{"id":"F2006B09302","name":"AD/DO-27/7 - Outboard Elevator Hinge Fitting - Inspection","slug":"ad-do-27-7-outboard-elevator-hinge-fitting-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":53393,"registerId":"commonwealth-F2006B09302-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DO-27/7 - Outboard Elevator Hinge Fitting - Inspection","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Dornier DO-27 Series Aeroplanes\n\n \n\n \n\n| AD/DO-27/7 | Outboard Elevator Hinge Fitting - Inspection | NK |\n| --- | --- | --- |\n| Applicability: | All models not fitted with Elevator Hinge P/N 27.302- 02H05 \"a\". |  |\n| Document: | Dornier TB No. 27-28B. |  |\n\n\n \n\nCompliance: Within 100 hours time in service from 15 April 1969 and thereafter at intervals not exceeding 100 hours time in service.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific airframe component on a specific aircraft type. It has not expanded beyond its original purpose of ensuring elevator hinge integrity through periodic inspection."},"complexity_factors":["Single, specific mechanical component addressed (outboard elevator hinge fitting)","Simple binary applicability test (whether specific part number is installed)","Straightforward compliance schedule (100 hours recurring)","No defined terms section","No cross-references to other legislation or regulations beyond the enabling authority (Civil Aviation Regulations 1998, Part 39)","Single source document referenced (Dornier Technical Bulletin No. 27-28B)","Extremely short length (approximately 150 words of substantive content)"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order — issued by Australia's Civil Aviation Safety Authority (CASA) for a specific type of aircraft: the **Dornier DO-27 series**.\n\n**What it does:**\nIt requires owners and operators of these planes to **inspect the outboard elevator hinge fitting** (a part of the tail that controls the plane's pitch) at regular intervals.\n\n**Who it affects:**\nAnyone who owns or operates a Dornier DO-27 aircraft that **doesn't** have a specific upgraded hinge part installed (Elevator Hinge Part Number 27.302-02H05 \"a\").\n\n**What must be done:**\n- **First inspection:** Within 100 hours of flying time after 15 April 1969\n- **Repeat inspections:** Every 100 hours of flying time thereafter\n\n**Why it matters:**\nThis directive was issued because the original hinge fitting was likely prone to wear, fatigue, or failure — which could cause the elevator (the moving part of the tail) to malfunction or detach. That would make the aircraft uncontrollable. The directive forces operators to catch problems before they cause accidents.\n\n**Key point:** This is **not optional**. Airworthiness Directives are legally binding. If you don't comply, you cannot legally fly the aircraft."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive, as shown, applies to all DO-27 models not fitted with the specified hinge part and requires inspections every 100 hours from the stated date. There is no information in the text provided that indicates a change from an earlier or original scope; the instrument sets a single, clearly defined applicability and compliance interval (Applicability; Compliance)."},"complexity_factors":["Narrow technical focus (single component: outboard elevator hinge fitting).","Clear applicability condition based on part number (P/N 27.302-02H05 \"a\").","Simple, fixed recurring inspection interval (every 100 hours).","Reference to an external technical bulletin (Dornier TB No. 27-28B) for inspection procedure increases dependence on that document but does not itself add procedural complexity to the directive.","Operational impacts (downtime, parts replacement) are straightforward but vary by operator choices and part availability.","No detailed corrective-action steps in the text provided, creating limited interpretive discretion for maintenance organisations."],"plain_english_summary":"This directive requires owners/operators of Dornier DO-27 aeroplanes not fitted with Elevator Hinge P/N 27.302-02H05 \"a\" to have the outboard elevator hinge fitting inspected per Dornier TB No. 27-28B within 100 hours TIS from 15 April 1969 and every 100 hours thereafter. It imposes recurring inspection costs, downtime and reliance on correct part identification and maintenance competence; operators may instead fit the specified part to avoid the repeated inspections."}},"importantCases":[],"_links":{"self":"/api/acts/ad-do-27-7-outboard-elevator-hinge-fitting-inspection","history":"/api/acts/ad-do-27-7-outboard-elevator-hinge-fitting-inspection/history","analysis":"/api/acts/ad-do-27-7-outboard-elevator-hinge-fitting-inspection/analysis","conflicts":"/api/acts/ad-do-27-7-outboard-elevator-hinge-fitting-inspection/conflicts","importantCases":"/api/acts/ad-do-27-7-outboard-elevator-hinge-fitting-inspection/important-cases","documents":"/api/acts/ad-do-27-7-outboard-elevator-hinge-fitting-inspection/documents"}}