{"id":"F2006B05790","name":"AD/PA-31/84 - Elevator Structure - Inspection and Modification","slug":"ad-pa-31-84-elevator-structure-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135688,"registerId":"commonwealth-F2006B05790-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-31/84 - Elevator Structure - Inspection and Modification","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-31 Series Aeroplanes\n\n \n\n![](image.002.png)AD/PA-31/84 Elevator Structure - Inspection and Modification 8/2001\n\nRequirement: CANCELLED.\n\n \n\nBackground: The requirement of this Directive is addressed by AD/PA-31/129.\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\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":1,"scope_assessment":{"changed":false,"description":"This is a cancellation instrument that explicitly references its replacement. The scope has not expanded; rather, the directive has been superseded and its requirements transferred to AD/PA-31/129."},"complexity_factors":["Document is a cancellation notice with only 2 substantive sentences","No defined terms, cross-references, or conditional logic","Single operational instruction: 'CANCELLED'","Background explanation is one sentence referencing replacement directive","No technical specifications, procedures, or compliance timelines present"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — essentially a safety notice issued by Australia's Civil Aviation Safety Authority (CASA) telling aircraft owners and operators what they must do to keep their planes airworthy.\n\n**What it does:** This particular directive (AD/PA-31/84) has been **cancelled**. It originally required inspections and modifications to the elevator structure (the part of the tail that controls up-and-down movement) on Piper PA-31 series aircraft.\n\n**Who it affects:** Owners and operators of Piper PA-31 aeroplanes — these are twin-engine planes commonly used for charter flights, air ambulance work, and freight.\n\n**Why it matters:** Even though this specific directive is cancelled, the safety issue it addressed hasn't been ignored. The work is now covered by a newer directive: **AD/PA-31/129**. This is common in aviation safety — older directives get replaced by updated ones that might have better inspection methods, different timeframes, or clearer instructions. Aircraft operators need to follow the current directive, not this cancelled one.\n\n**Key takeaway:** If you own or operate a Piper PA-31, don't use this document — check AD/PA-31/129 instead for the current elevator inspection requirements."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":true,"description":"The scope of AD/PA-31/84 has changed from imposing an active inspection/modification requirement to being cancelled (\"Requirement: CANCELLED\"). The document explicitly transfers the substantive requirement to AD/PA-31/129 (\"Background: The requirement of this Directive is addressed by AD/PA-31/129\"), so the legal obligation that would have applied under AD/PA-31/84 now falls under the later directive."},"complexity_factors":["Document is a short cancellation notice with minimal text.","Requirement fully cancelled and cross-referenced to a single successor directive (AD/PA-31/129).","No technical requirements, compliance procedures, or timelines are set out in this text.","Regulatory context (airworthiness directives under Civil Aviation Regulations) is standard but requires familiarity to follow the cross-reference.","Operational implications depend entirely on content of the successor directive, which is not included here."],"plain_english_summary":"This entry cancels airworthiness directive AD/PA-31/84 (Elevator Structure - Inspection and Modification) for Piper PA‑31 series aeroplanes. Aircraft owners, operators and maintenance organisations previously subject to AD/PA‑31/84 are affected.\n\nThe notice removes the AD/PA‑31/84 compliance obligation and directs operators to AD/PA‑31/129, which now addresses the same requirement."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-31-84-elevator-structure-inspection-and-modification","history":"/api/acts/ad-pa-31-84-elevator-structure-inspection-and-modification/history","analysis":"/api/acts/ad-pa-31-84-elevator-structure-inspection-and-modification/analysis","conflicts":"/api/acts/ad-pa-31-84-elevator-structure-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-pa-31-84-elevator-structure-inspection-and-modification/important-cases","documents":"/api/acts/ad-pa-31-84-elevator-structure-inspection-and-modification/documents"}}