{"id":"F2006B06816","name":"AD/SD3-30/15 - Toilet Waste Bin Flap - Improve Fire Resistance","slug":"ad-sd3-30-15-toilet-waste-bin-flap-improve-fire-resistance","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114680,"registerId":"commonwealth-F2006B06816-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SD3-30/15 - Toilet Waste Bin Flap - Improve Fire Resistance","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/SD3-30/15 Toilet Waste Bin Flap - Improve Fire Resistance 3/84\n\nApplicability: Model SD3-30 with S/Nos SH 3002 to SH 3095. Document:  Shorts SB No. SD3-25-34.\n\nCompliance: Before 1 September 1984.\n\n \n\nBackground: Manufacturer's modifications to meet C.A.A requirements.\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\n \n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive formalises and mandates the manufacturer's modification for a defined set of aircraft to meet C.A.A. requirements. The text confines the action to the same model and serial-number range and requires conformity with the manufacturer's Service Bulletin. There is no indication in the instrument that the scope (types of aircraft affected or nature of the modification) departs from the manufacturer's stated modification; therefore scope has not changed from the manufacturer's described intent. (Applicability; Document; Background)"},"complexity_factors":["Narrow applicability limited to one model and a short serial-number range (SD3-30, S/Nos SH3002–SH3095) (Applicability)","Single, specific technical action referenced by a single Service Bulletin rather than multiple options (Document)","Fixed compliance deadline with no alternatives or exemptions stated (Compliance)","Regulatory authority and enforcement implied by Civil Aviation Regulations header but procedural detail not included (COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY)","Limited background information provided; relies on manufacturer material for technical content (Background; Document)"],"plain_english_summary":"### What this instrument requires\n\n- The directive requires a specific modification to the toilet waste-bin flap to improve its resistance to fire. The required work is described in \"Shorts SB No. SD3-25-34.\" (Document)\n- It applies only to Short SD3-30 aeroplanes with serial numbers SH3002 to SH3095. (Applicability)\n- The modification must be completed before 1 September 1984. (Compliance)\n\n### Who it affects and who decides\n\n- Owners and operators of the listed SD3-30 aircraft must carry out the modification. (Applicability; Compliance)\n- The Civil Aviation Safety Authority is the issuing authority under the Civil Aviation Regulations framework referenced in the header. The directive sets a mandatory deadline. (COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY)\n\n### Why the change is required (official rationale) and how that matters mechanically\n\n- The background given by the directive states that the manufacturer issued modifications to meet Civil Aviation Authority requirements. (Background)\n- Mechanically, compliance is achieved by following the steps and parts specified in the manufacturer's Service Bulletin (Shorts SB No. SD3-25-34). The directive makes that service action mandatory for the identified fleet and fixes a compliance date. (Document; Applicability; Compliance)\n\n### Who pays, the costs and incentives\n\n- Direct costs fall on the aircraft owners/operators: parts, labour, and any aircraft downtime to perform the modification. (Applicability; Compliance)\n- The manufacturer (or its suppliers) may obtain business from supplying parts or carrying out the modification because the directive requires work described in the manufacturer's service bulletin. The directive does not specify procurement or pricing terms. (Document)\n- Operators gain compliance with the regulator’s requirement; the regulator achieves a uniform standard across the specified serial-numbered fleet. (Background; Compliance)\n\n### Compliance burden, discretion and implementation risks\n\n- Burden: a one-off mandated modification for a tightly defined set of serial numbers, with a fixed compliance deadline. This creates scheduling and resource burdens (parts, skilled labour, aircraft out-of-service time) for affected operators. (Applicability; Compliance)\n- Discretion: the directive refers operators to the manufacturer's Service Bulletin for the method; the text does not set out alternative compliance routes or exemptions. That narrows operational discretion to the content of the Service Bulletin unless the regulator provides an alternative. (Document)\n- Implementation risks: if parts or qualified labour are limited, operators may experience delays or additional costs. If operators do not comply by the deadline, enforcement action under the Civil Aviation Regulations is the implied regulatory mechanism. (Compliance; COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY)\n\n### Trade-offs and effects on private choice and business\n\n- The measure imposes a compulsory technical change on a defined, small group of aircraft. That concentrates costs on those owners/operators while aiming to deliver a safety-related improvement for those aircraft. (Applicability; Background)\n- The Service Bulletin route centralises the technical specification with the manufacturer, which reduces the need for regulators to specify technical detail but channels commercial work to parties that can supply or carry out the SB-specified modification. (Document)\n\n(References: Applicability; Document; Compliance; Background; header referring to Civil Aviation Regulations.)"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive focused specifically on toilet waste bin fire resistance modifications. It has not expanded beyond its original technical safety purpose. The scope remains tightly constrained to the specific aircraft serial numbers and the specific safety modification described."},"complexity_factors":["Very short document (approximately 150 words)","Only 4 defined elements: applicability (specific serial numbers), document reference, compliance date, and brief background","No cross-references to other legislation or regulations beyond the enabling Civil Aviation Regulations 1998","Single, unambiguous requirement with no exceptions or conditional logic","Straightforward command structure: do X by Y date using Z document"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** issued by Australia's Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations 1998. It mandates a safety modification for specific Short SD3-30 aircraft.\n\n**What it does:**\n- Requires owners/operators of certain Short SD3-30 aeroplanes (serial numbers SH 3002 to SH 3095) to improve the fire resistance of the toilet waste bin flap\n- The modification must follow the manufacturer's Service Bulletin (Shorts SB No. SD3-25-34)\n\n**Who it affects:**\n- Operators of Short SD3-30 aircraft with serial numbers between SH 3002 and SH 3095\n- Maintenance organisations servicing these aircraft\n\n**Why it matters:**\n- Fire safety in aircraft toilets is critical — waste bins can contain flammable materials (paper, chemicals) that could ignite\n- This directive ensures these specific aircraft meet enhanced fire safety standards set by the UK Civil Aviation Authority (C.A.A.)\n- Non-compliance by the deadline (1 September 1984) would make the aircraft unairworthy — meaning they cannot legally fly\n\n**Key deadline:** The modification had to be completed before 1 September 1984."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sd3-30-15-toilet-waste-bin-flap-improve-fire-resistance","history":"/api/acts/ad-sd3-30-15-toilet-waste-bin-flap-improve-fire-resistance/history","analysis":"/api/acts/ad-sd3-30-15-toilet-waste-bin-flap-improve-fire-resistance/analysis","conflicts":"/api/acts/ad-sd3-30-15-toilet-waste-bin-flap-improve-fire-resistance/conflicts","importantCases":"/api/acts/ad-sd3-30-15-toilet-waste-bin-flap-improve-fire-resistance/important-cases","documents":"/api/acts/ad-sd3-30-15-toilet-waste-bin-flap-improve-fire-resistance/documents"}}