{"id":"F2006B04032","name":"AD/BEECH 55/86 - Magnesium Metal Bonded Elevator Assembly","slug":"ad-beech-55-86-magnesium-metal-bonded-elevator-assembly","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43641,"registerId":"commonwealth-F2006B04032-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.002.png)\n\n![](image.002.png)  \nFor the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.","sortOrder":0},{"sectionNumber":"AD/BEECH 55/86 Magnesium Metal Bonded El","sectionType":"part","heading":"AD/BEECH 55/86 Magnesium Metal Bonded Elevator Assembly","content":"# AD/BEECH 55/86 Magnesium Metal Bonded Elevator Assembly\n\nApplicability: Model Serial Number","sortOrder":1},{"sectionNumber":"13/2000","sectionType":"part","heading":"13/2000","content":"# AD/BEECH 55/86 Magnesium Metal Bonded Elevator Assembly\n\nApplicability: Model Serial Number\n\n#   \n13/2000","sortOrder":2}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":false,"description":"This appears to be a standard Airworthiness Directive maintaining its original scope — addressing a specific unsafe condition in particular aircraft components. No evidence of scope creep beyond the original aviation safety purpose."},"complexity_factors":["Multiple overlapping document identifiers (AD/BEECH 55/86, 13/2000) suggesting amendment history or reissue","Fragmentary content — full requirement and compliance sections not provided in extract","Technical aviation terminology requiring specialist knowledge (elevator assemblies, magnesium bonding, airworthiness)","Cross-references to Civil Aviation Regulations 1998 (subregulation 39.1(1))","Structured format with specific mandatory sections (Applicability, Requirement, Compliance, Background) but incomplete rendering in this extract"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by the Civil Aviation Safety Authority (CASA) for aircraft.\n\n**What it does:**\nThis directive requires specific safety actions to be taken on certain **Beechcraft aircraft elevators** (the control surfaces on the tail that make the plane go up and down). The problem involves **magnesium metal bonded elevator assemblies** — a particular construction method that has developed a safety issue.\n\n**Who it affects:**\n- Owners and operators of specific Beech aircraft models with affected serial numbers\n- Maintenance engineers and organisations servicing these aircraft\n- Anyone responsible for keeping these aircraft airworthy\n\n**What must happen:**\nThe directive mandates that affected elevators must be inspected, modified, or replaced according to specific instructions to correct an unsafe condition. The exact technical work required is set out in the \"requirement section\" (not fully shown here), and must be completed by deadlines in the \"compliance section.\"\n\n**Why it matters:**\nElevator failures can cause catastrophic loss of aircraft control. This AD prevents accidents by forcing operators to address a known structural or material defect before the aircraft can continue flying. Ignoring an AD is illegal — aircraft cannot be flown until compliance is achieved.\n\n**Key legal bits:**\n- Issued under **subregulation 39.1(1) of the Civil Aviation Regulations 1998** — this gives CASA the power to issue binding safety orders\n- The directive is legally enforceable; non-compliance means the aircraft is not airworthy"},"flash_summary":{"complexity_score":6,"scope_assessment":{"changed":false,"description":"No evidence in the supplied text indicates a change in scope from an earlier instrument or intent. The excerpt only shows the current AD structure and applicability (\"Model Serial Number 13/2000\"). The original or prior instrument (if any) and its scope are not provided, so a change cannot be demonstrated from the material supplied."},"complexity_factors":["Legal cross-reference to subregulation 39.1(1) of CAR 1998 which establishes statutory authority and requires checking external law for full context.","Dependence on separate sections (background, requirement, compliance) that are referenced but not included in the supplied text, creating ambiguity about substantive obligations.","Delegated discretion: the CASA delegate selects the corrective action, so the instrument's practical effect depends on that exercise of discretion.","Ambiguous/limited Applicability formatting in the excerpt (repetition of \"Model Serial Number 13/2000\") which raises questions about the precise set of affected aircraft.","Operational detail likely technical (magnesium bonded elevator assembly) is absent from the text provided, requiring technical documents to assess feasibility and cost.","Compliance consequences (timing, method, costs) are unspecified in the excerpt, which forces reliance on external documents for concrete implementation steps."],"plain_english_summary":"A CASA delegate, using subregulation 39.1(1) of CAR 1998, issues an Airworthiness Directive that requires the corrective actions set out in its requirement and compliance sections to address a stated unsafe condition. It applies only to the aircraft/product listed (here, the named model/serial number) and makes owners/operators responsible for carrying out and timing the work. The excerpt omits the substantive requirement and compliance details, so actual costs and operational impacts aren’t shown."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-55-86-magnesium-metal-bonded-elevator-assembly","history":"/api/acts/ad-beech-55-86-magnesium-metal-bonded-elevator-assembly/history","analysis":"/api/acts/ad-beech-55-86-magnesium-metal-bonded-elevator-assembly/analysis","conflicts":"/api/acts/ad-beech-55-86-magnesium-metal-bonded-elevator-assembly/conflicts","importantCases":"/api/acts/ad-beech-55-86-magnesium-metal-bonded-elevator-assembly/important-cases","documents":"/api/acts/ad-beech-55-86-magnesium-metal-bonded-elevator-assembly/documents"}}