plate inspections and added repeat inspection instructions; Amendment 2 introduces an optional ultrasonic test and extends compliance, creating multiple compliance paths.","Operational impact: affects routine inspection schedules and creates potential for repeat inspections, altering operator workload.","Equipment/personnel requirements: optional ultrasonic (NDT) testing may require specialised equipment and trained technicians.","Limited applicability to specific aircraft models (HP137 Mk1, Jetstream Series 200 and 3100) narrows regulatory reach but concentrates compliance on operators of those types."],"plain_english_summary":"This airworthiness directive requires operators of British Aerospace Jetstream HP137 Mk1, Series 200 and Series 3100 aeroplanes to carry out inspections and any corrective action on the wing/fuselage forward‑attachment sliding‑joint in accordance with British Aerospace Mandatory Service Bulletin 57‑JA 930941 Revision 2 (effective 2 Feb 1995). It responds to reported cracks and corrosion of the spigot housing plate; Amendment 2 adds an optional ultrasonic test and extends the compliance time, changing inspection method and scheduling and affecting operator maintenance costs."}},"importantCases":[],"_links":{"self":"/api/acts/ad-jetstream-61-amdt-2-wing-fuselage-attachment","history":"/api/acts/ad-jetstream-61-amdt-2-wing-fuselage-attachment/history","analysis":"/api/acts/ad-jetstream-61-amdt-2-wing-fuselage-attachment/analysis","conflicts":"/api/acts/ad-jetstream-61-amdt-2-wing-fuselage-attachment/conflicts","importantCases":"/api/acts/ad-jetstream-61-amdt-2-wing-fuselage-attachment/important-cases","documents":"/api/acts/ad-jetstream-61-amdt-2-wing-fuselage-attachment/documents"}}