{"id":"F2006B06194","name":"AD/PHS/2 Amdt 1 - Model 23260, 43E-60 and 43D-50 Reverse Solenoid Valve - Modification","slug":"ad-phs-2-amdt-1-model-23260-43e-60-and-43d-50-reverse-solenoid-valve-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47062,"registerId":"commonwealth-F2006B06194-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PHS/2 Amdt 1 - Model 23260, 43E-60 and 43D-50 Reverse Solenoid Valve - 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 - 107 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Propellers - Variable Pitch - Hamilton Standard\n\n \n\nAD/PHS/2\n\nAmdt 1\n\n\nModel 23260, 43E-60 and 43D-50 Reverse Solenoid Valve - Modification\n\n\n6/66\n\n \n\nApplicability: All model 23260, 43E60 and 43D50 propellers.\n\n \n\nRequirement: Remove Hamilton Standard Model 67000 reverse solenoid valves and replace with approved, redesigned valves.\n\n \n\nCompliance: Before installation in an aircraft after 28 July 1968.\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 narrow, technical safety directive focused on a specific mechanical component. It has not expanded beyond its original purpose of mandating a hardware replacement for safety reasons."},"complexity_factors":["Extremely short document (under 200 words)","No defined terms section","No cross-references to other legislation","Simple unconditional requirement: remove old part, install new part","Single compliance date with no exceptions or alternative methods","Plain language applicability and requirement sections"],"plain_english_summary":"This is an **Airworthiness Directive** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It requires owners and operators of specific Hamilton Standard aircraft propellers to replace a faulty reverse solenoid valve (a component that controls the propeller's pitch in reverse thrust) with a redesigned, approved version.\n\n**Who it affects:** Anyone operating aircraft with Hamilton Standard Model 23260, 43E-60, or 43D-50 propellers.\n\n**What you must do:** Remove the old Model 67000 reverse solenoid valve and install an approved replacement before putting the propeller into service after 28 July 1968.\n\n**Why it matters:** The original valves were apparently defective or unsafe. This directive prevents potential propeller control failures, which could cause accidents during landing or ground operations when reverse thrust is needed."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"The instrument is labelled \"Amdt 1\" to AD/PHS/2, indicating this is an amendment. The supplied text sets the current scope: it applies to all Model 23260, 43E60 and 43D50 propellers and mandates removal of Hamilton Standard Model 67000 reverse solenoid valves and replacement with an \"approved, redesigned\" valve before installation after 28 July 1968 (Applicability; Requirement; Compliance). Because the original AD text is not included, the precise nature or extent of the change from the original cannot be determined from the supplied document alone; the label and present wording establish that at least one change was made and that the current obligation is as described above."},"complexity_factors":["Narrow technical scope: applies to a clearly defined set of propeller models (Applicability).","Clear mandatory action: specific part removal and replacement is stated (Requirement).","Fixed compliance trigger/date: replacement must be done before installation after 28 July 1968 (Compliance).","Approval requirement: replacement must be an \"approved, redesigned\" valve, which implies an approval process not specified in the text (Requirement).","Operational logistics: sourcing approved parts and scheduling installation create practical burdens for owners/operators (Requirement; Compliance).","Enforcement and documentation not detailed: the directive does not describe how compliance is to be evidenced or approved, leaving procedural discretion to the authority (Compliance).","Document is an amendment (Amdt 1) but the original text is not supplied, so comparative scope changes are not directly shown (header)."],"plain_english_summary":"This amendment mandates removal of Hamilton Standard Model 67000 reverse solenoid valves from all propeller models 23260, 43E‑60 and 43D‑50 and installation of an \"approved, redesigned\" valve before any listed propeller is fitted to an aircraft after 28 July 1968. Owners, operators and maintenance organisations must carry out and pay for the work; the approval requirement adds an administrative conformity step and may cause parts, timing and cost impacts."}},"importantCases":[],"_links":{"self":"/api/acts/ad-phs-2-amdt-1-model-23260-43e-60-and-43d-50-reverse-solenoid-valve-modification","history":"/api/acts/ad-phs-2-amdt-1-model-23260-43e-60-and-43d-50-reverse-solenoid-valve-modification/history","analysis":"/api/acts/ad-phs-2-amdt-1-model-23260-43e-60-and-43d-50-reverse-solenoid-valve-modification/analysis","conflicts":"/api/acts/ad-phs-2-amdt-1-model-23260-43e-60-and-43d-50-reverse-solenoid-valve-modification/conflicts","importantCases":"/api/acts/ad-phs-2-amdt-1-model-23260-43e-60-and-43d-50-reverse-solenoid-valve-modification/important-cases","documents":"/api/acts/ad-phs-2-amdt-1-model-23260-43e-60-and-43d-50-reverse-solenoid-valve-modification/documents"}}