{"id":"F2006L00737","name":"AD/A330/56 - Wing Leading Edge Blow-Down Panels","slug":"ad-a330-56-wing-leading-edge-blow-down-panels","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":136760,"registerId":"commonwealth-F2006L00737-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Airbus Industrie A330 Series Aeroplanes","sectionType":"division","heading":"Airbus Industrie A330 Series Aeroplanes","content":"### Airbus Industrie A330 Series Aeroplanes\n\n| AD/A330/56 | Wing Leading Edge Blow-Down Panels | 4/2006 |\n| ---------- | ---------------------------------- | ------ |\n\n| Applicability: | All Model A330 aircraft; except aircraft with Airbus Service Bulletin (SB)A330-57-3091 embodied in service.This Directive is not applicable to aircraft on which all affected panel landing assemblies mentioned in SB A330-57-3091 have been replaced in accordance with:Modification 53383 or SB A330-57-3084.Modification 47249 or SB A330-57-3063.                                                                                                                                                                                                                           |\n| -------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the requirements of EASA AD 2006-0048.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |\n| Compliance:    | As specified in the Requirement document.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |\n|                | This Airworthiness Directive becomes effective on 13 April 2006.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |\n| Background:    | Several operators have reported the in-flight loss (full or partial) of leading edge blow-down panels at various positions along the wing. Investigation of the affected area revealed wear of the rivet slots, a complete shearing of the rivets or cracks on the horizontal flange of the landing angle. Analysis has concluded that the damage was related to wing vibration, wing bending affects and high aerodynamic uploads. The actions required by this Directive are intended to prevent loss of the blow-down panels and potential injury to personnel on the ground. |\n\n![](image.001.png)  \nDavid Punshon  \nDelegate of the Civil Aviation Safety Authority\n\n3 March 2006","sortOrder":0},{"sectionNumber":"AD/A330/56","sectionType":"part","heading":"AD/A330/56","content":"## AD/A330/56","sortOrder":1},{"sectionNumber":"Wing Leading Edge Blow-Down Panels","sectionType":"part","heading":"Wing Leading Edge Blow-Down Panels","content":"## Wing Leading Edge Blow-Down Panels","sortOrder":2},{"sectionNumber":"4/2006","sectionType":"part","heading":"4/2006","content":"## 4/2006","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a standard single-issue Airworthiness Directive addressing a specific mechanical failure mode (wing panel detachment). The scope remains tightly focused on the original safety concern without expansion into unrelated systems or operational requirements."},"complexity_factors":["Short, single-purpose directive (approximately 250 words of substantive content)","Only 4 defined applicability categories (all A330s, SB 3091 embodied, Mod 53383/SB 3084 replacement, Mod 47249/SB 3063 replacement)","Single cross-reference to external document (EASA AD 2006-0048) for actual technical requirements","No nested conditional logic or exceptions to exceptions — exemption criteria are clearly listed","Standard aviation regulatory format with predictable structure (Applicability/Requirement/Compliance/Background)"],"plain_english_summary":"This mandatory CASA Airworthiness Directive requires owners/operators of Airbus A330 aircraft to repair or inspect wing leading edge blow‑down panels after reports of panels detaching in flight due to rivet and flange failures from vibration and bending. It adopts the corrective actions in EASA AD 2006‑0048, applies to all A330s except aircraft already modified per specified service bulletins/kits, and took effect 13 April 2006."},"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":false,"description":"The directive adopts and enforces EASA AD 2006-0048 for A330 leading-edge blow-down panels while excluding aircraft already modified or with specified service bulletins (Applicability; Requirement). It therefore implements the referenced corrective scope rather than expanding or narrowing it beyond those stated exceptions."},"complexity_factors":["Cross-reference to an external mandatory document (EASA AD 2006-0048) requires operators to obtain and follow another authority's detailed procedures (Requirement).","Exception carve-outs for aircraft with particular service bulletins or modifications mean operators must check maintenance history to determine applicability (Applicability).","Technical causation involves rivet slot wear, sheared rivets and cracks from vibration, bending and aerodynamic loads, raising engineering judgement in inspections and repairs (Background).","The directive prescribes compliance but leaves the specific inspection/repair actions and timing to the referenced EASA AD, creating a dependency on another instrument for operational detail (Requirement; Compliance).","Potential operational cost and logistics for operators: inspections, corrective repairs or panel replacements (implied by Requirement and Applicability).","Effective date imposes a fixed compliance timeline (Directive becomes effective 13 April 2006), so planning and parts availability are time-sensitive (Compliance).","Enforcement and certification follow normal airworthiness directive channels; the instrument is issued by CASA's delegate, implying administrative oversight (signature/date)."],"plain_english_summary":"This Airworthiness Directive requires Airbus A330 operators to inspect and, where needed, repair or replace wing leading-edge blow-down panels per EASA AD 2006‑0048; it applies to all A330s except aircraft already modified or with specified service bulletins (Applicability) and took effect 13 April 2006. It responds to reports of in‑flight panel loss from rivet and structural wear linked to vibration, bending and aerodynamic loads; its aim is to prevent panel loss and injury on the ground (Background). Compliance timing and methods are in the referenced EASA AD (Requirement)."},"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-a330-56-wing-leading-edge-blow-down-panels","history":"/api/acts/ad-a330-56-wing-leading-edge-blow-down-panels/history","analysis":"/api/acts/ad-a330-56-wing-leading-edge-blow-down-panels/analysis","conflicts":"/api/acts/ad-a330-56-wing-leading-edge-blow-down-panels/conflicts","importantCases":"/api/acts/ad-a330-56-wing-leading-edge-blow-down-panels/important-cases","documents":"/api/acts/ad-a330-56-wing-leading-edge-blow-down-panels/documents"}}