{"id":"F2006B06842","name":"AD/SD3-30/41 - Flight Control Trim Chain Connecting Link","slug":"ad-sd3-30-41-flight-control-trim-chain-connecting-link","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114707,"registerId":"commonwealth-F2006B06842-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.002.png)\n\n![](image.002.png)  \nFor the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.","sortOrder":0},{"sectionNumber":"AD/SD3-30/41 Flight Control Trim Chain C","sectionType":"part","heading":"AD/SD3-30/41 Flight Control Trim Chain Connecting Link 8/2000","content":"# AD/SD3-30/41 Flight Control Trim Chain Connecting Link 8/2000\n\nApplicability: All SD3-30 aircraft.\n\nRequirement: Inspect in accordance with Shorts Mandatory Service Bulletin SD330-27-38. Compliance: As specified in the Requirement document.\n\nThis Airworthiness Directive becomes effective on 10 August 2000.\n\nBackground: The manufacturer received a report indicating that a trim cable / chain assembly had been incorrectly manufactured using ‘spring clip’ connecting link. This means of connection does not meet the requirements for Class 1 locking.\n\n![Signature of Bernard Malcolm Hole Delegate of the Civil Aviation Safety Authority](image.003.png)  \n\nBernard Malcolm Hole\n\nDelegate of the Civil Aviation Safety Authority 21 June 2000\n\n![](image.002.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 12 July 2000.","sortOrder":1}],"analysis":{"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"},"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 term implicitly referenced (Class 1 locking — industry standard not defined in text)","Single applicability criterion (all SD3-30 aircraft)","Single requirement referencing external document (Shorts Mandatory Service Bulletin)","No nested conditions, exceptions, or cross-references to other legislation","Linear structure: Applicability → Requirement → Compliance → Background"],"plain_english_summary":"This Airworthiness Directive from CASA (effective 10 August 2000) legally requires owners/operators of all Short SD3-30 aircraft to inspect trim cable/chain connecting links per Shorts Mandatory Service Bulletin SD330-27-38.  \n\nIt addresses assemblies built with a non‑conforming 'spring clip' that lack Class 1 locking and could disengage, risking loss of trim control and aircraft safety."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":true,"description":"The AD applies to the entire SD3‑30 fleet even though the reported defect arose from a single trim cable/chain assembly (Background; Applicability). That broad application extends inspection obligations beyond only aircraft known to have the suspect linking method. CASA prescribes the inspection per Shorts Mandatory Service Bulletin SD330‑27‑38 and sets compliance timing via that document, so owners/operators bear inspection and rectification costs while the delegate decides the corrective measure (Requirement; Compliance; opening paragraph)."},"complexity_factors":["Fleet‑wide applicability to all SD3‑30 aircraft increases administrative scope (Applicability).","Mandatory action references an external technical document (Shorts Mandatory Service Bulletin SD330‑27‑38) rather than giving full procedural detail in the AD (Requirement).","Compliance timing delegated to the service bulletin creates operational dependence on that document for deadlines (Compliance: 'As specified in the Requirement document').","Technical nature of the inspection and any repair requires qualified maintenance personnel and likely shop/parts resources (Background: trim cable/chain and Class 1 locking requirement).","Regulatory basis is a delegated CASA decision under subregulation 39.1(1) of CAR 1998, which concentrates decision authority in the delegate (opening paragraph).","Effective date and Gazette notification impose an enforceable start date (Effective date: 10 August 2000; Gazette 12 July 2000)."],"plain_english_summary":"This Airworthiness Directive requires operators of all SD3-30 aircraft to inspect the flight‑control trim chain connecting link in line with Shorts Mandatory Service Bulletin SD330‑27‑38 after a trim cable/chain was reported fitted with a non‑Class 1 ‘spring clip’ link that fails locking requirements. CASA sets the compliance standard and effective date; aircraft owners/operators and maintenance organisations must carry out and pay for the inspections and any corrective work because the connection is safety‑critical and could affect trim integrity."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sd3-30-41-flight-control-trim-chain-connecting-link","history":"/api/acts/ad-sd3-30-41-flight-control-trim-chain-connecting-link/history","analysis":"/api/acts/ad-sd3-30-41-flight-control-trim-chain-connecting-link/analysis","conflicts":"/api/acts/ad-sd3-30-41-flight-control-trim-chain-connecting-link/conflicts","importantCases":"/api/acts/ad-sd3-30-41-flight-control-trim-chain-connecting-link/important-cases","documents":"/api/acts/ad-sd3-30-41-flight-control-trim-chain-connecting-link/documents"}}