{"id":"F2006L00428","name":"AD/DO 328/48 - Rudder Spring Tab","slug":"ad-do-328-48-rudder-spring-tab","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":117101,"registerId":"commonwealth-F2006L00428-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 328/48 | Rudder Spring Tab | 3/2006 |\n| ------------ | ----------------- | ------ |\n\n| Applicability: | Model 328-100 aircraft, serial numbers 3005 through 3119, equipped with a rudder spring tab with serial numbers up to and including 1145; and spare part spring tabs with serial numbers up to and including 9060.Note: Spring tabs with serial number 1146 and subsequent, and spare part spring tabs with serial 9061 and subsequent, are not affected. |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with LBA AD 2000-002/2.Note 1: Dornier 328 Alert Service Bulletin No. ASB-328-55-028 Revision 3, or later LBA approved revision, refers.Note 2: Compliance with Dornier 328 Service Bulletin No. SB-328-55-307Revision 1 terminates the requirements of this Directive.                                                              |\n| Compliance:    | Before 31 March 2006, unless already accomplished.                                                                                                                                                                                                                                                                                                        |\n|                | This Airworthiness Directive becomes effective on 16 March 2006.                                                                                                                                                                                                                                                                                          |\n| Background:    | Reports were received of cracks on the trailing edge of rudder spring tabs. This condition can reduce the flutter margin for the rudder spring tab, rudder, and the aircraft.                                                                                                                                                                             |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n30 January 2006","sortOrder":0},{"sectionNumber":"AD/DO 328/48","sectionType":"part","heading":"AD/DO 328/48","content":"## AD/DO 328/48","sortOrder":1},{"sectionNumber":"Rudder Spring Tab","sectionType":"part","heading":"Rudder Spring Tab","content":"## Rudder Spring Tab","sortOrder":2},{"sectionNumber":"3/2006","sectionType":"part","heading":"3/2006","content":"## 3/2006","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow Airworthiness Directive targeting a specific mechanical defect in specific aircraft. It has not expanded beyond its original safety purpose."},"complexity_factors":["Very short document (approximately 200 words)","Only 4 defined applicability criteria (aircraft model, serial range, part type, part serial range)","Single requirement referencing external documents rather than spelling out technical steps","No nested exceptions or conditional logic — just one exemption note for newer serial numbers","Clear compliance date with simple alternative termination condition","No cross-references to other legislation or complex legal machinery"],"plain_english_summary":"This AD mandates inspection or repair of rudder spring tabs on Dornier 328‑100 aircraft (S/N 3005–3119) with affected tab serials (up to 1145; spares up to 9060), using the cited service bulletins. Compliance is required before 31 March 2006 (unless already done). Cracks in the tab trailing edge can reduce flutter margin, risking dangerous vibration, loss of control or structural failure — so affected aircraft must be fixed or grounded."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The AD's scope is limited to specific Dornier 328-100 airframe serials and specific rudder spring tab serial ranges (Applicability) and requires actions per LBA AD 2000-002/2 (Requirement). It does not expand beyond addressing the reported trailing-edge cracks or beyond the listed serial-number ranges; compliance may be terminated by the referenced Dornier service bulletin (Requirement note)."},"complexity_factors":["Narrow applicability by aircraft and part serial numbers (Applicability) requires operators to check both installed parts and spare-part inventories.","The AD does not set out inspection or repair steps itself but mandates compliance with LBA AD 2000-002/2 (Requirement), creating a dependency on an external authority document.","References to Dornier service documents — ASB-328-55-028 Revision 3 (informative) and SB-328-55-307 Revision 1 as terminating action (Requirement notes) — require operators to reconcile multiple documents to determine terminating vs interim actions.","A firm compliance deadline (Compliance: before 31 March 2006; effective 16 March 2006) imposes scheduling pressure on operators and maintenance organisations.","The background safety risk (Background) — reduced flutter margin caused by trailing-edge cracks — is technical and may require specialist inspection techniques and engineering judgement.","The text distinguishes affected from unaffected serial ranges for both installed and spare tabs, increasing record‑keeping and traceability obligations.","Lack of technical detail in the AD text shifts responsibility and cost to operators to obtain the referenced LBA/Dornier materials and perform mandated work."],"plain_english_summary":"**This Airworthiness Directive requires operators of Dornier 328‑100 aircraft (serial numbers 3005–3119) fitted with rudder spring tabs up to serial 1145 (and spare tabs up to 9060) to carry out the actions specified in LBA AD 2000‑002/2 by 31 March 2006.** It responds to reports of cracks on the trailing edge of rudder spring tabs that can reduce the flutter margin for the spring tab, rudder and aircraft, so operators must inspect/repair affected parts per the referenced documents."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-do-328-48-rudder-spring-tab","history":"/api/acts/ad-do-328-48-rudder-spring-tab/history","analysis":"/api/acts/ad-do-328-48-rudder-spring-tab/analysis","conflicts":"/api/acts/ad-do-328-48-rudder-spring-tab/conflicts","importantCases":"/api/acts/ad-do-328-48-rudder-spring-tab/important-cases","documents":"/api/acts/ad-do-328-48-rudder-spring-tab/documents"}}