{"id":"F2006B06209","name":"AD/PHZL/34 - SUPERSEDED","slug":"ad-phzl-34-superseded","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47096,"registerId":"commonwealth-F2006B06209-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PHZL/34 - SUPERSEDED","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET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 - 107 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Propellers - Variable Pitch - Hartzell\n\n \n\nAD/PHZL/34 SUPERSEDED 4/73\n\nSUPERSEDED by AD/PHZL/14 Amdt 3.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n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":"Not applicable — this is a historical archival record of a cancelled instrument with no current operative scope."},"complexity_factors":["Document is a single-page cancellation notice with no operative provisions","No defined terms, cross-references, or conditional logic","Contains only bibliographic information and a supersession statement","No substantive regulatory content — purely administrative/archival"],"plain_english_summary":"This document is a **superseded Airworthiness Directive** (AD) issued by the Civil Aviation Safety Authority (CASA). \n\n**What it is:** An Airworthiness Directive is a mandatory safety notice that requires aircraft owners or operators to perform specific inspections, repairs, or modifications to keep their aircraft safe to fly.\n\n**What this specific document does:** This particular directive (AD/PHZL/34) related to **Hartzell variable-pitch propellers** — these are aircraft propellers that can change their blade angle to adjust thrust during flight. The directive originally issued in April 1973 (hence \"4/73\") has been **cancelled and replaced** by a newer version.\n\n**Key point:** The document explicitly states it is **\"SUPERSEDED by AD/PHZL/14 Amdt 3\"** — meaning aircraft operators should no longer follow this directive. Instead, they must comply with the replacement directive AD/PHZL/14 Amendment 3.\n\n**Who it affects:** Owners and operators of aircraft fitted with Hartzell variable-pitch propellers who may have historical records referencing this directive.\n\n**Why it matters:** While the directive itself is no longer active, it remains in the historical record to show the regulatory lineage of safety requirements. Operators need to know this version is obsolete to ensure they follow current safety standards."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":true,"description":"The supplied entry explicitly states that AD/PHZL/34 is superseded (notation: \"SUPERSEDED 4/73\") and records that it was superseded by \"AD/PHZL/14 Amdt 3.\" From the supplied text alone, the scope of AD/PHZL/34 has therefore been replaced by the later instrument; the supplied excerpt does not provide the content of either the original or the superseding directive, so the nature or extent of the change in substantive scope cannot be determined from this document alone."},"complexity_factors":["Minimal content in supplied text — the entry consists only of an identifier, subject line, date notation and a supersession note.","Cross-reference / supersession — the instrument refers to another instrument (AD/PHZL/14 Amdt 3), requiring consultation of additional documents to understand operative effect.","Technical subject matter implied (propellers, variable pitch, Hartzell) — while the supplied text lacks technical detail, the topic itself is technical and would typically require specialist interpretation.","Regulatory context present but not elaborated — header locates the entry within Part 39/ schedule of airworthiness directives, creating procedural dependencies not set out here.","Historical notation (4/73) — dating indicates a historical instrument, which may require searching archival records for full content."],"plain_english_summary":"This entry is an index record in CASA’s Schedule of Airworthiness Directives identifying AD/PHZL/34 for Hartzell variable‑pitch propellers and noting it was superseded (4/73) by AD/PHZL/14 Amendment 3. The excerpt contains no operative requirements, costs, or enforcement details; to learn actual duties or obligations one must consult the original AD/PHZL/34 and the full superseding instrument."}},"importantCases":[],"_links":{"self":"/api/acts/ad-phzl-34-superseded","history":"/api/acts/ad-phzl-34-superseded/history","analysis":"/api/acts/ad-phzl-34-superseded/analysis","conflicts":"/api/acts/ad-phzl-34-superseded/conflicts","importantCases":"/api/acts/ad-phzl-34-superseded/important-cases","documents":"/api/acts/ad-phzl-34-superseded/documents"}}