{"id":"F2006L01104","name":"AD/CONVAIR/3 - Supplemental Corrosion Inspection Program","slug":"ad-convair-3-supplemental-corrosion-inspection-program","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":58457,"registerId":"commonwealth-F2006L01104-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Kelowna Flightcraft (General Dynamics/Co","sectionType":"division","heading":"Kelowna Flightcraft (General Dynamics/Convair) Series Aeroplanes","content":"### Kelowna Flightcraft (General Dynamics/Convair) Series Aeroplanes\n\n| AD/CONVAIR/3 | Supplemental Corrosion Inspection Program | 5/2006 |\n| ------------ | ----------------------------------------- | ------ |\n\n| Applicability: | All Model 340, 440, and all such model aircraft converted to turbopropeller power.                                                                                                                                                                                                                                                                                                                                                 |\n| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Inspect in accordance with General Dynamics, Convair Division, “Supplemental Corrosion Inspection Document”, Document No. ZS-340-2000, dated February 1992.If corrosion is detected as a result of any inspection required by this Directive, before further flight, repair in accordance with General Dynamics/Convair Structural Repair Manual.Note: FAA AD 92-25-13 Amdt 39-8427 refers.                                        |\n| Compliance:    | From the initial threshold specified in FAA AD 92-25-13, and not to exceed the applicable interval specified in the “initial” column of the schedule on pages 5-10-1 through 5-10-6 of Chapter 5 of the Requirement document. Thereafter repeat the inspections at intervals not to exceed the applicable interval specified in the “Follow-on” column of the schedule on pages 5-10-1 through 5-10-6 of the Requirement document. |\n|                | This Airworthiness Directive becomes effective on 11 May 2006.                                                                                                                                                                                                                                                                                                                                                                     |\n| Background:    | The FAA requires certain inspections to prevent degradation of the structural capabilities of the aircraft due to problems associated with corrosion.                                                                                                                                                                                                                                                                              |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n29 March 2006","sortOrder":0},{"sectionNumber":"AD/CONVAIR/3","sectionType":"part","heading":"AD/CONVAIR/3","content":"## AD/CONVAIR/3","sortOrder":1},{"sectionNumber":"Supplemental Corrosion Inspection Progra","sectionType":"part","heading":"Supplemental Corrosion Inspection Program","content":"## Supplemental Corrosion Inspection Program","sortOrder":2},{"sectionNumber":"5/2006","sectionType":"part","heading":"5/2006","content":"## 5/2006","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"This directive adopts and enforces an existing supplemental corrosion inspection programme for the specified Convair types, aligning with the FAA AD cited (FAA AD 92-25-13) and the General Dynamics inspection and repair documents. It does not expand the class of aircraft affected or add new regulatory objectives beyond requiring inspections and repairs per the referenced materials; therefore it does not appear to have grown beyond its original safety-focused purpose."},"complexity_factors":["Single-purpose Airworthiness Directive of short length","Direct applicability to a narrow set of aircraft types (Models 340, 440 and turboprop conversions)","Cross-references to external technical documents: General Dynamics Document No. ZS-340-2000 (Feb 1992) and the General Dynamics/Convair Structural Repair Manual","Cross-reference to FAA AD 92-25-13 for initial inspection thresholds","Schedule references to specific pages (5-10-1 through 5-10-6) in the Requirement document for interval details","Simple, prescriptive requirement to repair before further flight (no conditional enforcement language)","No large number of defined terms or nested exceptions"],"plain_english_summary":"**What this directive does (mechanically)**\n\n- Requires owners/operators of all Convair/Kelowna Flightcraft Model 340 and 440 aeroplanes (including those converted to turboprop power) to carry out corrosion inspections following General Dynamics, Convair Division, \"Supplemental Corrosion Inspection Document\", Document No. ZS-340-2000, dated February 1992. (See: Requirement / Applicability.)\n- If any corrosion is found during those inspections, the aircraft must be repaired before it is flown again, using the General Dynamics/Convair Structural Repair Manual. (See: Requirement.)\n- The timing for the first inspection and the repeat intervals are set by reference to the thresholds in FAA AD 92-25-13 and to the \"initial\" and \"follow-on\" interval columns in the schedule on pages 5-10-1 through 5-10-6 of the Requirement document. Inspections must be done no later than those applicable intervals. (See: Compliance.)\n- The directive took effect on 11 May 2006. (See: Compliance / Effective date.)\n\n**Who this affects**\n\n- Aircraft owners, operators, and maintenance organisations responsible for Convair/Kelowna Flightcraft Model 340 and 440 aeroplanes (and turboprop conversions) registered in Australia. Maintenance personnel must follow the specified inspection and repair documents.\n\n**Why it matters (stated purpose and operational effect)**\n\n- Stated purpose: to prevent structural degradation caused by corrosion by ensuring periodic inspection and repair. (Background and Requirement.)\n\n**Practical effects, incentives and trade-offs**\n\n- Who pays: owners/operators pay for inspections, possible corrective repairs, and the aircraft downtime required to perform them (Applicability / Requirement / Compliance).\n- Who decides: the regulator mandates the inspection standard and intervals; the owner/operator schedules and funds the inspections; licensed maintenance organisations carry them out and certify repairs per the structural repair manual (Requirement / Compliance).\n- Behaviour change required: implement a maintenance schedule matching the referenced document and FAA thresholds; stop flying following detection of corrosion until repairs are completed (Requirement).\n- Compliance burden: the directive is prescriptive and references external technical documents and specific schedule pages; complying requires access to those documents, qualified maintenance personnel, and potentially parts and structural repair capability (Requirement / Compliance).\n- Trade-offs: increased maintenance costs and aircraft downtime versus reduced risk of in‑flight structural failure and preserved airworthiness. Operators may choose to retire or sell aircraft instead of investing in repeated heavy corrosion repairs if costs are high.\n- Market effects: the directive raises operating costs for affected aircraft types. That can affect ticket/pricing decisions for commercial operators or the economic viability of continuing to operate older Convair types, possibly reducing supply of those services. Maintenance businesses with capability to perform the mandated inspections/repairs capture the work (concentrated benefit to maintenance providers; cost concentrated on owners/operators).\n- Implementation risk: effectiveness depends on operator compliance and availability of qualified maintenance resources and parts. The AD itself is prescriptive—there is little regulatory discretion in how to carry out the inspections beyond following the referenced documents.\n\n**Concentrated benefits and diffuse costs**\n\n- Concentrated benefits accrue to safety stakeholders (airworthiness regulators, passengers, insurers) and to maintenance providers who perform the work. Costs are concentrated on the relatively small group of operators who still use these older Convair models, rather than spread across a broad population.\n\n**Substitution and unintended consequences to watch for**\n\n- Operators may substitute by withdrawing aircraft from service, selling them, or converting them to roles with lower-utilisation rather than funding recurring corrosion repairs. That may shift maintenance and operational burdens elsewhere (e.g., to purchasers or secondary-market operators).\n\n(References in parentheses refer to the headings of the directive: Applicability, Requirement, Compliance, Background.)"},"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard Airworthiness Directive with narrow, specific scope. It addresses exactly what the title suggests — supplemental corrosion inspections for a specific aircraft type. No scope creep detected."},"complexity_factors":["Single, specific requirement (corrosion inspection) with clear reference to external technical document","Only 3 defined aircraft models in applicability section","Straightforward compliance structure: initial inspection deadline + recurring intervals","No nested exceptions or conditional logic — either you inspect and repair, or you don't fly","Cross-reference to only one external FAA directive (AD 92-25-13) for timing details","Total length is approximately 200 words of substantive content"],"plain_english_summary":"This AD requires owners/operators and maintenance organisations of Convair 340/440 (including turboprop conversions) in Australia to carry out mandatory, periodic corrosion inspections using the General Dynamics inspection manual and to ground aircraft until repairs per the Structural Repair Manual are completed. It targets ageing airframes at risk of structural failure, aligns with an FAA safety finding, and makes non‑compliance grounds for prohibition from flight."}},"importantCases":[],"_links":{"self":"/api/acts/ad-convair-3-supplemental-corrosion-inspection-program","history":"/api/acts/ad-convair-3-supplemental-corrosion-inspection-program/history","analysis":"/api/acts/ad-convair-3-supplemental-corrosion-inspection-program/analysis","conflicts":"/api/acts/ad-convair-3-supplemental-corrosion-inspection-program/conflicts","importantCases":"/api/acts/ad-convair-3-supplemental-corrosion-inspection-program/important-cases","documents":"/api/acts/ad-convair-3-supplemental-corrosion-inspection-program/documents"}}