{"id":"F2006B06834","name":"AD/SD3-30/32 - Inner Flap Sub-Assembly Lever Bracket","slug":"ad-sd3-30-32-inner-flap-sub-assembly-lever-bracket","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114698,"registerId":"commonwealth-F2006B06834-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SD3-30/32 - Inner Flap Sub-Assembly Lever Bracket","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Short SD3-30 Series Aeroplanes\n\n \n\nAD/SD3-30/32 Inner Flap Sub-Assembly Lever Bracket 5/97\n\nApplicability: All SD3-30 aircraft.\n\n \n\nRequirement: Inspect in accordance with Shorts Mandatory Service Bulletin SD3-27-36.\n\n \n\nCompliance: Before 27 July 1997 for the initial inspection; thereafter as specified in the Requirement Document for the repeat inspection periods.\n\n \n\nThis Airworthiness Directive becomes effective on 24 April 1997.\n\n \n\nBackground: The manufacturer received reports of corrosion and cracking on inner flap sub- assembly lever brackets.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive implements an inspection requirement addressing reported corrosion and cracking on the inner flap sub-assembly lever bracket for all SD3-30 aircraft. The text confines action to inspection per the manufacturer’s Mandatory Service Bulletin and sets an initial compliance date; it does not expand or narrow the population covered or alter the nature of the remedy beyond requiring inspections. There is no indication in the instrument text that the scope has been broadened or narrowed from its stated purpose (Applicability; Requirement; Background; Compliance)."},"complexity_factors":["Narrow technical scope limited to a single component on a single aircraft type (Applicability).","Mandatory action is a single type of intervention (inspection) rather than a set of corrective prescriptions (Requirement).","Binding initial compliance date with repeat intervals deferred to an external document (Compliance; Requirement), requiring operators to obtain and follow a separate service bulletin.","Operational scheduling and potential follow-on maintenance if defects are found (Background; Requirement) add practical complexity for operators.","Regulatory linkage: the AD is issued under the Civil Aviation Regulations framework and becomes effective on a specified date (header; effective date), creating a hard start date for compliance."],"plain_english_summary":"What this instrument changes, mechanically:\n\n- It requires every operator/owner of an SD3-30 aeroplane to carry out an inspection of the inner flap sub-assembly lever bracket in line with the manufacturer's Mandatory Service Bulletin SD3-27-36 (Requirement). The first inspection must be completed before 27 July 1997; repeat inspection intervals are those given in the Requirement Document (Compliance). This Airworthiness Directive is issued under the Civil Aviation Regulations 1998 and became effective on 24 April 1997 (header; This Airworthiness Directive becomes effective... 24 April 1997).\n\nStated reason and official rationale:\n\n- The directive is issued because the manufacturer reported occurrences of corrosion and cracking on the inner flap sub-assembly lever brackets (Background). The AD’s stated purpose is to ensure those brackets are inspected to detect such corrosion or cracking.\n\nWho must act, who decides, and what changes in behaviour:\n\n- Who must act: owners/operators of all SD3-30 aircraft (Applicability). They are required to arrange and complete the inspections prescribed by the manufacturer’s Mandatory Service Bulletin SD3-27-36 (Requirement).\n- Who decides timing/details: the AD fixes the initial compliance deadline (before 27 July 1997) and makes repeat intervals as specified in the referenced Requirement Document (Compliance). The detailed inspection procedures and any further instructions are set out in the manufacturer’s Mandatory Service Bulletin SD3-27-36 (Requirement).\n- Behavioural change: affected operators must incorporate the inspection into their maintenance programme and follow the procedures and repeat intervals in the service bulletin.\n\nPractical implications, costs, incentives and trade-offs (source-grounded):\n\n- Compliance burden and likely payers: the AD creates an obligation on the electorate of persons responsible for SD3-30 aircraft to obtain the Mandatory Service Bulletin and perform the inspections (Applicability; Requirement). That obligation implies those operators will bear the direct costs of arranging inspections and any consequent maintenance or parts replacement if defects are found (Requirement; Compliance). The AD text itself does not allocate funding or reimburse costs.\n\n- Reliance on an external document: the AD delegates procedural detail and repeat inspection timing to the manufacturer’s Mandatory Service Bulletin SD3-27-36 (Requirement; Compliance). Operators therefore must obtain and follow that external document to satisfy the AD.\n\n- Operational effects and implementation risk: the AD sets a firm initial deadline (before 27 July 1997) and makes subsequent intervals dependent on the Requirement Document (Compliance). Meeting inspection deadlines may require scheduling maintenance time; if corrosion or cracking is found (Background), additional work will be needed consistent with the service bulletin. The AD does not itself describe repair actions or parts; those are in the referenced service bulletin (Requirement).\n\n- Market effects on suppliers and maintainers: by mandating inspections to a manufacturer’s bulletin, the AD increases demand for the specific inspection work and any repair services the bulletin prescribes. The AD does not change ownership, certification, or operational rules beyond imposing this inspection requirement (Applicability; Requirement).\n\nTrade-offs and implementation points to watch (source-grounded):\n\n- Concentrated obligation: the directive applies only to SD3-30 aeroplanes, so the compliance burden falls on a defined group of operators (Applicability).\n- Delegation of detail: because the AD refers to the Mandatory Service Bulletin for procedures and repeat intervals, compliance depends on access to and the contents of that bulletin (Requirement; Compliance).\n- The AD specifies an initial compliance date and leaves repeat intervals to the Requirement Document, which concentrates operational discretion about frequency and method in the manufacturer’s guidance rather than in the AD text itself (Compliance).\n\nSections cited: Applicability; Requirement (Shorts Mandatory Service Bulletin SD3-27-36); Compliance (initial date before 27 July 1997; repeat intervals as specified in the Requirement Document); Background (manufacturer reported corrosion and cracking); effective date (24 April 1997)."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow airworthiness directive targeting a specific safety issue on a specific aircraft type. The scope remains tightly focused on the original safety concern (corrosion/cracking of lever brackets) without expansion into broader operational or regulatory matters."},"complexity_factors":["Single, specific mechanical component targeted (inner flap sub-assembly lever bracket)","Only one mandatory action required (inspection per referenced service bulletin)","Simple compliance structure: one initial deadline plus reference to external document for repeat intervals","No defined terms section, no conditional logic, no nested exceptions","Cross-reference limited to one external manufacturer document (Service Bulletin SD3-27-36)","Total length: approximately 150 words of substantive content"],"plain_english_summary":"This is an **Airworthiness Directive** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It requires owners and operators of **Short SD3-30 Series aircraft** (a type of regional turboprop aeroplane) to inspect a specific part called the **\"inner flap sub-assembly lever bracket\"** for corrosion and cracking.\n\n**What you must do:**\n- **Inspect** the lever bracket following the manufacturer's official instructions (Shorts Mandatory Service Bulletin SD3-27-36)\n- **First inspection deadline:** Before 27 July 1997\n- **Repeat inspections:** Follow the schedule in the service bulletin after the initial check\n\n**Why this matters:** The manufacturer discovered that these brackets could develop corrosion and cracks, which could compromise the aircraft's flaps (the moving surfaces on the wings that help control lift during takeoff and landing). If the bracket fails, it could affect the aircraft's ability to fly safely.\n\n**Who this affects:** Anyone who owns, operates, or maintains a Short SD3-30 aircraft in Australia."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sd3-30-32-inner-flap-sub-assembly-lever-bracket","history":"/api/acts/ad-sd3-30-32-inner-flap-sub-assembly-lever-bracket/history","analysis":"/api/acts/ad-sd3-30-32-inner-flap-sub-assembly-lever-bracket/analysis","conflicts":"/api/acts/ad-sd3-30-32-inner-flap-sub-assembly-lever-bracket/conflicts","importantCases":"/api/acts/ad-sd3-30-32-inner-flap-sub-assembly-lever-bracket/important-cases","documents":"/api/acts/ad-sd3-30-32-inner-flap-sub-assembly-lever-bracket/documents"}}