{"id":"F2006B06266","name":"AD/PL 12/2 - Aerodynamic Surfaces - Modification","slug":"ad-pl-12-2-aerodynamic-surfaces-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47274,"registerId":"commonwealth-F2006B06266-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PL 12/2 - Aerodynamic Surfaces - Modification","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)  Transavia PL 12 Series Aeroplanes\n\n \n\nAD/PL 12/2 Aerodynamic Surfaces - Modification 10/68\n\nApplicability:  All models. Document:  Transavia SB No. 14. Compliance: Before 1 January 1969.\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\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The supplied text sets an explicit, limited scope: it applies to all Transavia PL 12 series aeroplanes, mandates compliance with Transavia SB No. 14, and sets a deadline (before 1 January 1969). The document includes no language indicating that the scope has been amended from an earlier version or that the applicability has been expanded or narrowed. Based on the text provided, there is no evidence the scope has changed from the instrument’s own stated requirements."},"complexity_factors":["Very short instrument with few operative clauses","Technical content is delegated to an external document (Transavia SB No. 14), requiring access to that bulletin to implement","Fixed compliance deadline (historical date) that creates a clear timing constraint","Applicability is broad within the model line (“All models”) but narrow in subject (aerodynamic surfaces modification)","No enforcement, exemption, or alternative compliance details included in the supplied text","Lack of stated rationale or technical description in the AD increases reliance on the external SB for interpretation"],"plain_english_summary":"This AD requires all Transavia PL 12 series aeroplanes to be modified in accordance with Transavia SB No. 14, with work completed before 1 January 1969. It is issued under the Commonwealth of Australia/Civil Aviation Safety Authority schedule of airworthiness directives.\n\nOwners/operators must schedule and pay for the mandated modification, relying on the referenced service bulletin for technical steps; the AD itself contains no explanation, alternatives, or enforcement details."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive from 1968 with a narrow, specific scope (aerodynamic surfaces modification for one aircraft series). There is no evidence of scope creep; it addresses exactly what it purports to address with no extraneous provisions."},"complexity_factors":["Extremely short document — only 4 substantive lines of regulatory text","No defined terms section — all terms are either common aviation terminology or reference external documents","No conditional logic or nested exceptions — simple mandatory requirement with single applicability criterion ('All models')","Single cross-reference only (to Transavia SB No. 14)","Clear, unambiguous compliance deadline with no alternative methods of compliance stated"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** issued by Australia's Civil Aviation Safety Authority (CASA) that mandates a safety modification for certain aircraft.\n\n**What it does:**\n- Requires owners/operators of **Transavia PL 12 Series aeroplanes** (all models) to carry out a specific modification to the aircraft's **aerodynamic surfaces** (the wings, tail, and other parts that generate lift and control the plane in flight).\n- The modification must be done according to **Transavia Service Bulletin No. 14** — a technical instruction document issued by the aircraft manufacturer.\n\n**Who it affects:**\n- Anyone who owns or operates a Transavia PL 12 Series aircraft in Australia.\n\n**Why it matters:**\n- Airworthiness Directives are legally binding safety orders. They are issued when CASA identifies unsafe conditions in aircraft, engines, or propellers. Compliance is mandatory — you cannot legally fly the aircraft until the work is done.\n- This particular directive had a **hard deadline of 1 January 1969**, meaning the modification had to be completed before that date to keep the aircraft airworthy.\n\n**In short:** If you had a Transavia PL 12 plane in 1968, CASA ordered you to modify its wings/tail surfaces by New Year's Day 1969, following the manufacturer's instructions, or ground the aircraft."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pl-12-2-aerodynamic-surfaces-modification","history":"/api/acts/ad-pl-12-2-aerodynamic-surfaces-modification/history","analysis":"/api/acts/ad-pl-12-2-aerodynamic-surfaces-modification/analysis","conflicts":"/api/acts/ad-pl-12-2-aerodynamic-surfaces-modification/conflicts","importantCases":"/api/acts/ad-pl-12-2-aerodynamic-surfaces-modification/important-cases","documents":"/api/acts/ad-pl-12-2-aerodynamic-surfaces-modification/documents"}}