{"id":"F2006B07994","name":"Airworthiness Directives 2004 - Revocation and Remaking - Propellers - Variable Pitch - MT","slug":"airworthiness-directives-2004-revocation-and-remaking-propellers-variable-pitch-mt","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115049,"registerId":"commonwealth-F2006B07994-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"Airworthiness Directives 2004 - Revocation and Remaking - Propellers - Variable Pitch - MT","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 20.2\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\n Airworthiness Directives 2004\n\n I, DAVID ALAN VILLIERS, delegate of the Civil Aviation Safety\n\n Authority, acting under subregulation 39.001 (1) of the Civil\n\n Aviation Safety Regulations 1998:\n\n (a) revoke the Airworthiness Directives mentioned in\n\n Schedule 1; and\n\n (b) make, as separate instruments, each Airworthiness\n\n Directive mentioned in Schedule 1 and attached.\n\n \n\n ![](image.001.png)\n\n David Villiers\n\n Delegate of the Civil Aviation Safety Authority\n\n \n\n  20 December 2004\n\n Note:   Each attached Airworthiness Directive is being re-made in exactly the\n\n same form as appears in the latest published edition of the Directive.\n\n \n\n\n Schedule 1 Revocation and Remaking of\n\n Airworthiness Directives\n\n Propellers - Variable Pitch - MT\n\n AD Name AD Number\n\n Blade Root Lag Screws AD/PMTV/1\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument explicitly states it is remaking the directive in exactly the same form. There is no expansion of scope; this is purely administrative re-enactment."},"complexity_factors":["Very short instrument (under 300 words)","Only one substantive action (revocation and remaking of a single directive)","No defined terms section","No conditional logic or nested exceptions","Single cross-reference to Civil Aviation Safety Regulations 1998 subregulation 39.001(1) (the empowering provision)","Content largely contained in a schedule table with only one entry"],"plain_english_summary":"This is a technical aviation safety instrument issued by the Civil Aviation Safety Authority (CASA) in December 2004. It does two things:\n\n- **Revokes** (cancels) an existing Airworthiness Directive numbered AD/PMTV/1 concerning \"Blade Root Lag Screws\" on MT variable pitch propellers\n- **Remakes** that same directive as a new, separate legal instrument\n\n**What is an Airworthiness Directive?**  \nThink of it as a mandatory safety recall or maintenance bulletin for aircraft. When CASA discovers a defect, design flaw, or unsafe condition in an aircraft part, they issue an Airworthiness Directive requiring owners or operators to inspect, repair, or replace that part. Compliance is legally compulsory.\n\n**Why remake it?**  \nThe note explains that the directive is being re-issued in exactly the same form as before. This is likely an administrative housekeeping exercise—perhaps to consolidate instruments, fix a technical legal defect in the original, or transition to a new regulatory framework under the Civil Aviation Safety Regulations 1998.\n\n**Who does this affect?**  \nOwners and operators of aircraft fitted with MT-Propeller Entwicklung GmbH (MT) variable pitch propellers, specifically those affected by the blade root lag screw issue. Maintenance organisations and certifying engineers who work on these propellers must also comply.\n\n**Why it matters**  \nBlade root lag screws are critical fasteners holding propeller blades to the hub. If they fail, the blade could detach in flight with catastrophic consequences. This directive ensures the safety requirement remains legally enforceable."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument does not change the substantive content or scope of the Airworthiness Directive listed in Schedule 1. It revokes the prior instrument(s) and re-issues the same directive(s) as separate instruments in identical form (see paragraphs (a), (b) and the Note). Therefore, the substantive obligations and affected parties remain those set out in the latest published edition of the directive; this instrument alters only the form/identity of the instrument, not its stated content."},"complexity_factors":["Administrative nature: the instrument revokes and re-issues existing directives without changing their stated form (Note).","Clear legal authority: action taken under a single cited provision, subregulation 39.001(1).","Limited scope: Schedule 1 lists a single named AD (AD/PMTV/1) so the instrument's immediate reach is narrow.","Dependence on attachments: substantive obligations are not in this text but in the attached AD(s), requiring consultation of additional documents to assess operational impact.","Low technical detail in instrument: no technical or procedural rules are added or changed in this text."],"plain_english_summary":"This instrument revokes the listed Airworthiness Directive (AD/PMTV/1 — MT variable-pitch propellers, \"Blade Root Lag Screws\") and re-issues it as a separate legal instrument in exactly the same form. It therefore targets operators, owners and maintainers of aircraft fitted with the specified MT propeller.\n\nPractically, the move is administrative: it changes instrument identity and creates minor record‑keeping work for regulators and operators but does not alter substantive obligations, costs, or technical requirements."}},"importantCases":[],"_links":{"self":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-propellers-variable-pitch-mt","history":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-propellers-variable-pitch-mt/history","analysis":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-propellers-variable-pitch-mt/analysis","conflicts":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-propellers-variable-pitch-mt/conflicts","importantCases":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-propellers-variable-pitch-mt/important-cases","documents":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-propellers-variable-pitch-mt/documents"}}