{"id":"F2006B05896","name":"AD/PA-34/25 - Vertical Fin and Stabilator Attachments - Inspection","slug":"ad-pa-34-25-vertical-fin-and-stabilator-attachments-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135944,"registerId":"commonwealth-F2006B05896-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-34/25 - Vertical Fin and Stabilator Attachments - 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)  Piper PA-34 (Seneca) Series Aeroplanes\n\n \n\nAD/PA-34/25 Vertical Fin and Stabilator Attachments - Inspection\n\n\n1/78\n\n \n\nApplicability: All model PA34-200 with S/Nos. 34-E4, 34-7250001 to 34-7450220. All model PA- 34-200T with S/Nos. 34-7570001 to 34-7770441.\n\n \n\nDocument: Piper SB No. 579.\n\n \n\nCompliance: Part 1 - Within 25 hours time in service after 16 January 1978. Part II - Within 100 hours time in service after 16 January 1978.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\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, targeted safety directive focused on a specific airworthiness issue (tail attachment integrity) for specific aircraft. It has not expanded beyond its original purpose."},"complexity_factors":["Very short document (approximately 150 words)","Only 2 defined applicability criteria (specific aircraft models and serial number ranges)","Simple two-part compliance structure with clear timeframes","Single cross-reference to manufacturer service bulletin (Piper SB No. 579)","No nested exceptions, conditional logic, or interpretive provisions","Straightforward command structure: applies to X, do Y by Z date"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It requires owners and operators of specific Piper PA-34 Seneca aircraft to inspect critical parts of the tail section.\n\n**What it does:**\n- **Mandates inspections** of the **vertical fin** (the tall fin at the back of the plane) and **stabilator attachments** (the movable horizontal surface that controls pitch — think of it as the part that helps the plane go up and down).\n- These inspections check for cracks, corrosion, or other damage that could cause these parts to fail in flight.\n\n**Who it affects:**\n- Owners and operators of specific Piper PA-34 aircraft with particular serial numbers:\n  - **PA34-200 models**: Serial numbers 34-E4, and 34-7250001 through 34-7450220\n  - **PA-34-200T models**: Serial numbers 34-7570001 through 34-7770441\n\n**When compliance is required:**\n- **Part 1**: Within 25 hours of flying time after 16 January 1978\n- **Part 2**: Within 100 hours of flying time after 16 January 1978\n\n**Why it matters:**\nTail section failures are catastrophic. This AD prevents accidents by catching structural problems before they cause the vertical fin or stabilator to detach. The reference to \"Piper SB No. 579\" means CASA is adopting the manufacturer's own service bulletin as a mandatory requirement.\n\n**In short:** If you own one of these specific Piper Seneca planes, you must get these tail inspections done on schedule — it's not optional, and it's for safety."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The provided text sets a specific, limited scope (particular PA-34-200 and PA-34-200T serial numbers) and prescribes inspection deadlines and a referenced service bulletin. The excerpt contains no indication that the AD changes or expands that scope from any earlier or original intent; it states applicability and compliance requirements without reference to a prior wider or narrower scope."},"complexity_factors":["Narrow applicability defined by specific aircraft models and serial numbers (Applicability)","Reliance on an external technical document (Piper SB No. 579) for inspection procedures and corrective actions (Document: Piper SB No. 579)","Two-part compliance timetable with short, different time-in-service deadlines (Compliance: Part I and Part II)","Lack of procedural detail and acceptance criteria in the provided AD excerpt increases operational uncertainty (Document; Compliance)","Vintage date reference that operators must interpret correctly for time-in-service calculations (Compliance: reference to 16 January 1978)"],"plain_english_summary":"This AD from CASA mandates inspections of the vertical fin and stabilator attachments on certain Piper PA-34-200 and PA-34-200T aeroplanes identified by serial number, requiring operators to follow Piper Service Bulletin No. 579. It imposes short, specific compliance windows and leaves owners/operators responsible for arranging and funding inspections and any repairs. Compliance is mandatory and enforceable."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-34-25-vertical-fin-and-stabilator-attachments-inspection","history":"/api/acts/ad-pa-34-25-vertical-fin-and-stabilator-attachments-inspection/history","analysis":"/api/acts/ad-pa-34-25-vertical-fin-and-stabilator-attachments-inspection/analysis","conflicts":"/api/acts/ad-pa-34-25-vertical-fin-and-stabilator-attachments-inspection/conflicts","importantCases":"/api/acts/ad-pa-34-25-vertical-fin-and-stabilator-attachments-inspection/important-cases","documents":"/api/acts/ad-pa-34-25-vertical-fin-and-stabilator-attachments-inspection/documents"}}