{"id":"F2006B07816","name":"Airworthiness Directives 2004 - Revocation and Remaking - Chrislea CH-3 Series Aeroplanes","slug":"airworthiness-directives-2004-revocation-and-remaking-chrislea-ch-3-series-aeroplanes","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":50694,"registerId":"commonwealth-F2006B07816-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"Airworthiness Directives 2004 - Revocation and Remaking - Chrislea CH-3 Series Aeroplanes","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 Chrislea CH-3 Series Aeroplanes\n\n AD Name AD Number\n\n Engine Mount - Inspection AD/CH-3/1 Amdt 1\n\n Aileron Mass Balance - Inspection AD/CH-3/2 Amdt 1\n\n Front Seat Restraint Installation - Modification AD/CH-3/3\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The legislation maintains its original narrow scope. It deals exclusively with administrative reconstitution of three specific airworthiness directives for one aircraft type. The 'revoke and remake' mechanism preserves the substantive safety requirements exactly as they were; there is no expansion into new aircraft types, new safety issues, or new regulatory territory."},"complexity_factors":["Very short instrument (under 300 words)","Only 3 defined items (the specific Airworthiness Directives listed in Schedule 1)","No nested conditional logic or cross-references to other legislation beyond the enabling regulation (subregulation 39.001(1))","Straightforward binary structure: (a) revoke, (b) remake","Single Schedule with simple tabular format","No exceptions, exemptions, or transitional provisions"],"plain_english_summary":"This is a technical aviation safety instrument that **revokes and immediately remakes three specific airworthiness directives** for a particular type of vintage British aircraft—the Chrislea CH-3 series aeroplanes.\n\n**What it does:**\n- **Revokes** three existing safety directives (AD/CH-3/1 Amdt 1, AD/CH-3/2 Amdt 1, and AD/CH-3/3)\n- **Remakes them as separate, standalone legal instruments** in exactly the same form as they previously existed\n\n**Why this matters:**\nAirworthiness Directives (ADs) are mandatory safety instructions issued by the Civil Aviation Safety Authority (CASA). They require aircraft owners and operators to perform specific inspections, modifications, or maintenance to address unsafe conditions. This \"revoke and remake\" process is a housekeeping exercise that ensures each directive exists as its own legal instrument rather than being bundled together—making them easier to find, reference, and enforce.\n\n**Who it affects:**\n- Owners and operators of Chrislea CH-3 series aeroplanes (a rare 1950s British light aircraft)\n- Licensed aircraft maintenance engineers working on these aircraft\n- CASA itself, for enforcement and record-keeping purposes\n\n**The three safety requirements being preserved:**\n1. **Engine mount inspection** – checking the structure that holds the engine to the airframe\n2. **Aileron mass balance inspection** – checking weights that prevent dangerous vibrations in the wing control surfaces\n3. **Front seat restraint modification** – upgrading the seatbelts/harnesses for front-seat occupants\n\nThis is purely administrative—no new safety requirements are introduced, and no existing requirements are removed."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument does not change the substantive scope of the listed Airworthiness Directives. It revokes the listed ADs and re-makes them as separate instruments, and it states explicitly that each re-made AD is identical to the latest published edition (see Note). Therefore the regulatory obligations set out in those ADs, as published, remain in effect and are not altered by this instrument."},"complexity_factors":["Short, single-purpose instrument (revocation and re-making of listed ADs).","Clear statutory authority cited (subregulation 39.001(1)).","No substantive change to AD content (Note: re-made in exactly same form), reducing legal interpretation tasks.","Cross-reference to separate, attached AD instruments for substantive rules (requires checking those documents for full effect).","Limited number of listed items (three ADs) so scope is narrow."],"plain_english_summary":"This instrument records a CASA delegate revoking and re‑making three Airworthiness Directives for Chrislea CH‑3 series aeroplanes (engine mount, aileron mass balance, front‑seat restraint). Each AD is reissued in exactly the same form as the latest published edition, so it’s an administrative re‑publication rather than a substantive change. Affected parties are owners/operators bound by those ADs."}},"importantCases":[],"_links":{"self":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-chrislea-ch-3-series-aeroplanes","history":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-chrislea-ch-3-series-aeroplanes/history","analysis":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-chrislea-ch-3-series-aeroplanes/analysis","conflicts":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-chrislea-ch-3-series-aeroplanes/conflicts","importantCases":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-chrislea-ch-3-series-aeroplanes/important-cases","documents":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-chrislea-ch-3-series-aeroplanes/documents"}}