{"id":"F2006B03583","name":"AD/BEA 121/19 - Rudder Pedal Anchorages","slug":"ad-bea-121-19-rudder-pedal-anchorages","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43152,"registerId":"commonwealth-F2006B03583-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEA 121/19 - Rudder Pedal Anchorages","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)  Beagle B121 (Pup) Series Aeroplanes\n\n \n\nAD/BEA 121/19 Rudder Pedal Anchorages 12/77\n\nApplicability: All models.\n\n \n\nRequirement: Action in accordance with Beagle SB No. B121/73. Compliance:  Within 100 hours time in service after 31 December 1977.\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":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive from 1977 addressing a specific mechanical defect in a specific aircraft type. There is no evidence of scope creep; it remains tightly focused on rudder pedal anchorages for the Beagle B121 series."},"complexity_factors":["Extremely short document — only 4 substantive lines of regulatory text","No defined terms section — relies on external references (Beagle SB No. B121/73) for technical details","Single, clear applicability statement ('All models')","Simple conditional logic: one action required, one deadline, no exceptions or nested conditions","No cross-references to other legislation or regulations beyond the parent Civil Aviation Regulations 1998","Minimal formatting with excessive whitespace padding"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — essentially a mandatory safety notice issued by Australia's Civil Aviation Safety Authority (CASA). Think of it like a compulsory recall notice for aircraft, but issued by the regulator rather than the manufacturer.\n\n**What it does:** It requires owners and operators of **Beagle B121 (Pup) series aeroplanes** to inspect and fix the **rudder pedal anchorages** — the metal brackets that hold the foot pedals pilots use to steer the aircraft on the ground. The fix must follow the manufacturer's Service Bulletin (SB No. B121/73), which contains the technical instructions.\n\n**Who it affects:** Anyone who owns, operates, or maintains a Beagle B121 Pup aircraft in Australia.\n\n**Why it matters:** Faulty rudder pedal anchorages could cause the pedals to detach during flight or taxiing, leading to loss of directional control. This is a serious safety risk, so compliance is mandatory.\n\n**The deadline:** The work had to be done within **100 hours of flying time** after 31 December 1977. (Note: This AD dates from 1977, so for any aircraft still flying, this work should have been completed decades ago — but the AD remains on the books as a legal requirement.)"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The provided text does not indicate any change of scope from its apparent original intent. The directive applies to all Beagle B121 models (Applicability), mandates action per Beagle SB No. B121/73 (Requirement), and sets a fixed compliance window of 100 hours time in service after 31 December 1977 (Compliance). No amendments or scope-expanding provisions are visible in the excerpt."},"complexity_factors":["Short, single-purpose directive with clear applicability and deadline reduces procedural complexity.","Primary technical detail is in an external document (Beagle SB No. B121/73); that cross-reference increases practical complexity because the SB must be obtained and interpreted.","Compliance timing (100 hours after a specific date) creates a concrete scheduling constraint that may interact with operational calendars.","No alternative compliance procedures, enforcement steps or record-keeping requirements are set out in the provided text, so readers must consult wider regulatory material for full implementation guidance."],"plain_english_summary":"What this instrument changes, mechanically:\n\n- It imposes a mandatory maintenance action for Beagle B121 (Pup) series aeroplanes. The directive applies to all models of that type (Applicability).\n- The required work is whatever is described in Beagle Service Bulletin No. B121/73; the AD orders operators to carry out the SB action (Requirement).\n- The work must be completed within 100 hours time in service after 31 December 1977 (Compliance).\n\nStated purpose and how that is implemented:\n\n- The title and text identify the subject as \"Rudder Pedal Anchorages\", so the directive’s stated aim is to address the rudder pedal anchorages on the Beagle B121 series. The AD implements that aim by mandating the work set out in the Beagle SB No. B121/73 (Requirement).\n\nWho decides, who pays, and what changes in behaviour:\n\n- Decision-maker: The Civil Aviation Safety Authority (identified in the header) issues the AD and thereby requires compliance (header).\n- Specification of the remedial steps: The Beagle service bulletin (SB No. B121/73) provides the technical detail; the AD makes following that SB compulsory for the affected aeroplanes (Requirement).\n- Who pays: Aircraft owners/operators must arrange and pay for the work called for in the service bulletin. The AD does not allocate funds or supply parts; it simply mandates compliance (Requirement).\n- Behaviour change: Operators must schedule the specified inspection/repair/modification for the rudder pedal anchorages and complete it within the 100-hour compliance window after 31 December 1977 (Compliance).\n\nPractical consequences, incentives and trade-offs to watch for:\n\n- Compliance burden (source): The AD fixes a compliance deadline and refers to an external SB for technical actions, so the operator’s burden is to obtain the SB details, secure parts and labour, and take the aircraft out of service as needed (Requirement; Compliance).\n- Implementation risk: The AD does not include the SB text in itself; operators need access to Beagle SB No. B121/73 to know the exact tasks and parts. If parts or authorised labour are scarce, meeting the 100-hour window could be difficult (Requirement; Compliance).\n- Who benefits and who bears cost: The direct payers are aircraft owners/operators; providers of maintenance and parts are the likely recipients of the work and therefore of concentrated revenue from it (Applicability; Requirement). The AD text itself does not allocate subsidies or reimbursements.\n- Effect on private enterprise and competition: The AD creates demand for a specific maintenance task. Independent maintenance organisations that can perform the SB work are able to compete for that work; the directive does not, in the text provided, limit which approved maintenance organisations may carry out the work (Requirement). The AD does constrain operators’ freedom to defer or refuse the SB action without risking non‑compliance.\n- Compliance verification and enforcement: The AD sets the obligation and deadline but does not, in the excerpt provided, state the enforcement mechanism or record-keeping required; those are governed elsewhere in the regulatory framework (the header identifies the Civil Aviation Regulations and the Civil Aviation Safety Authority as the relevant regulatory context).\n\nTrade-offs and opportunity costs:\n\n- Operators must divert resources (labour, downtime, parts cost) to meet the AD within the prescribed time window, which may delay other planned work or operations (Compliance).\n- The AD channels demand to maintenance providers able to carry out the SB work. The directive does not specify preferred suppliers or impose additional contracting requirements in the text provided (Requirement).\n\nNotes on discretion and alternatives:\n\n- The AD requires action \"in accordance with\" the named service bulletin; the text does not set out alternative methods of compliance or exemptions. Any alternative compliance path or extension would depend on processes not shown in this excerpt (Requirement)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bea-121-19-rudder-pedal-anchorages","history":"/api/acts/ad-bea-121-19-rudder-pedal-anchorages/history","analysis":"/api/acts/ad-bea-121-19-rudder-pedal-anchorages/analysis","conflicts":"/api/acts/ad-bea-121-19-rudder-pedal-anchorages/conflicts","importantCases":"/api/acts/ad-bea-121-19-rudder-pedal-anchorages/important-cases","documents":"/api/acts/ad-bea-121-19-rudder-pedal-anchorages/documents"}}