{"id":"F2007L02565","name":"AD/SD3-60/68 Amdt 2 - Elevator Trim Tab Balance Weight Brackets","slug":"ad-sd3-60-68-amdt-2-elevator-trim-tab-balance-weight-brackets","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":68254,"registerId":"commonwealth-F2007L02565-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Short SD3-60 Series Aeroplanes","sectionType":"division","heading":"Short SD3-60 Series Aeroplanes","content":"### Short SD3-60 Series Aeroplanes\n\n| AD/SD3-60/68 Amdt 2 | Elevator Trim Tab Balance Weight Brackets | 9/2007 |\n| ------------------- | ----------------------------------------- | ------ |\n\n| Applicability: | Model SD3-60 aircraft, all serial numbers.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |\n| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the requirements of EASA Emergency AD 2007-0107-E.Note: Shorts Service Bulletins SD360-55-20 Revision 2 and SD360-55-A21Revision 1, or later EASA approved revisions, refer.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |\n| Compliance:    | As specified in the Requirement document, with a revised effective date of30 August 2007.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |\n|                | This Amendment becomes effective on 30 August 2007.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |\n| Background:    | During a routine structural inspection, an operator found that the elevator tab balance weight brackets on both trim tabs were cracked. Examination of the cracked brackets by the aircraft manufacturer determined that they were not manufactured in conformity to the approved design standard. The non-conformity has the potential to greatly reduce the fatigue life of the brackets, causing premature crack initiation and failure.Amendment 1 was prompted by a new UK CAA AD, which cancelled previously issued ADs 009-06-2003 (AD/SD3-60/66) and G-2004-0032. This action was in response to an investigation by the Type Certificate Holder which revealed the new brackets were not manufactured in conformity with the applicable design data.Amendment 2 is issued in response to a new EASA AD, which addresses the issue of ‘reworked’ brackets. It also combines the necessary corrective actions into a single AD that assures the correct standard of elevator trim tab mass balance weight brackets are installed. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n20 July 2007","sortOrder":0},{"sectionNumber":"AD/SD3-60/68 Amdt 2","sectionType":"part","heading":"AD/SD3-60/68 Amdt 2","content":"## AD/SD3-60/68 Amdt 2","sortOrder":1},{"sectionNumber":"Elevator Trim Tab Balance Weight Bracket","sectionType":"part","heading":"Elevator Trim Tab Balance Weight Brackets","content":"## Elevator Trim Tab Balance Weight Brackets","sortOrder":2},{"sectionNumber":"9/2007","sectionType":"part","heading":"9/2007","content":"## 9/2007","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"},"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":true,"description":"Amendment 2 broadened and consolidated the AD: it adds the issue of ‘reworked’ brackets and combines earlier corrective actions into a single AD to ensure brackets conform to design standard. It also set a revised effective date of 30 August 2007 (Background; Compliance)."},"complexity_factors":["Cross‑jurisdictional references: mandatory action is prescribed by an EASA Emergency AD while domesticated by CASA (Requirement; Background).","External document dependency: compliance requires following EASA AD 2007‑0107‑E and specific Shorts Service Bulletins (Requirement).","Applicability breadth: applies to all serial numbers of SD3‑60 aircraft, increasing population affected (Applicability).","Technical cause and remedy: manufacturing non‑conformity and ‘reworked’ brackets change inspection/replacement scope and require technical judgement for corrective action (Background).","Combined corrective actions: Amendment consolidates prior ADs and corrective steps into one instrument, altering procedural complexity for operators and maintainers (Background).","Timing constraint: revised effective date (30 August 2007) establishes a fixed compliance milestone operators must meet (Compliance).","Operational burden: inspections and possible part replacement impose direct costs, maintenance downtime and supply/parts coordination on operators (Requirement; Compliance).","Document control risk: requirement to use specific revisions or later EASA‑approved revisions creates administrative tracking and approval needs (Requirement)."],"plain_english_summary":"Requires operators of Short SD3-60 aircraft (all serial numbers) to carry out the actions in EASA Emergency AD 2007‑0107‑E and associated Shorts Service Bulletins to inspect and, where necessary, repair or replace elevator trim‑tab mass balance weight brackets. The AD was issued after discovery that some brackets were manufactured or reworked out of conformity and can crack, shortening fatigue life (Requirement; Background). Compliance must follow the Requirement document by the revised effective date 30 August 2007 (Compliance). Operators pay for inspection and rectification."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":true,"description":"The original directive (implied by references to Amendment 1) addressed newly manufactured non-conforming brackets. Amendment 2 expands scope to include 'reworked' brackets — previously repaired or modified components that were not originally covered. It also consolidates multiple prior directives (AD/SD3-60/66 and G-2004-0032) into a single instrument, effectively broadening from a narrow manufacturing defect fix to a comprehensive bracket integrity program."},"complexity_factors":["Very short document (approximately 250 words of substantive content)","Only 1 defined applicability criterion (model SD3-60, all serial numbers)","Single requirement referencing external documents (EASA AD and manufacturer service bulletins) rather than spelling out technical steps","No nested conditional logic or exceptions within the text itself","Background narrative is descriptive rather than creating legal conditions","Heavy reliance on incorporated external standards (EASA AD 2007-0107-E, Shorts Service Bulletins SD360-55-20 Rev 2 and SD360-55-A21 Rev 1) — complexity is offloaded to those documents"],"plain_english_summary":"This AD mandates inspection and corrective action on the elevator trim-tab balance-weight brackets of all Short SD3-60 aircraft after discovery of manufacturing defects that cause cracking and fatigue. It affects every owner, operator, and maintainer of these aircraft, enforces compliance with the corresponding EASA emergency AD and service bulletins, and (Amendment 2) clarifies reworked brackets with a compliance deadline of 30 August 2007."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sd3-60-68-amdt-2-elevator-trim-tab-balance-weight-brackets","history":"/api/acts/ad-sd3-60-68-amdt-2-elevator-trim-tab-balance-weight-brackets/history","analysis":"/api/acts/ad-sd3-60-68-amdt-2-elevator-trim-tab-balance-weight-brackets/analysis","conflicts":"/api/acts/ad-sd3-60-68-amdt-2-elevator-trim-tab-balance-weight-brackets/conflicts","importantCases":"/api/acts/ad-sd3-60-68-amdt-2-elevator-trim-tab-balance-weight-brackets/important-cases","documents":"/api/acts/ad-sd3-60-68-amdt-2-elevator-trim-tab-balance-weight-brackets/documents"}}