{"id":"F2006B06760","name":"AD/SA-TP/12 - Elevator Port Control Column Installation","slug":"ad-sa-tp-12-elevator-port-control-column-installation","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114592,"registerId":"commonwealth-F2006B06760-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SA-TP/12 - Elevator Port Control Column 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)  British Aerospace (Scottish Aviation) Twin Pioneer Series Aeroplanes\n\n \n\nAD/SA-TP/12 Elevator Port Control Column Installation NK\n\nApplicability: All models.\n\n \n\nDocument: Scottish Aviation Mod. No. C719. Compliance: 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\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 addressing a specific technical modification. It has not expanded beyond its original purpose of mandating a safety modification to the elevator control system of Twin Pioneer aircraft."},"complexity_factors":["Extremely short document — only 8 substantive lines","No defined terms section (relies on external aviation terminology)","No conditional logic or exceptions","Single, unambiguous compliance requirement","Cross-reference to external technical document (Scottish Aviation Mod. No. C719) but no internal cross-referencing structure","Minimal legislative machinery — essentially a regulatory notice format rather than complex statute"],"plain_english_summary":"This is an **Airworthiness Directive** (AD) — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It requires immediate action on a specific aircraft type.\n\n**What it does:**\n- Orders owners and operators of **British Aerospace (Scottish Aviation) Twin Pioneer series aeroplanes** to install a modified elevator port control column\n- The modification is identified as **Scottish Aviation Modification No. C719**\n\n**Who it affects:**\n- Anyone who owns, operates, or maintains Twin Pioneer aircraft (all models)\n\n**Why it matters:**\n- Airworthiness Directives are legally binding safety instructions. Non-compliance means the aircraft cannot fly legally in Australia\n- The \"forthwith\" compliance requirement means this must be done immediately — not at the next scheduled maintenance\n- This likely addresses a safety-critical defect in the elevator control system (the elevator is the surface that makes the aircraft pitch up and down)\n\n**Key terms explained:**\n- **Airworthiness Directive (AD):** A mandatory regulatory notice requiring inspection, modification, or replacement of aircraft parts to address unsafe conditions\n- **Elevator port control column:** The left-hand side control mechanism in the cockpit that operates the elevator (pitch control)\n- **Forthwith:** Immediately; without delay"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument as provided specifies its scope directly: it applies to all Twin Pioneer models (\"Applicability: All models\"). The text contains no amendment history or indication that the applicability or substantive scope has been changed from an earlier statement, so there is no evidence in this document that scope has changed."},"complexity_factors":["Short, single-action directive (install a specific modification) reduces procedural complexity.","Applicability is broad but simple: covers all models (\"Applicability: All models\"), increasing the universe of affected parties.","Key technical and procedural details are external to the directive (referenced Scottish Aviation Mod. No. C719), requiring users to obtain and interpret another document.","Immediate compliance requirement (\"Compliance: Forthwith\") compresses scheduling and increases implementation urgency.","The directive text lacks procedural details on certification, record-keeping, acceptable performers, or enforcement mechanisms, creating practical implementation uncertainty."],"plain_english_summary":"This Airworthiness Directive mandates immediate installation of Scottish Aviation Modification No. C719 on all British Aerospace (Scottish Aviation) Twin Pioneer aeroplanes. It affects aircraft owners/operators (who must fund and schedule the work), maintenance organisations and engineers (who must perform it to Mod. No. C719), and the Civil Aviation Safety Authority as regulator. Compliance is required forthwith; technical details and parts are contained in the referenced modification document."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sa-tp-12-elevator-port-control-column-installation","history":"/api/acts/ad-sa-tp-12-elevator-port-control-column-installation/history","analysis":"/api/acts/ad-sa-tp-12-elevator-port-control-column-installation/analysis","conflicts":"/api/acts/ad-sa-tp-12-elevator-port-control-column-installation/conflicts","importantCases":"/api/acts/ad-sa-tp-12-elevator-port-control-column-installation/important-cases","documents":"/api/acts/ad-sa-tp-12-elevator-port-control-column-installation/documents"}}