{"id":"F2006B09780","name":"AD/F28/45 Amdt 5 - Structural Integrity Program","slug":"ad-f28-45-amdt-5-structural-integrity-program","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":54697,"registerId":"commonwealth-F2006B09780-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 revokes Airworthiness Directive (AD) AD/F28/45 Amdt 4 and issues the following 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/F28/45","sectionType":"part","heading":"AD/F28/45","content":"# AD/F28/45\n\nAmdt 5\n\nApplicability: All models.","sortOrder":1},{"sectionNumber":"Structural Integrity Program 5/2000","sectionType":"part","heading":"Structural Integrity Program 5/2000","content":"# AD/F28/45\n\nAmdt 5\n\nApplicability: All models.\n\n#   \nStructural Integrity Program 5/2000","sortOrder":2}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":false,"description":"This appears to be a routine amendment (Amendment 5) to an existing Airworthiness Directive. The scope remains consistent with the original AD/F28/45 — maintaining structural integrity of Fokker F28 aircraft through a mandatory inspection program. No evidence of scope creep beyond the original aviation safety purpose."},"complexity_factors":["Document is a fragment — only header, applicability, and title sections are visible; substantive requirements, compliance times, and background are referenced but not shown","Heavy use of cross-references to external documents (the 'Structural Integrity Program 5/2000' which is incorporated by reference but not reproduced)","Nested regulatory hierarchy: CAR 1998 → subregulation 39.1(1) → this AD → external technical program → likely further manufacturer documents","Amendment structure creates version control complexity (this is Amendment 5, revoking Amendment 4)","Dual applicability statement (repeated 'All models') suggests formatting or compilation error in the source"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** issued by the **Civil Aviation Safety Authority (CASA)** — Australia's aviation safety regulator. Think of it as a mandatory safety recall for aircraft.\n\n**What it does:**\n- **Revokes** (cancels) the previous version of this directive (Amendment 4)\n- **Issues** a new, updated version (Amendment 5)\n- Requires owners and operators of certain **Fokker F28 aircraft** to follow a **Structural Integrity Program** — a systematic inspection and maintenance plan designed to detect and fix structural problems before they cause accidents\n\n**Who it affects:**\n- Owners and operators of **all Fokker F28 aircraft models**\n- Maintenance organisations servicing these aircraft\n\n**Why it matters:**\nAircraft structures suffer from **metal fatigue** (tiny cracks that grow over time with repeated pressurisation cycles). Without regular, specific inspections, these cracks can lead to catastrophic failure. This directive mandates a structured program of checks to keep these ageing aircraft safe to fly.\n\n**Key sections explained:**\n- **Applicability:** Which aircraft are covered (all F28 models)\n- **Requirement:** What actions must be taken (follow the Structural Integrity Program)\n- **Compliance:** When these actions must be completed\n- **Background:** Why the directive was issued (explains the safety risk)\n\nThe directive is issued under **subregulation 39.1(1) of the Civil Aviation Regulations 1998** — the legal power that lets CASA issue binding safety orders."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The AD explicitly revokes the prior amendment (AD/F28/45 Amdt 4) and issues Amdt 5, but the applicability in the excerpt remains \"All models.\" Based on the text provided, the scope (the population to which the AD applies) does not appear to change. A definitive assessment of any substantive scope change in required actions cannot be made from this excerpt because the requirement and compliance sections (which contain the specific mandated measures and timings) are not included."},"complexity_factors":["Legal delegation: issued by a CASA delegate under subregulation 39.1(1) of CAR 1998 — requires understanding regulatory authority and delegated decision-making.","Cross-reference to prior instrument: revokes AD/F28/45 Amdt 4, so implementers must compare the new amendment with the previous one to identify changes.","Missing substantive content in excerpt: the actual technical \"requirement\" and \"compliance\" sections (which specify actions and timings) are not included, forcing reliance on cross-references.","Broad applicability statement: \"All models\" is wide in scope and requires operators to determine whether their specific aircraft/parts fall within the AD's technical coverage.","Technical nature: implied maintenance/inspection/repair tasks (Structural Integrity Program) are technical and require specialist interpretation and costly actions by operators/maintainers."],"plain_english_summary":"This instrument revokes AD/F28/45 Amdt 4 and issues AD/F28/45 Amdt 5 under subregulation 39.1(1) of CAR 1998, titled \"Structural Integrity Program 5/2000\", and applies to all models. It mandates the corrective actions and compliance timings set out in the AD to address an identified unsafe condition.\n\nOperators, owners and maintainers of the affected aircraft must carry out the prescribed inspections, repairs or modifications and bear the associated operational and financial costs. Specific technical steps and deadlines are in the AD’s requirement and compliance sections."}},"importantCases":[],"_links":{"self":"/api/acts/ad-f28-45-amdt-5-structural-integrity-program","history":"/api/acts/ad-f28-45-amdt-5-structural-integrity-program/history","analysis":"/api/acts/ad-f28-45-amdt-5-structural-integrity-program/analysis","conflicts":"/api/acts/ad-f28-45-amdt-5-structural-integrity-program/conflicts","importantCases":"/api/acts/ad-f28-45-amdt-5-structural-integrity-program/important-cases","documents":"/api/acts/ad-f28-45-amdt-5-structural-integrity-program/documents"}}