{"id":"F2006B06268","name":"AD/PL 12/3 Amdt 1 - Longitudinal Trim Augmenter","slug":"ad-pl-12-3-amdt-1-longitudinal-trim-augmenter","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47280,"registerId":"commonwealth-F2006B06268-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PL 12/3 Amdt 1 - Longitudinal Trim Augmenter","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 12/3\n\nAmdt 1\n\n\nLongitudinal Trim Augmenter 2/89\n\n \n\nApplicability: PL 12, PL 12U, PL 12/T320, PL 12/T300. Requirement:  Action in accordance with Transavia SB No. 16. Compliance:               At intervals not exceeding 100 hours time in service.\n\nBackground:  This Amendment deletes “All models” from the “Applicability” to reflect the design and manufacturing improvements in the later model aircraft.\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":true,"description":"The amendment narrows the scope compared to the original directive. The original AD/PL 12/3 applied to 'All models' of the Transavia PL 12 series. Amendment 1 restricts applicability to only four specific older models (PL 12, PL 12U, PL 12/T320, PL 12/T300), explicitly excluding later models that incorporated design and manufacturing improvements. This represents a reduction in regulatory scope rather than expansion."},"complexity_factors":["Extremely short document (approximately 150 words of substantive content)","Only 4 defined model variants in applicability section","Single compliance requirement with clear time interval (100 hours)","No cross-references to other legislation or regulations beyond the parent Civil Aviation Regulations 1998","Simple amendment structure — only deletes text, does not add new conditional logic","No nested exceptions or conditional triggers","Single action required (follow manufacturer's service bulletin)"],"plain_english_summary":"This is an **Airworthiness Directive** (AD) — essentially a mandatory safety notice issued by Australia's Civil Aviation Safety Authority (CASA) that requires aircraft owners or operators to take specific action to fix or check for a safety issue.\n\n**What it does:**\nThis directive applies to certain Transavia PL 12 series aeroplanes (agricultural aircraft often used for crop dusting). It requires owners/operators to follow a specific service bulletin (SB No. 16) regarding the **longitudinal trim augmenter** — a device that helps control the aircraft's pitch stability (whether the nose points up or down).\n\n**Who it affects:**\n- Owners and operators of specific Transavia PL 12 models: PL 12, PL 12U, PL 12/T320, and PL 12/T300\n- **Not** the later models that have design improvements (this is the key change in this amendment)\n\n**What action is required:**\n- Follow the manufacturer's Service Bulletin No. 16\n- Do this check/maintenance **every 100 hours of flight time** (\"time in service\")\n\n**Why this amendment matters:**\nThe original directive said \"All models\" of the PL 12 series. This amendment (Amendment 1) **narrows the scope** — it removes \"All models\" and lists only the specific older models that actually need this safety check. The newer models have design improvements that make this particular safety check unnecessary, so they no longer have to comply.\n\n**In short:** This is a paperwork update that removes unnecessary regulatory burden from newer aircraft while keeping the safety requirement in place for older models that actually need it."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"The amendment narrows the directive's scope. The original wording included \"All models\"; the amendment replaces that with a specific list (PL 12, PL 12U, PL 12/T320, PL 12/T300), thereby excluding later models that were previously covered. This reduces the number of aircraft subject to the recurring 100‑hour work requirement (Background; Applicability)."},"complexity_factors":["Narrow, specific applicability (four listed models) reduces scope complexity (Applicability).","Mandates compliance with an external technical document (Transavia SB No. 16); the AD does not include procedural detail, so compliance depends on that external material (Requirement).","Recurring fixed compliance interval (every ≤100 hours TIS) creates ongoing operational and record-keeping obligations (Compliance).","Amendment changes scope by removing the prior \"All models\" wording; tracking which airframes are affected requires fleet-level identification (Background).","Technical work likely requires licensed maintenance organisations and possible parts supply, adding operational complexity not resolved in the AD itself (Requirement)."],"plain_english_summary":"The airworthiness directive requires owners/operators of four older Transavia PL 12 variants (PL 12, PL 12U, PL 12/T320, PL 12/T300) to perform and repeat the maintenance/inspection specified in Transavia Service Bulletin No. 16 at intervals not exceeding 100 hours TIS. \n\nBy removing the prior blanket “All models” applicability, the amendment narrows the obliged fleet, concentrating recurring costs, scheduling and record‑keeping burdens on the listed older models while excluding later improved variants."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pl-12-3-amdt-1-longitudinal-trim-augmenter","history":"/api/acts/ad-pl-12-3-amdt-1-longitudinal-trim-augmenter/history","analysis":"/api/acts/ad-pl-12-3-amdt-1-longitudinal-trim-augmenter/analysis","conflicts":"/api/acts/ad-pl-12-3-amdt-1-longitudinal-trim-augmenter/conflicts","importantCases":"/api/acts/ad-pl-12-3-amdt-1-longitudinal-trim-augmenter/important-cases","documents":"/api/acts/ad-pl-12-3-amdt-1-longitudinal-trim-augmenter/documents"}}