{"id":"F2006B08797","name":"AD/DC3/2 - Rudder Hinge Bracket Rivet - Replacement","slug":"ad-dc3-2-rudder-hinge-bracket-rivet-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52153,"registerId":"commonwealth-F2006B08797-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DC3/2 - Rudder Hinge Bracket Rivet - Replacement","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)  Douglas DC3 Series Aeroplanes\n\n \n\nAD/DC3/2 Rudder Hinge Bracket Rivet - Replacement NK\n\nDocument: 1. Douglas SB (DC3) No. 218 Section 1; or\n\n \n\n2. FAA AD 44-7-1; or 3. ANO 105.1.16.1.5.2.\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\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The supplied AD text sets a single, specific obligation — replacement of the rudder hinge bracket rivet — and points to external documents for technical method. There is no indication in the provided text that the scope has been expanded or narrowed relative to its apparent original intent; the directive remains a targeted maintenance requirement referencing established technical documents (AD/DC3/2 and the three referenced sources)."},"complexity_factors":["Short regulatory text that delegates technical detail to external documents (Douglas SB No. 218 Section 1; FAA AD 44‑7‑1; ANO 105.1.16.1.5.2.)","Need for operators to obtain and interpret one of multiple referenced technical sources to determine exact procedure","Technical execution requires qualified maintenance personnel and possible specialised parts/tools","Absence in the supplied text of timing, permissible alternatives, or enforcement detail increases operational ambiguity"],"plain_english_summary":"### What this instrument does\n\n- The airworthiness directive labelled AD/DC3/2 requires the replacement of a rudder hinge bracket rivet on Douglas DC‑3 series aeroplanes. (See: \"AD/DC3/2 Rudder Hinge Bracket Rivet - Replacement\")\n- The directive does not itself set out the replacement procedure in the text supplied. Instead it directs operators to carry out the work in accordance with one of three external documents: 1) Douglas Service Bulletin (DC3) No. 218 Section 1; or 2) FAA AD 44‑7‑1; or 3) ANO 105.1.16.1.5.2. (See: \"Document: 1. Douglas SB (DC3) No. 218 Section 1; or 2. FAA AD 44-7-1; or 3. ANO 105.1.16.1.5.2.\")\n\n### Who this affects\n\n- Owners and operators of Douglas DC‑3 series aeroplanes to which this AD applies.\n- Licensed maintenance organisations and engineers who perform structural repair or replacement work on those aircraft.\n- The Civil Aviation Safety Authority (CASA) or other enforcing authority, insofar as they monitor and enforce compliance with airworthiness directives.\n\n### How it works, mechanically\n\n- The AD imposes an obligation on the operator to replace the specified rivet by following the instructions in one of the three referenced documents. The AD itself is a short prescriptive instrument that delegates technical detail to those external documents (Douglas SB, FAA AD or the ANO provision cited).\n- Because the AD points to multiple documents, an operator can comply by following any one of those referenced sources, as specified in the AD text.\n\n### Who pays, who decides, and what changes\n\n- Who pays: the aircraft owner/operator bears direct costs for parts, labour, inspection, and any aircraft downtime required to complete the replacement. (Cost responsibility follows from the AD placing the maintenance obligation on the operator.)\n- Who decides: the regulator issues and enforces the AD (AD/DC3/2). The technical content and methods are decided in the referenced documents (Douglas SB No. 218 Section 1; FAA AD 44‑7‑1; or ANO 105.1.16.1.5.2).\n- Behavioural change required: operators must plan for, schedule and perform the rivet replacement in accordance with one of the referenced documents, and record compliance as required by applicable maintenance and continuing airworthiness rules.\n\n### Implementation, compliance burden and trade‑offs\n\n- Compliance burden: operators must obtain the referenced document they choose to follow, secure the correct replacement parts and qualified maintenance personnel, and allocate aircraft downtime to carry out the work. The AD text itself does not specify timing, parts, or step‑by‑step procedures; those details are in the external documents cited.\n- Trade‑offs and opportunity cost: time and money spent on the replacement cannot be used for other maintenance or operational activities during aircraft downtime. Operators may face scheduling and cost trade‑offs when deciding when to perform the work.\n- Bureaucratic discretion and enforcement: the AD is the regulatory instrument requiring the action; the technical method is in the referenced documents. Enforcement discretion (inspection, acceptance of alternative methods) is not described in the supplied text.\n\n### Incentives, risks and substitution effects\n\n- Incentives: operators are financially incentivised to complete the work to remain compliant and airworthy. The AD gives operators a choice among three documents for technical guidance, which may affect the exact method or parts used.\n- Implementation risk: technical risk arises from carrying out structural work (requires qualified maintenance). The AD text supplied does not include a compliance schedule or acceptability criteria for alternative methods, so ambiguity about timing or permissible deviations could create operational risk unless clarified by the operator's authorised maintenance organisation or by the referenced documents.\n\n### What the source states about purpose, and what can be tested against costs\n\n- The supplied AD text does not state an explicit purpose or safety rationale in itself; it simply mandates replacement per the listed documents (see AD/DC3/2 and the three referenced documents). Any stated purpose or justification would appear in the external documents (Douglas SB No. 218 Section 1; FAA AD 44‑7‑1; ANO 105.1.16.1.5.2).\n- Given the AD’s mechanics, the costs fall to the operator (parts, labour, downtime). The principal trade‑off for operators is allocating resources to comply versus other uses of maintenance funds and aircraft availability. The AD’s reliance on external technical documents concentrates technical detail outside the notice, which reduces repetition in the AD but increases the need for operators to obtain and follow those documents.\n\n(References: AD/DC3/2; Document: 1. Douglas SB (DC3) No. 218 Section 1; 2. FAA AD 44‑7‑1; 3. ANO 105.1.16.1.5.2.)"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a narrow, targeted maintenance directive focused on a specific mechanical component of a specific vintage aircraft. It has not expanded beyond its original purpose of ensuring rudder hinge bracket integrity on DC-3 aircraft."},"complexity_factors":["Extremely short document (approximately 150 words of substantive content)","Only 3 defined compliance pathways (the three technical documents listed)","Single mechanical issue addressed (rudder hinge bracket rivets)","No nested exceptions, conditional logic, or cross-references to other legislation beyond the three listed technical standards","Applies to one specific aircraft type only (Douglas DC-3 series)","No interpretation section or defined terms"],"plain_english_summary":"This is a **Civil Aviation Safety Authority (CASA) Airworthiness Directive** that applies to **Douglas DC-3 series aircraft**.\n\n**What it does:**\nThis directive orders the **replacement of rivets on the rudder hinge bracket** — a critical structural component that connects the aircraft's rudder (the movable part on the tail that steers the plane left and right) to the fuselage.\n\n**Why it matters:**\nRivets on the rudder hinge bracket can wear out, corrode, or fail over time. If these rivets fail in flight, the pilot could lose control of the rudder, potentially causing loss of directional control and a serious accident. This directive ensures operators inspect and replace these rivets before they become dangerous.\n\n**Who it affects:**\n- Owners and operators of Douglas DC-3 aircraft (a vintage twin-engine propeller aircraft, famous from the 1930s-40s)\n- Maintenance engineers responsible for keeping these historic aircraft airworthy\n\n**Compliance:**\nOperators must follow one of three approved technical documents to carry out the replacement:\n1. Douglas Service Bulletin (DC3) No. 218 Section 1 — the manufacturer's official repair instructions\n2. FAA AD 44-7-1 — the equivalent American safety directive\n3. ANO 105.1.16.1.5.2 — an Australian National Order (older aviation regulation)\n\n**In short:** If you fly or maintain a DC-3, you must check and replace the rudder hinge bracket rivets according to these specific technical standards to keep the aircraft safe."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dc3-2-rudder-hinge-bracket-rivet-replacement","history":"/api/acts/ad-dc3-2-rudder-hinge-bracket-rivet-replacement/history","analysis":"/api/acts/ad-dc3-2-rudder-hinge-bracket-rivet-replacement/analysis","conflicts":"/api/acts/ad-dc3-2-rudder-hinge-bracket-rivet-replacement/conflicts","importantCases":"/api/acts/ad-dc3-2-rudder-hinge-bracket-rivet-replacement/important-cases","documents":"/api/acts/ad-dc3-2-rudder-hinge-bracket-rivet-replacement/documents"}}