{"id":"F2008L01624","name":"AD/DA42/4 - Wing Stub Safety Walkway","slug":"ad-da42-4-wing-stub-safety-walkway","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":73869,"registerId":"commonwealth-F2008L01624-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Diamond DA42 Series Aeroplanes","sectionType":"division","heading":"Diamond DA42 Series Aeroplanes","content":"### Diamond DA42 Series Aeroplanes\n\n| AD/DA42/4 | Wing Stub Safety Walkway | 6/2008 |\n| --------- | ------------------------ | ------ |\n\n| Applicability: | Model DA 42 aircraft, serial number 42.004 and subsequent.                                                                                                                                                                                                                     |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement:   | Action in accordance with the requirements of CAA AD A-2005-003.Note: Austrian CAA AD A-2005-003 supersedes CAA AD A-2005-001R1.                                                                                                                                               |\n| Compliance:    | Unless already accomplished, before 30 June 2008.Note: CAA AD A-2005-003 was issued 21 October 2005, and aircraft manufactured 2006 or later should not be affected.                                                                                                           |\n|                | This Airworthiness Directive becomes effective on 5 June 2008.                                                                                                                                                                                                                 |\n| Background:    | The manufacturer has determined that the surface roughness of the wing stub safety walkway Series 300, grey colour (equals sandpaper grit 40), installed during production on some aircraft serial numbers, can adversely affect the aircraft single engine climb performance. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n21 April 2008","sortOrder":0},{"sectionNumber":"AD/DA42/4","sectionType":"part","heading":"AD/DA42/4","content":"## AD/DA42/4","sortOrder":1},{"sectionNumber":"Wing Stub Safety Walkway","sectionType":"part","heading":"Wing Stub Safety Walkway","content":"## Wing Stub Safety Walkway","sortOrder":2},{"sectionNumber":"6/2008","sectionType":"part","heading":"6/2008","content":"## 6/2008","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"This instrument adopts the corrective requirements of Austrian CAA AD A-2005-003 for DA42 serials 42.004+, targeting wing-stub walkway roughness that can impair single-engine climb. It does not expand applicability beyond those serials and notes 2006-built aircraft are likely unaffected; therefore scope remains aligned with the original corrective aim rather than changed or broadened."},"complexity_factors":["Narrow applicability — only Model DA42, serial number 42.004 and subsequent (Applicability).","Cross-reference to a foreign airworthiness directive (Austrian CAA AD A-2005-003) rather than setting an independent domestic remedy (Requirement).","Technical metric referenced (surface roughness ~ sandpaper grit 40) requires technical inspection/repair capability (Background).","Fixed compliance deadline and effective date create a time-bound compliance burden (Compliance; effective 5 June 2008; comply by 30 June 2008).","Note qualifying which aircraft likely unaffected (manufactured 2006 or later), creating potential evidentiary/records checks to establish applicability (Compliance).","Supersession detail (A-2005-003 supersedes A-2005-001R1) may require checking historical ADs and records for correct corrective action (Requirement).","Costs and responsibility fall to operators/owners to implement the corrective action and demonstrate compliance (Requirement; Compliance)."],"plain_english_summary":"Requires operators of Diamond DA42 aeroplanes (serial 42.004 and later) to carry out the corrective actions set out in Austrian CAA AD A-2005-003; operators bear the compliance costs. The work fixes overly rough wing-stub safety walkway surfaces (noted as sandpaper grit 40) that can reduce single-engine climb performance and must be done by 30 June 2008 (effective 5 June 2008); aircraft manufactured in 2006 or later are likely unaffected."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow Airworthiness Directive addressing a specific manufacturing defect in a specific aircraft type. It has not expanded beyond its original safety purpose."},"complexity_factors":["Very short document (under 300 words)","Only 1 defined applicability criterion (serial number 42.004+)","Single requirement referencing external document (Austrian CAA AD A-2005-003)","Simple compliance deadline with one exception note","No nested conditions, cross-references to other Australian legislation, or procedural subsections","Background explanation is straightforward technical description"],"plain_english_summary":"Owners/operators of Diamond DA42 aircraft (serial no. 42.004 and up) must inspect and, if needed, remediate the wing stub safety walkway. Some aircraft were fitted with an excessively rough non‑skid surface, increasing drag and degrading single‑engine climb performance.\n\nThis AD adopts Austrian CAA AD A‑2005‑003; affected aircraft must comply before 30 June 2008 (unless already corrected)."},"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"}},"importantCases":[],"_links":{"self":"/api/acts/ad-da42-4-wing-stub-safety-walkway","history":"/api/acts/ad-da42-4-wing-stub-safety-walkway/history","analysis":"/api/acts/ad-da42-4-wing-stub-safety-walkway/analysis","conflicts":"/api/acts/ad-da42-4-wing-stub-safety-walkway/conflicts","importantCases":"/api/acts/ad-da42-4-wing-stub-safety-walkway/important-cases","documents":"/api/acts/ad-da42-4-wing-stub-safety-walkway/documents"}}