{"id":"F2006B05412","name":"AD/PA-20/8 - Tail Brace Streamline Tie Rods - Inspection","slug":"ad-pa-20-8-tail-brace-streamline-tie-rods-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":46066,"registerId":"commonwealth-F2006B05412-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-20/8 - Tail Brace Streamline Tie Rods - 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-20 (Pacer) Series Aeroplanes\n\n \n\nAD/PA-20/8 Tail Brace Streamline Tie Rods - Inspection NK\n\nApplicability: All models. Document: 1. Piper SB No 183; or\n\n2. FAA AD 60-1-7.\n\n \n\nCompliance: At intervals not exceeding 120 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","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive focused specifically on tail brace tie rod inspections for one aircraft series. It has not expanded beyond its original narrow technical purpose."},"complexity_factors":["Extremely short document — approximately 150 words of substantive content","Only 2 defined references (Piper SB No 183 and FAA AD 60-1-7)","Single, unambiguous compliance requirement (120-hour interval)","No nested conditions, exceptions, or cross-references to other legislation","Straightforward applicability (\"All models\") with no exclusions","No interpretation section or defined terms within the document itself"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations 1998.\n\n**What it does:** It requires owners and operators of **Piper PA-20 (Pacer) series aeroplanes** to inspect the **tail brace streamline tie rods** (structural support rods at the rear of the aircraft) at regular intervals.\n\n**Who it affects:** Anyone who owns, operates, or maintains a Piper PA-20 aircraft in Australia.\n\n**What must be done:**\n- **Inspection frequency:** Every 120 hours of \"time in service\" (actual flying hours, not time on the ground)\n- **Technical reference:** Follow either Piper Service Bulletin No. 183 or the equivalent US Federal Aviation Administration AD 60-1-7 for the exact inspection procedure\n\n**Why it matters:** These tie rods are critical structural components. If they fail, the aircraft's tail could become unstable or detach — with catastrophic consequences. This AD ensures potential defects are caught before they cause accidents.\n\n**Key point:** This is not optional. Compliance is legally mandatory for airworthiness certification."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive, as presented, imposes a recurring inspection obligation on all Piper PA-20 models and points to two external documents for technical detail. The excerpt does not indicate any expansion or narrowing of scope from an earlier version; it states applicability as 'All models' and a compliance interval of 'at intervals not exceeding 120 hours time in service.' (Applicability; Compliance; Document)"},"complexity_factors":["Single, narrowly focused requirement (recurring inspection) which reduces structural complexity.","References external technical documents (Piper SB No.183 or FAA AD 60-1-7) for inspection method and remedial actions, requiring users to consult additional material.","Terminology and compliance metric use technical aviation term '120 hours time in service (TIS)' which requires operational tracking.","The directive text does not itself state inspection procedures, pass/fail criteria, or consequences for non-compliance; those items are deferred to the referenced documents, adding practical complexity.","Applicability is broad ('All models' of the PA-20 series) which increases operational coverage but not legal complexity."],"plain_english_summary":"This Airworthiness Directive (AD/PA‑20/8) requires owners/operators of all Piper PA‑20 (Pacer) aeroplanes to inspect the tail brace streamline tie rods at intervals not exceeding 120 hours TIS, using the procedures in Piper Service Bulletin No.183 or FAA AD 60‑1‑7. It creates a recurring maintenance obligation—operators must obtain the referenced documents, carry out inspections and any repairs, incurring ongoing costs and potential impacts on scheduling and aircraft availability."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-20-8-tail-brace-streamline-tie-rods-inspection","history":"/api/acts/ad-pa-20-8-tail-brace-streamline-tie-rods-inspection/history","analysis":"/api/acts/ad-pa-20-8-tail-brace-streamline-tie-rods-inspection/analysis","conflicts":"/api/acts/ad-pa-20-8-tail-brace-streamline-tie-rods-inspection/conflicts","importantCases":"/api/acts/ad-pa-20-8-tail-brace-streamline-tie-rods-inspection/important-cases","documents":"/api/acts/ad-pa-20-8-tail-brace-streamline-tie-rods-inspection/documents"}}