{"id":"F2006B05910","name":"AD/PA-34/4 - Stabilator - Inspection and Drilling of Drain Holes","slug":"ad-pa-34-4-stabilator-inspection-and-drilling-of-drain-holes","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135978,"registerId":"commonwealth-F2006B05910-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-34/4 - Stabilator - Inspection and Drilling of Drain Holes","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-34/4 Stabilator - Inspection and Drilling of Drain Holes 9/72\n\nApplicability: Model PA-34-200. Document:  Piper SL No. 615.\n\nCompliance: Within 100 hours time in service after 29 September 1972.\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\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1866},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This directive maintains its original narrow technical scope. It was issued specifically to address water drainage issues in the PA-34-200 stabilator design and has not expanded to cover additional aircraft models, components, or maintenance requirements beyond the original inspection and drilling mandate."},"complexity_factors":["Single paragraph directive with no interpretation section or defined terms","Narrow applicability limited to one specific aircraft model (PA-34-200)","Single compliance action (inspect and drill drain holes)","Straightforward time-based compliance trigger (100 hours time in service)","Only one external reference document (Piper Service Letter No. 615)","No conditional logic, exceptions, or nested provisions"],"plain_english_summary":"**What this does:** This Airworthiness Directive mandates a safety modification for specific Piper aircraft to prevent control system failures. Owners must inspect the **stabilator** (the moveable tail surface that controls the aircraft's pitch) and drill drain holes to allow water to escape.\n\n**Who it affects:** Owners and operators of **Piper PA-200 model aircraft** (part of the Seneca series).\n\n**Key requirements:**\n* **Inspection:** Examine the stabilator structure following the manufacturer's guidelines (Piper Service Letter No. 615)\n* **Modification:** Drill drain holes at specified locations to prevent water trapping\n* **Timeline:** Complete the work within 100 hours of flight time after the directive took effect\n\n**Why it matters:** Without drain holes, water can accumulate inside the stabilator structure, causing corrosion or freezing at altitude. This could jam the control surface, making it impossible to control the aircraft's nose-up or nose-down movement, creating a serious flight safety hazard."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-34-4-stabilator-inspection-and-drilling-of-drain-holes","history":"/api/acts/ad-pa-34-4-stabilator-inspection-and-drilling-of-drain-holes/history","analysis":"/api/acts/ad-pa-34-4-stabilator-inspection-and-drilling-of-drain-holes/analysis","conflicts":"/api/acts/ad-pa-34-4-stabilator-inspection-and-drilling-of-drain-holes/conflicts","importantCases":"/api/acts/ad-pa-34-4-stabilator-inspection-and-drilling-of-drain-holes/important-cases","documents":"/api/acts/ad-pa-34-4-stabilator-inspection-and-drilling-of-drain-holes/documents"}}