{"id":"F2006B07942","name":"Airworthiness Directives 2004 - Revocation and Remaking - Percival Vega Gull Series Aeroplanes","slug":"airworthiness-directives-2004-revocation-and-remaking-percival-vega-gull-series-aeroplanes","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":51010,"registerId":"commonwealth-F2006B07942-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 - Percival Vega Gull Series Aeroplanes","content":"Airworthiness Directives 2004\n\nI, DAVID ALAN VILLIERS, delegate of the Civil Aviation Safety\n\nAuthority, acting under subregulation 39.001 (1) of the Civil\n\nAviation Safety Regulations 1998:\n\n(a) revoke the Airworthiness Directives mentioned in\n\nSchedule 1; and\n\n(b) make, as separate instruments, each Airworthiness\n\nDirective mentioned in Schedule 1 and attached.\n\n![](image.001.png)\n\nDavid Villiers\n\nDelegate of the Civil Aviation Safety Authority\n\n20 December 2004\n\nNote: Each attached Airworthiness Directive is being re-made in exactly the\n\nsame form as appears in the latest published edition of the Directive.\n\n  \nSchedule 1 Revocation and Remaking of\n\nAirworthiness Directives\n\nPercival Vega Gull Series Aeroplanes\n\nAD Name AD Number\n\nWing Rib to Aileron Spar Joint - Inspection AD/GULL/1 Amdt 1\n\nRear Fuselage Drain Holes AD/GULL/2\n\nFront Seat Restraint Installations - Modification AD/GULL/3\n\nAirframe Structure - Inspection AD/GULL/4","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The document explicitly states that each Airworthiness Directive is being re-made \"in exactly the same form as appears in the latest published edition.\" This is a pure administrative remaking with no expansion of scope or substance."},"complexity_factors":["Very short document (under 300 words)","Only 4 substantive items in a simple table format","No defined terms section","No cross-references to other legislation beyond a single regulation citation (subregulation 39.001(1))","Straightforward administrative action with no conditional logic or exceptions","Single operative clause with two clear sub-paragraphs (a) and (b)"],"plain_english_summary":"This document is an official order from the Civil Aviation Safety Authority (CASA) that **revokes and reissues four specific safety rules** for a particular type of vintage aircraft called the **Percival Vega Gull**.\n\n**What it does:**\n- **Cancels** four existing Airworthiness Directives (ADs) — these are mandatory safety instructions that aircraft owners must follow to keep their planes airworthy (legal to fly).\n- **Reissues** those same four directives as brand new, separate legal instruments.\n\n**The four safety rules cover:**\n- **AD/GULL/1 Amdt 1**: Inspecting the joint where the wing rib connects to the aileron spar (structural parts of the wing)\n- **AD/GULL/2**: Checking rear fuselage drain holes (small openings that let water escape from the tail section)\n- **AD/GULL/3**: Modifying front seat restraints (seatbelts/harnesses for the pilot and front passenger)\n- **AD/GULL/4**: General airframe structure inspection\n\n**Who it affects:**\n- Owners and operators of Percival Vega Gull series aeroplanes (a British-designed aircraft from the 1930s, now mostly in private or heritage collections)\n- Maintenance engineers who work on these aircraft\n\n**Why it matters:**\nThis is an **administrative housekeeping exercise**. CASA is not changing the actual safety requirements — the note explicitly states each directive is being \"re-made in exactly the same form.\" Instead, CASA is updating the legal status of these rules to ensure they sit correctly within Australia's aviation regulatory framework. This kind of revocation and remaking is common when regulations are being restructured or consolidated, ensuring older safety orders remain legally valid and enforceable."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument revokes and re-makes the listed Airworthiness Directives \"in exactly the same form as\" their latest published editions (Note). Because the text of the ADs is preserved, the instrument does not change the substantive scope or requirements of those ADs; it is an administrative re-issuance rather than a substantive scope change."},"complexity_factors":["Instrument performs a single administrative action (revoke and re-make) rather than introducing new substantive provisions","Relies on an external regulatory power (subregulation 39.001(1)) to authorise the action","Effect depends on the content of separately attached ADs and the \"latest published edition\" referenced in the Note (cross-reference increases practical complexity for affected parties)","Multiple ADs are affected (four distinct ADs with different technical subjects), requiring operators to check each AD for specific obligations"],"plain_english_summary":"This instrument, signed by a CASA delegate, revokes four existing Airworthiness Directives for Percival Vega Gull series aeroplanes and re-issues each as a separate attached instrument. The attached ADs are reproduced unchanged from their latest published forms, so existing inspection, modification and compliance obligations for owners, holders and operators continue in the same terms."}},"importantCases":[],"_links":{"self":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-percival-vega-gull-series-aeroplanes","history":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-percival-vega-gull-series-aeroplanes/history","analysis":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-percival-vega-gull-series-aeroplanes/analysis","conflicts":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-percival-vega-gull-series-aeroplanes/conflicts","importantCases":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-percival-vega-gull-series-aeroplanes/important-cases","documents":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-percival-vega-gull-series-aeroplanes/documents"}}