{"id":"F2006B03404","name":"AD/B767/50 - Leading Edge Slat Torque Tube Fittings","slug":"ad-b767-50-leading-edge-slat-torque-tube-fittings","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42945,"registerId":"commonwealth-F2006B03404-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B767/50 - Leading Edge Slat Torque Tube Fittings","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)  Boeing 767 Series Aeroplanes\n\n \n\nAD/B767/50 Leading Edge Slat Torque Tube Fittings 2/91\n\nTX\n\n \n\nApplicability: Model 767 aircraft with line numbers 001 through 340.\n\n \n\nRequirement: Action in accordance with the technical requirements of FAA Telegraphic AD/T90/26/51.\n\n \n\nNote: Boeing Alert SB 767-27A0110 dated 13 December 1990 refers.\n\n \n\nCompliance: As specified in the Requirement document with the effective date 14 December 1990. Background:              Country of Origin Telegraphic AD.\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":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The source gives no indication that the scope deviates from an original intent. The directive applies to Model 767 aircraft line numbers 001–340 and requires compliance with FAA Telegraphic AD/T90/26/51 as of 14 December 1990. There is no statement in the text that the applicability or required actions have been narrowed or broadened relative to an earlier or original version."},"complexity_factors":["Short, procedural instrument that primarily cross‑references another authority (FAA Telegraphic AD/T90/26/51) rather than containing detailed technical requirements.","Applicability is narrowly defined (Model 767, line numbers 001–340) which reduces interpretive scope but requires aircraft‑by‑aircraft application checks.","Dependence on external documents (FAA AD and Boeing Alert Service Bulletin) creates operational complexity for implementers who must obtain and interpret those documents.","Lack of in‑text specification of costs, enforcement mechanisms, timing thresholds, or alternative compliance paths increases reliance on secondary sources for full compliance planning."],"plain_english_summary":"This directive makes compliance with FAA Telegraphic AD/T90/26/51 mandatory for Boeing Model 767 aeroplanes (line numbers 001–340), addressing leading‑edge slat torque‑tube fittings, with the compliance date set by the FAA AD (effective 14 December 1990). The instrument only cross‑references the FAA AD (and a Boeing service bulletin) and does not reproduce technical steps, costs, enforcement details, or alternative compliance information."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow airworthiness directive focused on a specific mechanical component on specific aircraft. It has not expanded beyond its original safety purpose."},"complexity_factors":["Extremely short document (under 200 words)","No defined terms section — relies entirely on external FAA document for technical requirements","Single, clear applicability criterion (line numbers 001-340)","No nested conditions or exceptions within the text itself","Cross-reference to external technical document means complexity is offloaded to FAA AD, not contained here"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order for aircraft. It applies to specific **Boeing 767 aeroplanes** (those built with line numbers 001 through 340, which are early production models).\n\n**What it does:**\n- Requires owners/operators to inspect or fix **leading edge slat torque tube fittings** — these are mechanical components that help control the slats (movable surfaces on the front of the wings that extend during takeoff and landing to improve lift).\n- The actual technical work required is set out in a separate **FAA (US aviation regulator) document** referenced as \"Telegraphic AD/T90/26/51\" — essentially, Australia is adopting the American safety requirement.\n\n**Who it affects:**\n- Airlines or operators flying early-model Boeing 767s in Australia.\n- Maintenance engineers responsible for keeping these aircraft airworthy.\n\n**Why it matters:**\n- Faulty torque tube fittings could potentially affect the operation of the slats, which are critical for safe takeoff and landing performance. This directive ensures potential defects are addressed before they become safety risks.\n\n**Key point:** This is a **cross-adoption** — rather than writing its own technical rules, Australia's Civil Aviation Safety Authority (CASA) is saying \"follow the FAA's instructions\" with a compliance deadline of 14 December 1990."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b767-50-leading-edge-slat-torque-tube-fittings","history":"/api/acts/ad-b767-50-leading-edge-slat-torque-tube-fittings/history","analysis":"/api/acts/ad-b767-50-leading-edge-slat-torque-tube-fittings/analysis","conflicts":"/api/acts/ad-b767-50-leading-edge-slat-torque-tube-fittings/conflicts","importantCases":"/api/acts/ad-b767-50-leading-edge-slat-torque-tube-fittings/important-cases","documents":"/api/acts/ad-b767-50-leading-edge-slat-torque-tube-fittings/documents"}}