{"id":"F2006B11098","name":"AD/LEARJET 35/2 - Spoiler Centre Hinge Brackets - Inspection","slug":"ad-learjet-35-2-spoiler-centre-hinge-brackets-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56758,"registerId":"commonwealth-F2006B11098-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/LEARJET 35/2 - Spoiler Centre Hinge Brackets - 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)  Gates Learjet 35 and 36 Series Aeroplanes\n\n \n\nAD/LEARJET 35/2 Spoiler Centre Hinge Brackets - Inspection 4/76\n\nApplicability: All Models: 35 with S/Nos. 35-001 to 35-019;\n\n \n\n36 with S/Nos. 36-001 to 36-008.\n\n \n\nDocument: Gates Learjet SB 35/36-27-2.\n\n \n\nCompliance: Before exceeding 300 hours total time in service, or before 30 May 1976 whichever occurs first.\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, single-issue airworthiness directive from 1976 addressing a specific mechanical inspection requirement. It has not expanded beyond its original purpose of ensuring the airworthiness of early-model Learjet spoiler hinge brackets."},"complexity_factors":["Very short document (approximately 150 words of substantive content)","Only 4 defined elements: applicability (specific serial numbers), document reference, compliance deadline, and subject matter","No cross-references to other legislation or regulations beyond the parent Civil Aviation Regulations 1998","Simple conditional logic: single 'whichever occurs first' deadline calculation","No nested exceptions or subordinate provisions","Single-purpose instrument with no ancillary provisions (penalties, appeals, etc.)"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for specific aircraft.\n\n**What it does:**\n- Requires owners and operators of certain **Gates Learjet 35 and 36 series aircraft** to inspect the **spoiler centre hinge brackets** — these are structural components on the wings that help control the plane during landing and flight.\n\n**Who it affects:**\n- Only specific serial numbers: Learjet 35 models numbered 35-001 through 35-019, and Learjet 36 models numbered 36-001 through 36-008.\n\n**What must happen:**\n- The inspection must be completed **before the aircraft reaches 300 total flight hours**, or **before 30 May 1976** — whichever comes first.\n- The inspection must follow the procedure in **Gates Learjet Service Bulletin 35/36-27-2** (a technical document from the manufacturer).\n\n**Why it matters:**\nAirworthiness Directives are legally binding safety requirements. If you don't comply, you cannot legally fly the aircraft. This particular AD addresses potential structural defects in early-production Learjets that could affect flight safety."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument, as provided, sets a narrowly defined obligation: inspect the spoiler centre hinge brackets on specific Learjet 35 and 36 serial numbers by a defined hours-or-date deadline and follow Gates Learjet SB 35/36-27-2. There is no indication in the text supplied that the AD changes or broadens the set of affected aircraft or the required action from any previously stated intent; it is focused and time-limited as issued."},"complexity_factors":["Narrow applicability limited to specific serial numbers (reduces scope complexity). (Applicability)","Single prescribed action (inspection) rather than a multi-step regulatory regime (low procedural complexity). (Title/Document)","Short, fixed compliance deadline combining flight-hours and calendar date creates operational scheduling complexity for affected operators. (Compliance)","Reliance on an external service bulletin (Gates Learjet SB 35/36-27-2) for the technical procedure increases procedural dependency but not legal complexity. (Document)","Lack of detailed corrective-action text in the AD requires cross-reference to the SB, adding an extra step for implementers. (Document)"],"plain_english_summary":"This directive requires operators of certain serial-numbered Gates Learjet 35/36 aeroplanes to carry out an inspection of the spoiler centre hinge brackets using Gates Learjet Service Bulletin SB 35/36-27-2. The Civil Aviation Safety Authority mandates the check be completed before the aeroplane reaches 300 hours total time or by 30 May 1976, whichever comes first.\n\nPractically, affected owners must schedule and fund the inspection (and any follow-on work), potentially disrupting operations and relying on the manufacturer’s bulletin for procedure and corrective action."}},"importantCases":[],"_links":{"self":"/api/acts/ad-learjet-35-2-spoiler-centre-hinge-brackets-inspection","history":"/api/acts/ad-learjet-35-2-spoiler-centre-hinge-brackets-inspection/history","analysis":"/api/acts/ad-learjet-35-2-spoiler-centre-hinge-brackets-inspection/analysis","conflicts":"/api/acts/ad-learjet-35-2-spoiler-centre-hinge-brackets-inspection/conflicts","importantCases":"/api/acts/ad-learjet-35-2-spoiler-centre-hinge-brackets-inspection/important-cases","documents":"/api/acts/ad-learjet-35-2-spoiler-centre-hinge-brackets-inspection/documents"}}