{"id":"F2006B02589","name":"AD/B-2/18 - Seat Safety Bracket - Installation","slug":"ad-b-2-18-seat-safety-bracket-installation","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41845,"registerId":"commonwealth-F2006B02589-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B-2/18 - Seat Safety Bracket - Installation","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)  Brantly B-2 Series Helicopters\n\n \n\nAD/B-2/18 Seat Safety Bracket - Installation 9/61\n\nApplicability: Model B-2 prior to S/Nos. 104. Document:  1. Brantly SB No. 13; or\n\n2. FAA AD 61-16-3.\n\n \n\nCompliance: Forthwith.\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 instrument's scope is limited to Brantly Model B-2 helicopters with serial numbers prior to 104 and requires installation of a seat safety bracket following the cited documents. The text supplied contains no indication that the scope has been expanded or narrowed from an earlier intent; it sets a single, immediate mandatory action for the identified aircraft. (Applicability; Document; Compliance)"},"complexity_factors":["Narrow applicability: applies only to Brantly Model B-2 aircraft with serial numbers prior to 104 (Applicability)","Single required action: installation of a specific component (seat safety bracket) rather than multiple measures (title and requirement)","Immediate compliance: 'Forthwith' creates a short timeline and operational scheduling pressure (Compliance)","Reliance on external technical documents: the AD delegates installation detail to Brantly SB No. 13 or FAA AD 61-16-3, requiring users to obtain and follow those documents (Document)","No alternate compliance pathway or staged implementation described in the text (Compliance)"],"plain_english_summary":"What this instrument does (mechanics)\n\n- This airworthiness directive requires that a seat safety bracket be installed on certain Brantly B-2 helicopters. (Applicability; Document; Compliance)\n- It applies to Brantly Model B-2 helicopters with serial numbers prior to 104. (Applicability)\n- The installation must be done following the instructions in either Brantly Service Bulletin No. 13 or FAA Airworthiness Directive 61-16-3. (Document)\n- Compliance is required forthwith — that is, immediately. (Compliance)\n\nWho is affected\n\n- Owners and operators of Brantly B-2 helicopters with serial numbers before 104 must arrange and pay for the installation (Applicability; Compliance).\n- Maintenance organisations and technicians who perform the work will need to follow the specified service bulletin or FAA AD when carrying out the installation (Document).\n\nWhy it matters (claims, trade-offs and practical effects)\n\n- The instrument is framed as a safety requirement to install a seat safety bracket (title and requirement). The directive itself does not set out a narrative explanation of incidents or risk data; it simply mandates installation via the identified technical documents. (Document)\n- Who pays: owners/operators bear the direct cost of parts, labour and aircraft downtime required to install the bracket, because the directive imposes a mandatory modification on the listed aircraft. (Applicability; Compliance)\n- Implementation burden: the AD points to external technical instructions (Brantly SB No. 13 or FAA AD 61-16-3). The work therefore depends on the availability of those documents, availability of parts, and a maintenance provider able to perform the modification to those instructions. The AD itself contains no fitting detail beyond specifying the source documents. (Document)\n- Timing and operational impact: the requirement is immediate (“Forthwith”), which shortens decision and scheduling time for operators and may cause near-term aircraft downtime or rescheduling of flights. (Compliance)\n- Incentives and private choice: affected owners can choose when (immediately, but scheduling within that constraint) and by whom the work is done, provided the installation follows one of the two listed documents. That preserves contractual freedom to use independent maintenance providers, but imposes a mandatory technical standard to be met. (Document; Compliance)\n- Effects on competition and productivity: the directive imposes a compliance cost on each affected helicopter; that cost may be concentrated on a small group of owners (those with Model B-2 prior to S/N 104). If only a few certified providers can source parts or satisfy the specified installation standard, that could raise service costs or create short-term supply bottlenecks. The AD does not itself provide for supply, funding, or approved suppliers. (Applicability; Document)\n- Discretion and administration: the directive is prescriptive and compulsory; it leaves limited administrative discretion to operators beyond selecting which approved document to follow and engaging a provider to perform the work. The Civil Aviation Safety Authority’s discretion is exercised by issuing the AD; the AD does not include an alternate compliance pathway or staged timeline. (Document; Compliance)\n\nCosts, benefits and risks (mechanical, not judgemental)\n\n- Concentrated benefits: occupants of the modified helicopters and the individual owner/operator receive the direct safety-related benefit from the installed bracket. (Title and requirement)\n- Concentrated costs: the same owners/operators face the direct cost of complying (parts, labour, downtime). (Applicability; Compliance)\n- Implementation risks: compliance depends on access to Brantly SB No. 13 or FAA AD 61-16-3 and to suitable maintenance resources; any scarcity of parts or technicians could delay compliance or increase cost. The AD does not address supply, reimbursement, or alternative means of compliance. (Document; Compliance)\n\nKey source citations\n\n- Applicability: “Model B-2 prior to S/Nos. 104.” (Applicability)\n- Installation instructions: “Brantly SB No. 13; or FAA AD 61-16-3.” (Document)\n- Timing: “Compliance: Forthwith.” (Compliance)\n\nOverall practical effect in a single sentence\n\n- Operators of Brantly B-2 helicopters with serial numbers prior to 104 must immediately install a seat safety bracket using the procedures in Brantly SB No. 13 or FAA AD 61-16-3, bearing the costs and arranging the maintenance themselves. (Applicability; Document; Compliance)"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue safety directive. It has not expanded beyond its original purpose of mandating a specific hardware installation for a specific aircraft model."},"complexity_factors":["Extremely short document (under 150 words of substantive content)","Only one substantive requirement (install bracket)","Single applicability criterion (model B-2, serial numbers below 104)","No defined terms section","No cross-references to other legislation beyond two external technical documents","No conditional logic, exceptions, or nested provisions","Simple imperative compliance requirement ('Forthwith')"],"plain_english_summary":"**What this is:** An Airworthiness Directive (AD) — essentially a mandatory safety order — issued by Australia's Civil Aviation Safety Authority (CASA) for a specific type of helicopter.\n\n**What it does:** Requires owners and operators of **Brantly B-2 series helicopters** (specifically those with serial numbers before 104) to install a **seat safety bracket**. This is a physical hardware fix to prevent seat failure during flight.\n\n**Who it affects:** Anyone who owns, operates, or maintains early-model Brantly B-2 helicopters in Australia.\n\n**When to comply:** **Immediately** (\"Forthwith\"). This is not optional and cannot be deferred.\n\n**Why it matters:** Seat brackets are critical safety equipment. Without this fix, seats could fail during turbulence, hard landings, or accidents — potentially causing injury or loss of control. The directive references an original manufacturer service bulletin (SB No. 13) and a US Federal Aviation Administration directive, indicating this addresses a known safety defect.\n\n**Key takeaway:** If you fly or maintain one of these specific helicopters, you must install this bracket now before the aircraft can legally fly."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b-2-18-seat-safety-bracket-installation","history":"/api/acts/ad-b-2-18-seat-safety-bracket-installation/history","analysis":"/api/acts/ad-b-2-18-seat-safety-bracket-installation/analysis","conflicts":"/api/acts/ad-b-2-18-seat-safety-bracket-installation/conflicts","importantCases":"/api/acts/ad-b-2-18-seat-safety-bracket-installation/important-cases","documents":"/api/acts/ad-b-2-18-seat-safety-bracket-installation/documents"}}