{"id":"F2006L00434","name":"AD/DO 328/42 - Rudder Spring Tab Bolt","slug":"ad-do-328-42-rudder-spring-tab-bolt","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":117113,"registerId":"commonwealth-F2006L00434-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 328/42 | Rudder Spring Tab Bolt | 3/2006 |\n| ------------ | ---------------------- | ------ |\n\n| Applicability: | Model 328-100 aircraft, serial numbers 3005 through 3119.                                                    |\n| -------------- | ------------------------------------------------------------------------------------------------------------ |\n| Requirement:   | Action in accordance with LBA AD 2001-261.Note: Dornier 328 Service Bulletin No. SB-328-55-351 refers.       |\n| Compliance:    | Before 31 March 2006, unless already accomplished.                                                           |\n|                | This Airworthiness Directive becomes effective on 16 March 2006.                                             |\n| Background:    | This Directive requires replacement of rudder spring tab bolts with improved retention and locking function. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n30 January 2006","sortOrder":0},{"sectionNumber":"AD/DO 328/42","sectionType":"part","heading":"AD/DO 328/42","content":"## AD/DO 328/42","sortOrder":1},{"sectionNumber":"Rudder Spring Tab Bolt","sectionType":"part","heading":"Rudder Spring Tab Bolt","content":"## Rudder Spring Tab Bolt","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 discrete, targeted safety directive addressing a specific mechanical defect. It has not expanded beyond its original purpose of mandating bolt replacement on affected aircraft."},"complexity_factors":["Very short document (under 200 words)","Only one substantive requirement (replace bolts)","Single cross-reference to external technical document (LBA AD 2001-261)","No defined terms section","Simple applicability criteria (specific model and serial number range)","Clear, single deadline for compliance"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order for aircraft. It requires owners and operators of specific Dornier 328-100 aeroplanes (serial numbers 3005 through 3119) to replace the bolts on the rudder spring tab with improved versions that have better retention and locking features.\n\n**Why this matters:** The rudder spring tab is part of what helps control the aircraft's direction. If the bolt fails, the pilot could lose partial or full rudder control — a serious flight safety risk.\n\n**Who must act:** Anyone operating the affected Dornier 328-100 aircraft.\n\n**What they must do:** Follow the German aviation authority's directive (LBA AD 2001-261) and the manufacturer's Service Bulletin (SB-328-55-351) to replace the bolts.\n\n**When:** Before 31 March 2006 (or sooner if already done). The order takes effect on 16 March 2006."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The Directive's scope matches the stated safety objective in the text: it applies only to Dornier 328‑100 aircraft S/N 3005–3119 and mandates bolt replacement per LBA AD 2001‑261; there is no expansion of affected aircraft, tasks, or operational restrictions beyond that requirement (Applicability; Requirement; Background)."},"complexity_factors":["Narrow applicability: specific to Dornier 328‑100 serial numbers 3005–3119 (Applicability)","Single mandated technical action: replacement of rudder spring tab bolts (Background; Requirement)","Cross-reference to foreign AD and manufacturer SB: must follow LBA AD 2001‑261 and SB‑328‑55‑351 (Requirement note)","Fixed and near-term compliance deadline: before 31 March 2006 with effective date 16 March 2006 (Compliance)","Operational burden on operators for parts procurement and maintenance scheduling (Compliance)","Regulatory decision established by CASA delegate — limited administrative discretion in this instrument (Delegate of the Civil Aviation Safety Authority)"],"plain_english_summary":"This Airworthiness Directive requires owners/operators of Dornier 328‑100 aeroplanes, serial numbers 3005–3119, to replace the rudder spring tab bolts with improved retention and locking hardware (Applicability; Requirement; Background). The replacement must be done in accordance with LBA AD 2001‑261 and the referenced Dornier Service Bulletin and completed before 31 March 2006; operators pay for and schedule the work, and the Directive was issued by CASA’s delegate (Requirement note; Compliance; Delegate of the Civil Aviation Safety Authority)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-do-328-42-rudder-spring-tab-bolt","history":"/api/acts/ad-do-328-42-rudder-spring-tab-bolt/history","analysis":"/api/acts/ad-do-328-42-rudder-spring-tab-bolt/analysis","conflicts":"/api/acts/ad-do-328-42-rudder-spring-tab-bolt/conflicts","importantCases":"/api/acts/ad-do-328-42-rudder-spring-tab-bolt/important-cases","documents":"/api/acts/ad-do-328-42-rudder-spring-tab-bolt/documents"}}