{"id":"F2006B06255","name":"AD/PL 12/1 Amdt 2 - Nose Landing Gear Upper and Lower Pivot Support Assemblies - Inspection","slug":"ad-pl-12-1-amdt-2-nose-landing-gear-upper-and-lower-pivot-support-assemblies-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47240,"registerId":"commonwealth-F2006B06255-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PL 12/1 Amdt 2 - Nose Landing Gear Upper and Lower Pivot Support Assemblies - Inspection","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 12/1\n\nAmdt 2\n\n\nNose Landing Gear Upper and Lower Pivot Support Assemblies - Inspection\n\n\n9/73\n\n \n\nApplicability: All models.\n\n \n\nRequirement: Thoroughly clean and inspect the nose landing gear upper and lower pivot support assemblies for cracking in the area of the welds using a 6X magnification lens.\n\n \n\nCompliance: Within 10 hours time in service after 10 September 1973 and thereafter at intervals not exceeding 100 hours time in service.\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 Airworthiness Directive maintaining its original narrow scope — mandating specific inspections on a particular aircraft component. Amendment 2 appears to be a routine update (possibly editorial or to extend/confirm applicability) without expansion beyond the original safety purpose of preventing nose landing gear failure."},"complexity_factors":["Single, discrete maintenance task with no conditional logic or exceptions","Only one defined applicability criterion ('All models')","No cross-references to other legislation or technical standards","Straightforward compliance timeline (initial + recurring interval)","Simple technical requirement with explicit inspection method (6X magnification)","Total length is approximately 150 words"],"plain_english_summary":"This is an **Airworthiness Directive** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) that requires owners and operators of specific aircraft to perform specific maintenance checks.\n\n**What it does:**\n- Requires inspection of the **nose landing gear** (the front wheel assembly) on **Transavia PL 12 Series aeroplanes** — a type of agricultural aircraft also known as the \"Skyfarmer\"\n- Specifically targets the **upper and lower pivot support assemblies** — metal brackets that allow the nose wheel to turn and absorb landing forces\n- Mandates looking for **cracks around the welded joints** using a magnifying glass (6X magnification)\n\n**Who it affects:**\n- Owners and operators of all Transavia PL 12 model aircraft\n- Licensed aircraft maintenance engineers who perform the work\n\n**Why it matters:**\nCracks in landing gear pivot supports can lead to **catastrophic failure during landing or taxiing** — potentially causing loss of control, runway excursions, or collapse of the aircraft. The directive was issued after safety concerns emerged (original date 1973, with this being Amendment 2). The recurring 100-hour inspection interval ensures ongoing monitoring of this critical fatigue-prone area.\n\n**Key requirements:**\n- **Initial compliance:** Within 10 flight hours after 10 September 1973\n- **Ongoing:** Repeat inspection every 100 flight hours\n- **Method:** Clean thoroughly, inspect with 6X magnification lens"},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The supplied text does not include any information indicating that the scope of applicability or the required inspections was changed from an earlier or original version. The directive as presented applies to \"All models\" of Transavia PL 12 series aeroplanes and sets a single inspection requirement and schedule (Requirement; Compliance). No textual comparison to a prior scope is provided in this document."},"complexity_factors":["Narrow and specific technical requirement: single component group (nose landing gear upper and lower pivot support assemblies) and a single defect to look for (cracking in weld areas). (Requirement.)","Prescribed inspection method is simple and low-technology: cleaning plus visual inspection with a 6X magnification lens. (Requirement.)","Clear flight-hour compliance schedule with an initial short window and a fixed recurrent interval (10 hours initial window after a specified date; 100 hours recurring). (Compliance.)","Absence of remedial instructions or follow-up procedure in the text increases operational discretion and creates ambiguity around next steps if cracking is found.","Historic fixed date referenced (10 September 1973) narrows context but does not add procedural complexity to the inspection itself. (Compliance.)"],"plain_english_summary":"This CASA airworthiness directive requires operators of Transavia PL 12 aeroplanes to regularly clean and inspect the nose landing gear upper and lower pivot support assemblies for weld-area cracking using a 6× magnification lens. The first check was mandated shortly after 10 September 1973 and must be repeated at intervals tied to flight hours, imposing recurring maintenance time and inspection costs on operators and their maintenance providers."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pl-12-1-amdt-2-nose-landing-gear-upper-and-lower-pivot-support-assemblies-inspection","history":"/api/acts/ad-pl-12-1-amdt-2-nose-landing-gear-upper-and-lower-pivot-support-assemblies-inspection/history","analysis":"/api/acts/ad-pl-12-1-amdt-2-nose-landing-gear-upper-and-lower-pivot-support-assemblies-inspection/analysis","conflicts":"/api/acts/ad-pl-12-1-amdt-2-nose-landing-gear-upper-and-lower-pivot-support-assemblies-inspection/conflicts","importantCases":"/api/acts/ad-pl-12-1-amdt-2-nose-landing-gear-upper-and-lower-pivot-support-assemblies-inspection/important-cases","documents":"/api/acts/ad-pl-12-1-amdt-2-nose-landing-gear-upper-and-lower-pivot-support-assemblies-inspection/documents"}}