{"id":"F2006B09803","name":"AD/F28/69 Amdt 1 - Ageing Aircraft Modifications","slug":"ad-f28-69-amdt-1-ageing-aircraft-modifications","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":54725,"registerId":"commonwealth-F2006B09803-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/F28/69 Amdt 1 - Ageing Aircraft Modifications","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)  Fokker F28 Series Aeroplanes\n\n \n\nAD/F28/69\n\nAmdt 1\n\n\nAgeing Aircraft Modifications 3/94\n\n \n\nApplicability: Model F28 aircraft (except Mk 0100), all serial numbers (as listed in Appendices I and II of the Requirement Document).\n\nRequirement: Action in accordance with the technical requirements of RLD AD 90-063/2 (A). Compliance:              As specified in the Requirement Document with a revised effective date of 3 March\n\n1994.\n\n \n\nBackground: The Country of Origin Airworthiness Authority requires terminating action in lieu of special repetitive inspections to ensure the continued structural integrity of older aircraft.\n\n \n\nAmendment 1 is issued in response to a revision of the relevant RLD AD which provides new incorporation threshold and applicability information.\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 standard amendment to an existing Airworthiness Directive. Amendment 1 simply updates compliance thresholds and applicability information based on revised guidance from the Dutch certifying authority. The scope remains tightly focused on ageing aircraft structural modifications for the Fokker F28 series, consistent with the original AD intent."},"complexity_factors":["Very short document (approximately 200 words)","Only 1 defined term implicitly referenced (the 'Requirement Document')","No nested conditional logic or exceptions","Single cross-reference to external technical document (RLD AD 90-063/2)","Straightforward applicability statement with one exclusion (Mk 0100 model)","No internal Part or section structure — flat, single-page format typical of Airworthiness Directives"],"plain_english_summary":"This CASA Airworthiness Directive requires owners and operators of specified Fokker F28 aircraft (excluding the Mk 0100) to implement permanent structural modifications — replacing repeated inspections — to mitigate ageing-related fatigue and cracking. It updates when those terminating actions must be done based on new information from the Dutch authority (RLD) and references RLD AD 90-063/2 (A); the revised compliance deadline is 3 March 1994."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"Amendment 1 updates the original AD by revising the incorporation threshold and applicability information, which changes which aircraft/serial numbers and when the terminating modification must be incorporated (Amendment 1; Applicability)."},"complexity_factors":["Cross-reference to a foreign/Country‑of‑Origin airworthiness directive (RLD AD 90‑063/2 (A)) requires technical conformity with external standards (Requirement).","Applicability is limited to specific models and serial numbers (except Mk 0100) listed in appendices, creating dependency on separate annexed lists (Applicability).","Replacement of repetitive inspections by a terminating modification changes maintenance planning and cost timing for operators (Requirement; Background).","Compliance timing is set by the Requirement Document with a revised effective date, so precise obligations depend on that document’s provisions (Compliance).","Amendment revises incorporation threshold and applicability, altering which aircraft or flight hours trigger mandatory action (Amendment 1).","Enforcement and oversight rest with the Civil Aviation Safety Authority; practical implementation requires operators to interpret multiple documents together (Compliance; Requirement)."],"plain_english_summary":"This directive requires owners/operators of Fokker F28 series aeroplanes (except Mk 0100), listed in the requirement‑document appendices, to implement ageing‑aircraft structural modifications specified in RLD AD 90‑063/2 (A). (Applicability; Requirement)\n\nIt replaces recurring special inspections with a terminating modification, sets a revised incorporation threshold and applicability, and fixes compliance timing per the Requirement Document (effective 3 March 1994). Operators pay for and schedule the work; the Civil Aviation Safety Authority enforces compliance. (Compliance; Amendment 1; Background)"}},"importantCases":[],"_links":{"self":"/api/acts/ad-f28-69-amdt-1-ageing-aircraft-modifications","history":"/api/acts/ad-f28-69-amdt-1-ageing-aircraft-modifications/history","analysis":"/api/acts/ad-f28-69-amdt-1-ageing-aircraft-modifications/analysis","conflicts":"/api/acts/ad-f28-69-amdt-1-ageing-aircraft-modifications/conflicts","importantCases":"/api/acts/ad-f28-69-amdt-1-ageing-aircraft-modifications/important-cases","documents":"/api/acts/ad-f28-69-amdt-1-ageing-aircraft-modifications/documents"}}