{"id":"F2006L00427","name":"AD/DO 328/49 - Cockpit Seat Belt Buckle Centre Screw","slug":"ad-do-328-49-cockpit-seat-belt-buckle-centre-screw","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":117099,"registerId":"commonwealth-F2006L00427-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Dornier 328 Series Aeroplanes","sectionType":"division","heading":"Dornier 328 Series Aeroplanes","content":"### Dornier 328 Series Aeroplanes\n\n| AD/DO 328/49 | Cockpit Seat Belt Buckle Centre Screw | 3/2006 |\n| ------------ | ------------------------------------- | ------ |\n\n| Applicability: | All Model 328-100 aircraft, equipped with ARC cockpit seat restraint system part number 1180002-403-100 serial numbers 0101 through 0315, 0328, and 0329.                                                                                                            |\n| -------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with LBA AD 97-001.Note: Dornier Service Bulletin No. 328-25-196 refers.                                                                                                                                                                        |\n| Compliance:    | Before 31 March 2006, unless already accomplished.                                                                                                                                                                                                                   |\n|                | This Airworthiness Directive becomes effective on 16 March 2006.                                                                                                                                                                                                     |\n| Background:    | The manufacturer has determined that the centre fixing screw of the cockpit seat belt release buckle may have become contaminated during assembly, preventing the securing loctite from curing. Loosening of the screw could cause the buckle to become inoperative. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n30 January 2006","sortOrder":0},{"sectionNumber":"AD/DO 328/49","sectionType":"part","heading":"AD/DO 328/49","content":"## AD/DO 328/49","sortOrder":1},{"sectionNumber":"Cockpit Seat Belt Buckle Centre Screw","sectionType":"part","heading":"Cockpit Seat Belt Buckle Centre Screw","content":"## Cockpit Seat Belt Buckle Centre Screw","sortOrder":2},{"sectionNumber":"3/2006","sectionType":"part","heading":"3/2006","content":"## 3/2006","sortOrder":3}],"analysis":{"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, narrow Airworthiness Directive addressing a specific manufacturing defect in a specific aircraft part. It has not expanded beyond its original safety purpose."},"complexity_factors":["Very short document (under 300 words)","Only 1 defined applicability criterion (specific part and serial numbers)","Single requirement referencing external documents (LBA AD 97-001 and Dornier Service Bulletin)","No nested exceptions or conditional logic","Simple compliance deadline structure","No cross-references to other legislation or complex procedural steps within the text itself"],"plain_english_summary":"This AD mandates inspection and corrective action on certain ARC cockpit seat-belt release buckles installed on Dornier 328-100 aircraft because manufacturing contamination prevented Loctite from curing, risking screw loosening and buckle failure. Affected operators must follow LBA AD 97‑001 and Dornier Service Bulletin 328‑25‑196 and complete the fix by 31 March 2006."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive targets a specific safety defect for a defined subset of Dornier 328-100 aircraft by part and serial number. The instrument limits its reach to those affected units and specifies remedial action via the referenced LBA AD; there is no indication within the text that it broadens or narrows scope beyond that original, targeted intent."},"complexity_factors":["Narrow applicability: specific model (328-100) and discrete serial numbers for the ARC restraint unit (Applicability).","Relies on an external corrective document (LBA AD 97-001) rather than spelling out the procedure in full (Requirement).","Short, fixed compliance window and effective date that operators must meet (Compliance: effective 16 Mar 2006; due 31 Mar 2006).","Technical nature of the defect (contamination preventing loctite cure) requiring inspection/repair skills and possible parts handling (Background).","Compliance cost and operational disruption fall on operators/maintainers who must locate affected serial-numbered units and perform the mandated action."],"plain_english_summary":"This Airworthiness Directive requires operators of certain Dornier 328-100 aeroplanes fitted with ARC cockpit seat restraint P/N 1180002-403-100 (serials 0101–0315, 0328–0329) to carry out corrective action specified in LBA AD 97-001 to secure the centre fixing screw of the cockpit seat belt release buckle. CASA set the directive effective 16 March 2006 with compliance due by 31 March 2006 because contamination may have prevented loctite curing and allowed the screw to loosen, risking buckle inoperation."}},"importantCases":[],"_links":{"self":"/api/acts/ad-do-328-49-cockpit-seat-belt-buckle-centre-screw","history":"/api/acts/ad-do-328-49-cockpit-seat-belt-buckle-centre-screw/history","analysis":"/api/acts/ad-do-328-49-cockpit-seat-belt-buckle-centre-screw/analysis","conflicts":"/api/acts/ad-do-328-49-cockpit-seat-belt-buckle-centre-screw/conflicts","importantCases":"/api/acts/ad-do-328-49-cockpit-seat-belt-buckle-centre-screw/important-cases","documents":"/api/acts/ad-do-328-49-cockpit-seat-belt-buckle-centre-screw/documents"}}