{"id":"F2006B07735","name":"Airworthiness Directives 2004 - Revocation and Remaking - Beagle B121 (Pup) Series Aeroplanes","slug":"airworthiness-directives-2004-revocation-and-remaking-beagle-b121-pup-series-aeroplanes","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":50467,"registerId":"commonwealth-F2006B07735-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"Airworthiness Directives 2004 - Revocation and Remaking - Beagle B121 (Pup) Series Aeroplanes","content":"Airworthiness Directives 2004\n\nI, DAVID ALAN VILLIERS, delegate of the Civil Aviation Safety\n\nAuthority, acting under subregulation 39.001 (1) of the Civil\n\nAviation Safety Regulations 1998:\n\n(a) revoke the Airworthiness Directives mentioned in\n\nSchedule 1; and\n\n(b) make, as separate instruments, each Airworthiness\n\nDirective mentioned in Schedule 1 and attached.\n\n![](image.001.png)\n\nDavid Villiers\n\nDelegate of the Civil Aviation Safety Authority\n\n20 December 2004\n\nNote: Each attached Airworthiness Directive is being re-made in exactly the\n\nsame form as appears in the latest published edition of the Directive.\n\n  \nSchedule 1 Revocation and Remaking of\n\nAirworthiness Directives\n\nBeagle B121 (Pup) Series Aeroplanes\n\nAD Name AD Number\n\nFuel Tank Modification - CANCELLED AD/BEA 121/1\n\nRudder Control Torque Tubes AD/BEA 121/2\n\nEngine Bearers AD/BEA 121/3\n\nDual Throttle Control AD/BEA 121/4\n\nRudder Control Lever Assembly P/N BE 45.10193 AD/BEA 121/5 Amdt 1\n\nFuel Tank Non-Return Valves AD/BEA 121/6\n\nElevator Torque Tubes AD/BEA 121/7 Amdt 1\n\nRudder Control Torque Tubes AD/BEA 121/8 Amdt 3\n\nBonding Points AD/BEA 121/9\n\nRudder Drain Hole AD/BEA 121/10\n\nFuel Tanks AD/BEA 121/11\n\nFront Seat Restraint Installation AD/BEA 121/12\n\nInternal Door Lock Operating Handle AD/BEA 121/13\n\nFuselage/Mainplane Attachments AD/BEA 121/14 Amdt 3\n\nFlap Actuating Lever Assemblies AD/BEA 121/15\n\nFuselage/Mainplane Attachments AD/BEA 121/16 Amdt 1\n\nNosewheel Steering Mechanism AD/BEA 121/17\n\nRudder Control Lever AD/BEA 121/18\n\nRudder Pedal Anchorages AD/BEA 121/19\n\nThrottle Cable Assembly AD/BEA 121/20\n\nNose Undercarriage and Rudder Control System AD/BEA 121/21\n\nWing Spar Web AD/BEA 121/22 Amdt 1\n\nEngine Mounting Structure AD/BEA 121/23\n\nFuselage Angle, Diaphragm and Flange at Tailplane Spar Attachments AD/BEA 121/24\n\nControl Rod End Fittings AD/BEA 121/25\n\nRudder Control Tube Bolt AD/BEA 121/26\n\nControl Column Handgrips AD/BEA 121/27 Amdt 2\n\nWing to Fuselage Main Spar Attachment Fitting AD/BEA 121/28\n\nAircraft Fatigue Life AD/BEA 121/29\n\nBrake Torque Tube Assembly AD/BEA 121/30\n\nMain Spar Doubler at Main Landing Gear Attachment and Wing to Fuselage AD/BEA 121/31 Amdt 1","sortOrder":0}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"summary":{"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"The airworthiness directives are remade in identical form with no alteration to their requirements or content."},"complexity_factors":["revocation and remaking of multiple airworthiness directives","narrow scope limited to one aircraft model"],"plain_english_summary":"This instrument revokes a bundled set of Airworthiness Directives for Beagle B121 (Pup) aeroplanes and remakes each directive as a separate instrument, without changing technical content or compliance obligations.  \n\nIt affects any person who owns, operates or maintains a Beagle B121 in Australia—the same inspection, modification and maintenance requirements remain legally valid under current regulations."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Scope unchanged — the instrument revokes listed Airworthiness Directives and re-makes them in the same form as their latest published editions. No new technical requirements are introduced by this instrument; one AD is explicitly cancelled, and the rest are administrative re-issues as separate instruments."},"complexity_factors":["Authority and formality: made under subregulation 39.001(1) of the Civil Aviation Safety Regulations 1998 (single legal hook).","Number of instruments: Schedule lists 31 AD entries, increasing administrative tracking for regulators and operators.","Administrative re-issue: ADs are re-made in exactly the same form as the latest published edition (no substantive technical change indicated).","One cancellation noted: AD/BEA 121/1 marked CANCELLED, requiring attention to historical compliance records.","Multiple amendments referenced (Amdt 1/2/3): some ADs have amendment histories, which complicates version control.","Compliance burden: aircraft owners/operators must ensure continuing reference to the newly issued separate instruments (record-keeping/maintenance planning).","Low discretion: instrument performs a mechanical revocation/re-issue rather than delegating technical rulemaking."],"plain_english_summary":"This instrument, signed by a CASA delegate under subregulation 39.001(1), revokes a list of airworthiness directives for Beagle B121 (Pup) aeroplanes and re-issues each one as a separate instrument. One directive is explicitly cancelled and the re-issued directives are stated to be identical to their latest published forms. Owners and operators of Beagle B121 aircraft are affected because their continuing airworthiness obligations will reference the re-made directives; the change is administrative and preserves existing technical requirements."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This instrument maintains identical scope to the original directives. The 'revoke and remake' mechanism is purely procedural to ensure proper legislative authority under current regulations. The note explicitly states each directive is re-made 'in exactly the same form' as previously published."},"complexity_factors":["Single, clear purpose: revoke and remake existing instruments without substantive change","Minimal conditional logic — only two operative paragraphs (a) and (b)","No defined terms section within this instrument itself (relies on external CASR definitions)","Tabular schedule format makes the 31 directives easy to reference","Cross-reference to Civil Aviation Safety Regulations 1998 (subregulation 39.001(1)) for authority, but no complex internal cross-referencing","Note clarifies no substantive change, reducing interpretive burden","Technical complexity exists in the *attached* directives (not reproduced here), but the instrument itself is procedural"],"plain_english_summary":"This is a technical aviation safety instrument that **revokes and re-makes 31 airworthiness directives** for a specific type of light aircraft called the **Beagle B121 (Pup)**.\n\n**What it does:**\n- **Revokes** (cancels) the existing safety rules for these planes\n- **Re-makes** them as fresh, legally current instruments in exactly the same form as before\n\n**Why this matters:**\nAirworthiness directives are **mandatory safety fixes** issued when aircraft have dangerous defects. Owners and operators must comply with them or the aircraft cannot fly legally. This \"revoke and remake\" process is a housekeeping exercise to keep the legal instruments technically valid and properly authorised under current regulations — it doesn't change the actual safety requirements.\n\n**Who it affects:**\n- Owners and operators of Beagle B121 Pup aircraft (a British light aircraft from the 1960s-70s)\n- Aircraft maintenance engineers who work on these planes\n- The Civil Aviation Safety Authority (CASA), which enforces compliance\n\n**The safety issues covered:**\nThe directives address serious mechanical problems including:\n- Fuel tank modifications and valve failures\n- Rudder and elevator control system defects (critical for steering and pitch control)\n- Engine mounting and bearer failures\n- Wing spar cracks and attachment failures (structural integrity)\n- Landing gear and brake problems\n- Control column and throttle cable defects\n- Fatigue life limits for the airframe\n\nOne directive (AD/BEA 121/1 on fuel tank modification) was already cancelled and remains so."}},"importantCases":[],"_links":{"self":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-beagle-b121-pup-series-aeroplanes","history":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-beagle-b121-pup-series-aeroplanes/history","analysis":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-beagle-b121-pup-series-aeroplanes/analysis","conflicts":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-beagle-b121-pup-series-aeroplanes/conflicts","importantCases":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-beagle-b121-pup-series-aeroplanes/important-cases","documents":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-beagle-b121-pup-series-aeroplanes/documents"}}