{"id":"F2006B07831","name":"Airworthiness Directives 2004 - Revocation and Remaking - DH 87 (Hornet Moth) Series Aeroplanes","slug":"airworthiness-directives-2004-revocation-and-remaking-dh-87-hornet-moth-series-aeroplanes","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":50743,"registerId":"commonwealth-F2006B07831-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 - DH 87 (Hornet Moth) 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 DH 87 (Hornet Moth) Series Aeroplanes\n\n AD Name AD Number\n\n Seat Restraint Installations - Modification AD/DH 87/1\n\n Flight Limitations and Structural Inspection AD/DH 87/2 Amdt 1\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This instrument performs a narrow, technical administrative function. It does not expand the scope of the original Airworthiness Directives; it merely reissues them in the same form under updated legislative authority. The scope remains limited to the specific vintage aircraft model (DH 87 Hornet Moth) and the two specific safety matters originally addressed."},"complexity_factors":["Very short document (under 300 words)","Only 2 substantive items in Schedule 1","No defined terms section","No cross-references to other legislation beyond the enabling regulation (subregulation 39.001(1))","Simple binary structure: revoke old, make new","Explicit note confirming no substantive changes to the attached directives"],"plain_english_summary":"This is a technical aviation safety instrument issued by the Civil Aviation Safety Authority (CASA) in December 2004. It deals with two specific safety rules (called \"Airworthiness Directives\") that apply to a particular vintage aircraft model: the DH 87 Hornet Moth series aeroplanes.\n\n**What it does:**\n- **Revokes** (cancels) two existing Airworthiness Directives\n- **Remakes** those same two directives as new, separate legal instruments\n- The directives are being kept in exactly the same form as they were before — no changes to the actual safety requirements\n\n**The two safety rules affected:**\n1. **AD/DH 87/1** — Requires specific modifications to seat restraints (seatbelts/harnesses) in these aircraft\n2. **AD/DH 87/2 Amdt 1** — Sets flight limitations and requires structural inspections\n\n**Who it affects:**\n- Owners and operators of DH 87 Hornet Moth aircraft (a 1930s British biplane, now mostly in heritage/vintage aviation use)\n- Maintenance engineers working on these aircraft\n\n**Why it matters:**\nAirworthiness Directives are legally binding safety orders. They exist to address known safety risks in aircraft design or operation. This instrument is essentially an administrative \"housekeeping\" exercise — updating the legal form of these rules without changing their substance. This ensures the directives remain valid legal instruments under the Civil Aviation Safety Regulations 1998."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"This instrument does not change the substantive scope or content of the Airworthiness Directives listed in Schedule 1. It revokes the earlier ADs and re‑issues them as separate instruments in the same form as the latest published editions (opening paragraph (a) and (b); Note). The practical effect is administrative reissuance rather than substantive amendment."},"complexity_factors":["Cross-reference to an external regulation for authority: action taken under subregulation 39.001(1) (requires locating that provision to confirm power).","Attachment dependence: the operative content depends on attached ADs and the \"latest published edition\" referenced in the Note.","Technical subject matter: while this instrument is administrative, the underlying ADs (seat restraint modification; flight limitations and structural inspection) are technical and require domain expertise to implement.","Multiple instruments: revocation and separate re‑making of multiple ADs requires stakeholders to track several documents rather than a single consolidated item."],"plain_english_summary":"A CASA delegate has revoked certain Airworthiness Directives for DH 87 (Hornet Moth) aircraft and re‑issued them as separate, attached instruments in identical form. Owners, operators and maintainers remain subject to the same seat‑restraint modification, flight‑limitation and structural‑inspection requirements and attendant compliance costs. The change is administrative — it preserves existing obligations but requires stakeholders to rely on the newly issued attachments and verify they match the published directives."}},"importantCases":[],"_links":{"self":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-dh-87-hornet-moth-series-aeroplanes","history":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-dh-87-hornet-moth-series-aeroplanes/history","analysis":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-dh-87-hornet-moth-series-aeroplanes/analysis","conflicts":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-dh-87-hornet-moth-series-aeroplanes/conflicts","importantCases":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-dh-87-hornet-moth-series-aeroplanes/important-cases","documents":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-dh-87-hornet-moth-series-aeroplanes/documents"}}