{"id":"F2006B06270","name":"AD/PL 12/5 - Rudder Pedal Assemblies - Inspection","slug":"ad-pl-12-5-rudder-pedal-assemblies-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47287,"registerId":"commonwealth-F2006B06270-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PL 12/5 - Rudder Pedal 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\n \n\n| AD/PL 12/5 | Rudder Pedal Assemblies - Inspection | 5/69 |\n| --- | --- | --- |\n| Applicability: | All models not modified to Transavia Dwg. 7-254 Issue C or later. |  |\n| Requirement: | Inspect the rudder pedal assemblies for cracking in all welded areas. |  |\n\n\n \n\nCompliance: Within 100 hours time in service after 4 July 1969 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\n \n\n \n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument itself defines the scope: it requires inspections for all PL.12 aircraft except those modified to Transavia Dwg. 7-254 Issue C or later (Applicability). The text does not indicate that this instrument alters or narrows a previously stated scope; it simply sets the current applicability and inspection requirements."},"complexity_factors":["Narrow technical scope: single component (rudder pedal assemblies) and single defect type (cracking) specified (Requirement).","Clear applicability with a single, concrete exclusion (modified to Transavia Dwg. 7-254 Issue C or later) (Applicability).","Fixed, simple compliance interval (100 hours TIS initial and recurring) with a historical effective date (Compliance).","Limited procedural detail: inspection method, acceptance criteria and corrective actions are not specified in the text, increasing practical implementation decisions for maintenance personnel.","Operational impact depends on utilisation (inspection frequency tied to hours TIS), which is straightforward but imposes recurring costs on owners/operators."],"plain_english_summary":"What this instrument does (mechanics)\n\n- This Airworthiness Directive requires regular visual or physical inspections of the rudder pedal assemblies on Transavia PL.12 series aeroplanes for signs of cracking in all welded areas. (Requirement)\n- It applies only to PL.12 aircraft that have not been modified to Transavia Drawing 7-254 Issue C (or a later issue). Aircraft that have been modified to that drawing are excluded. (Applicability)\n- The first inspection must be done within 100 hours time-in-service after 4 July 1969, and subsequent inspections must be done at intervals not exceeding 100 hours time-in-service. (Compliance)\n\nWho this affects and who pays\n\n- The owners and operators of affected Transavia PL.12 aeroplanes are the parties required to ensure the inspections happen (Applicability; Requirement). They therefore bear the direct costs of the inspections (labour, downtime, any specialised inspection equipment) and of any repairs or replacement parts if cracks are found.\n\nWho decides and how it is implemented\n\n- The directive itself prescribes what to inspect (all welded areas of the rudder pedal assemblies) and the inspection interval (every 100 hours TIS after the initial 100‑hour deadline). It does not specify the exact inspection technique or acceptance criteria in this text — that will be determined by the operator’s maintenance organisation or maintenance engineers consistent with applicable maintenance practices. (Requirement; Compliance)\n\nBehavioural effects, incentives and trade-offs\n\n- Operators are incentivised to carry out inspections at the mandated interval to retain the aircraft’s airworthiness status and continue lawful operation. (Compliance)\n- If owners prefer not to perform recurring inspections, they have a clear, concrete alternative: modify the aircraft to Transavia Drawing 7-254 Issue C or later, which the instrument exempts from the inspection requirement. That creates an incentive to incur a one‑off modification cost to avoid ongoing inspection costs. (Applicability)\n- The directive reduces the risk of in-service failure of the rudder pedal assemblies by imposing periodic checks, at the cost of recurring maintenance time and possible repairs. Those are opportunity costs for operators (downtime, maintenance labour, parts). (Requirement; Compliance)\n\nCompliance burden, discretion and implementation risks\n\n- Compliance burden is straightforward and recurring: perform inspections every 100 flight hours and keep to the initial deadline of within 100 hours after 4 July 1969. The burden scales with aircraft utilisation (more frequent calendar inspections for high-usage aircraft). (Compliance)\n- The text leaves room for maintenance professionals to decide inspection method and repair standards, since inspection technique and corrective actions are not detailed here. That creates limited administrative discretion at the maintenance/engineering level but no discretionary exemption authority in the directive text itself. (Requirement)\n- The document does not set out required recordkeeping, acceptance criteria for cracks, or approved repair methods in this excerpt; absent those details there is implementation risk from inconsistent inspection standards across operators or maintenance organisations. (Requirement)\n\nConcrete, source-cited summary\n\n- What is required: Inspect all welded areas of the rudder pedal assemblies for cracking. (Requirement)\n- To whom it applies: All Transavia PL.12 aircraft not modified to Transavia Dwg. 7-254 Issue C or later. (Applicability)\n- When to comply: Within 100 hours TIS after 4 July 1969 and thereafter at intervals not exceeding 100 hours TIS. (Compliance)\n\n"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue safety directive from 1969 addressing a specific airworthiness concern (rudder pedal weld cracking). It has not expanded beyond its original scope; it remains a targeted inspection requirement for a specific aircraft type and specific unmodified configurations."},"complexity_factors":["Extremely short document — only 4 substantive lines of regulatory text","Single defined term: 'time in service' (standard aviation term for flight hours)","No cross-references to other legislation or regulations beyond the parent Civil Aviation Regulations 1998 citation","Simple conditional logic: applies to 'all models not modified to [specific drawing]' — a straightforward exclusion","Clear, unambiguous compliance deadline and recurring interval","No nested exceptions, no subsections, no interpretive provisions"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It applies to **Transavia PL 12 series aeroplanes** (agricultural aircraft commonly known as the \"Skyfarmer\").\n\n**What it requires:**\nOwners and operators must **inspect the rudder pedal assemblies** (the foot controls that steer the plane on the ground) for **cracks in welded joints**. This must happen:\n- **First inspection:** Within 100 hours of flying time after 4 July 1969\n- **Ongoing:** Every 100 hours of flying time thereafter\n\n**Who it affects:**\nAnyone operating a Transavia PL 12 that hasn't been upgraded to a specific modified design (Transavia Drawing 7-254 Issue C or later).\n\n**Why it matters:**\nCracked welds in rudder pedals could cause the pilot to lose directional control during takeoff, landing, or taxiing — potentially leading to runway excursions or loss of aircraft control. This AD forces proactive inspection to catch fatigue failures before they cause accidents."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pl-12-5-rudder-pedal-assemblies-inspection","history":"/api/acts/ad-pl-12-5-rudder-pedal-assemblies-inspection/history","analysis":"/api/acts/ad-pl-12-5-rudder-pedal-assemblies-inspection/analysis","conflicts":"/api/acts/ad-pl-12-5-rudder-pedal-assemblies-inspection/conflicts","importantCases":"/api/acts/ad-pl-12-5-rudder-pedal-assemblies-inspection/important-cases","documents":"/api/acts/ad-pl-12-5-rudder-pedal-assemblies-inspection/documents"}}