{"id":"F2006B06851","name":"AD/SD3-30/7 - Aft Baggage Compartment - Modification","slug":"ad-sd3-30-7-aft-baggage-compartment-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114723,"registerId":"commonwealth-F2006B06851-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SD3-30/7 - Aft Baggage Compartment - Modification","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/SD3-30/7 Aft Baggage Compartment - Modification 3/82\n\nApplicability: All model SD3-30 with S/Nos. SH-3002 to SH-3071, SH-3073, SH-3075, SH-3077 and SH-3078.\n\n \n\nRequirement: Shorts SB SD3-25-30.\n\n \n\nCompliance: Unless already accomplished, modify prior to 30 June 1982.\n\n \n\nBackground: An opening in the furnishings of the aft baggage compartment can result in an inadequate concentration of the fire extinguishant.\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\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive from 1982 addressing a specific fire safety defect in a specific aircraft type. It has not expanded beyond its original narrow technical purpose."},"complexity_factors":["Extremely short document (approximately 150 words)","Only 4 substantive paragraphs (Applicability, Requirement, Compliance, Background)","Zero defined terms requiring interpretation","No cross-references to other legislation or regulations beyond the enabling Civil Aviation Regulations 1988","Single, unambiguous compliance deadline with one simple exception ('unless already accomplished')","No conditional logic, nested exceptions, or alternative compliance pathways","Technical content refers to external manufacturer bulletin (SB SD3-25-30) rather than embedding complex technical specifications"],"plain_english_summary":"This is an **Airworthiness Directive** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations 1988.\n\n**What it does:**\nIt requires owners and operators of specific **Short SD3-30 series aircraft** to carry out a modification to the aft (rear) baggage compartment.\n\n**Who it affects:**\n- Owners and operators of Short SD3-30 aeroplanes with specific serial numbers: SH-3002 through SH-3071, plus SH-3073, SH-3075, SH-3077, and SH-3078.\n\n**What must be done:**\n- Follow the instructions in **Shorts Service Bulletin SD3-25-30** (a technical notice from the aircraft manufacturer detailing the required fix).\n- Complete the modification **before 30 June 1982** unless it has already been done.\n\n**Why it matters:**\nThere was a safety risk where an opening in the baggage compartment's interior fittings could allow fire extinguishing agent to escape or disperse improperly. If a fire broke out, the extinguishant might not reach effective concentration levels, potentially allowing a fire to spread unchecked.\n\nThis directive ensures the fire suppression system works as designed by sealing or modifying the compartment appropriately."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive’s scope, as expressed in the text, is consistent with its stated intent: it applies to a defined set of SD3-30 serial numbers and mandates a modification (via Shorts SB SD3-25-30) to mitigate an identified risk that openings in aft-baggage furnishings can reduce fire extinguishant concentration (Applicability; Requirement; Background). The AD does not indicate any expansion or narrowing beyond that stated purpose."},"complexity_factors":["Narrow and specific applicability: single aircraft model with an enumerated set of serial numbers (Applicability).","Single, clearly stated required action that references one external technical document (Shorts SB SD3-25-30) rather than providing in-text technical detail (Requirement).","Single fixed compliance deadline rather than staged or conditional timing (Compliance).","Limited scope and brief rationale: safety concern is narrowly described (Background).","Lack of detail in the AD about cost allocation, alternative compliance methods, or administrative procedures increases the need to consult the referenced service bulletin for implementation specifics (Requirement; Compliance)."],"plain_english_summary":"This directive requires a physical modification to the aft baggage compartment of specified Short SD3‑30 aircraft (listed serial numbers) to close an opening that can reduce fire‑extinguishant concentration. The work must be performed per Shorts Service Bulletin SD3‑25‑30.\n\nIssued under the Commonwealth/Civil Aviation Safety Authority framework, compliance is mandatory by 30 June 1982."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sd3-30-7-aft-baggage-compartment-modification","history":"/api/acts/ad-sd3-30-7-aft-baggage-compartment-modification/history","analysis":"/api/acts/ad-sd3-30-7-aft-baggage-compartment-modification/analysis","conflicts":"/api/acts/ad-sd3-30-7-aft-baggage-compartment-modification/conflicts","importantCases":"/api/acts/ad-sd3-30-7-aft-baggage-compartment-modification/important-cases","documents":"/api/acts/ad-sd3-30-7-aft-baggage-compartment-modification/documents"}}