{"id":"F2006B08038","name":"Airworthiness Directives 2004 - Revocation and Remaking - Thielert Piston Engines","slug":"airworthiness-directives-2004-revocation-and-remaking-thielert-piston-engines","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115112,"registerId":"commonwealth-F2006B08038-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 - Thielert Piston Engines","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 Thielert Piston Engines\n\n AD Name AD Number\n\n Engine Failure Due to Electrical System Failure AD/THIELERT/1\n\n Detachment of HP Fuel Pump Mounting Bolts AD/THIELERT/2\n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"This instrument revokes and re-makes the listed Airworthiness Directives but expressly reissues them \"in exactly the same form\" as the latest published editions (Note). Therefore the instrument does not change the substantive scope or wording of the Directives listed in Schedule 1; it changes only the legal form in which those Directives are issued."},"complexity_factors":["Short, narrowly focused instrument with limited operative steps (revocation and re-issuance).","References an external regulation for authority (subregulation 39.001(1)), requiring basic statutory cross-check.","Relies on attached Airworthiness Directives for substantive content, so users must consult additional documents to see obligations.","Administrative/formatting change only; minimal legal drafting complexity in this text itself."],"plain_english_summary":"This instrument, signed by a CASA delegate under subregulation 39.001(1), revokes two Thielert engine Airworthiness Directives (AD/THIELERT/1 and AD/THIELERT/2) and re‑makes them as separate statutory instruments. The re‑made Directives are stated to be identical to their latest published editions, so this is an administrative re‑issuance that does not change substantive obligations, only the legal form."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a straightforward administrative remaking of existing safety directives. The note explicitly confirms each directive is being re-made \"in exactly the same form\" as previously published. No expansion of scope or substance."},"complexity_factors":["Very short instrument (under 300 words)","Only 2 substantive items in Schedule 1","No defined terms section — relies on external definitions in CASR 1998","Simple binary structure: revoke old, make new","No conditional logic or nested exceptions","Cross-reference only to subregulation 39.001(1) and the attached schedules","Note explicitly states content is unchanged — no substantive interpretation required"],"plain_english_summary":"This is a formal decision by a CASA (Civil Aviation Safety Authority) delegate named David Villiers to update aviation safety rules for Thielert piston engines.\n\n**What it does:**\n- **Revokes** (cancels) two existing Airworthiness Directives (ADs) — these are mandatory safety instructions for aircraft maintenance\n- **Remakes** those same two directives as new, separate legal instruments\n\n**The two safety issues being addressed:**\n1. **AD/THIELERT/1** — Engine failures caused by electrical system problems\n2. **AD/THIELERT/2** — High-pressure fuel pump bolts coming loose (which could cause fuel leaks or engine failure)\n\n**Who it affects:**\n- Owners and operators of aircraft with Thielert piston engines\n- Aircraft maintenance engineers and organisations\n- Anyone responsible for keeping these engines airworthy\n\n**Why it matters:**\nAirworthiness Directives are legally binding safety orders. If you don't comply, you can't fly the aircraft. This instrument is essentially doing administrative housekeeping — updating the legal form of these safety rules without changing their actual content (as noted: \"re-made in exactly the same form\"). This ensures the directives remain legally valid and enforceable under current regulations."}},"importantCases":[],"_links":{"self":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-thielert-piston-engines","history":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-thielert-piston-engines/history","analysis":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-thielert-piston-engines/analysis","conflicts":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-thielert-piston-engines/conflicts","importantCases":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-thielert-piston-engines/important-cases","documents":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-thielert-piston-engines/documents"}}