{"id":"F2006B05448","name":"AD/PA-23/15 - Stabiliser Attachment Fittings - Replacement of P/N 17093-00 with P/N 17093-03","slug":"ad-pa-23-15-stabiliser-attachment-fittings-replacement-of-p-n-17093-00-with-p-n-17093-03","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":46186,"registerId":"commonwealth-F2006B05448-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-23/15 - Stabiliser Attachment Fittings - Replacement of P/N 17093-00 with P/N 17093-03","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-23 (Apache and Aztec) Series Aeroplanes\n\n \n\nAD/PA-23/15 Stabiliser Attachment Fittings - Replacement NK\n\nof P/N 17093-00 with P/N 17093-03\n\nApplicability: Model PA-23 with S/Nos. 23-1 to 23-1219. Document:  1. Piper SB No. 160; or\n\n2. FAA AD 58-1-6.\n\n \n\nCompliance: Forthwith.\n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive mandates replacement of P/N 17093-00 with P/N 17093-03 for PA-23 aircraft S/N 23-1 to 23-1219 and requires immediate compliance, as stated. Nothing in the text indicates an expansion or narrowing of that scope beyond the parts, aircraft serial numbers, and immediate compliance requirement already specified (Title; Applicability; Compliance)."},"complexity_factors":["Narrow technical scope limited to a single part-number replacement (Title).","Immediate compliance requirement increases operational urgency but not procedural complexity (Compliance).","Applicability is specific and bounded by aircraft model and serial-number range (Applicability).","Procedural steps are delegated to external technical documents (Piper SB No. 160 or FAA AD 58-1-6), requiring operators to obtain and follow those sources (Document).","No detailed procedural, timing, or exemption provisions in the directive itself, shifting complexity to implementing documents (Document; Compliance)."],"plain_english_summary":"The directive mandates immediate replacement of the stabiliser attachment fitting P/N 17093-00 with P/N 17093-03 on Piper PA-23 aircraft serials 23-1 through 23-1219, to maintain airworthiness. Owners/operators must arrange and fund the replacement forthwith, following the procedures in Piper Service Bulletin No. 160 or FAA AD 58-1-6. It creates an immediate legal obligation and potential costs, downtime and parts‑availability risks for the affected operators."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific mechanical defect in a defined aircraft population. It has not expanded beyond its original purpose of mandating a part replacement for safety reasons."},"complexity_factors":["Extremely short document (under 200 words)","Only 2 defined terms implicitly used (P/N = Part Number, S/Nos = Serial Numbers)","No cross-references to other legislation or regulations beyond the two technical documents","Single, unambiguous compliance requirement with no exceptions or conditional logic","Clear applicability criteria (specific model range by serial number)","No nested definitions or 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).\n\n**What it does:**\nIt requires owners and operators of specific Piper PA-23 aircraft (Apache and Aztec models) to replace a particular stabiliser attachment fitting part. The old part number (P/N 17093-00) must be swapped out for a newer, modified version (P/N 17093-03).\n\n**Who it affects:**\nAnyone who owns or operates a Piper PA-23 aircraft with serial numbers 23-1 through 23-1219. These are older twin-engine propeller aircraft.\n\n**Why it matters:**\nStabiliser attachment fittings are critical structural components that help keep the aircraft's tail stable during flight. If these fittings fail, the pilot could lose control of the aircraft. This directive addresses a known safety defect — likely discovered through incidents, inspections, or manufacturer analysis — and mandates immediate action to prevent accidents.\n\n**Compliance deadline:**\n\"Forthwith\" means **immediately** — there's no grace period. The replacement must be done before the aircraft flies again.\n\n**Technical references:**\nThe directive points to two documents for guidance on how to perform the replacement:\n- Piper Service Bulletin No. 160 (from the manufacturer)\n- FAA AD 58-1-6 (the equivalent US safety order)"}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-23-15-stabiliser-attachment-fittings-replacement-of-p-n-17093-00-with-p-n-17093-03","history":"/api/acts/ad-pa-23-15-stabiliser-attachment-fittings-replacement-of-p-n-17093-00-with-p-n-17093-03/history","analysis":"/api/acts/ad-pa-23-15-stabiliser-attachment-fittings-replacement-of-p-n-17093-00-with-p-n-17093-03/analysis","conflicts":"/api/acts/ad-pa-23-15-stabiliser-attachment-fittings-replacement-of-p-n-17093-00-with-p-n-17093-03/conflicts","importantCases":"/api/acts/ad-pa-23-15-stabiliser-attachment-fittings-replacement-of-p-n-17093-00-with-p-n-17093-03/important-cases","documents":"/api/acts/ad-pa-23-15-stabiliser-attachment-fittings-replacement-of-p-n-17093-00-with-p-n-17093-03/documents"}}