{"id":"F2006B11126","name":"AD/LEARJET/10 - Spoiler Centre Hinge Brackets - Inspection","slug":"ad-learjet-10-spoiler-centre-hinge-brackets-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56802,"registerId":"commonwealth-F2006B11126-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/LEARJET/10 - 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 24 & 25 Series Aeroplanes\n\n \n\nAD/LEARJET/10 Spoiler Centre Hinge Brackets - Inspection 6/75\n\nApplicability: Model 24 with S/Nos. 24-100 to 24-301, -309, -310, -313 and -314. Model 25 with\n\nS/Nos. 25-002 to 25-185.\n\n \n\nDocument: Gates Learjet SB 23/24/25-262.\n\n \n\nCompliance: Within the next 100 hours time in service after 31 July 1975.\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, time-limited safety directive from 1975 addressing a specific mechanical inspection. It has not expanded beyond its original purpose of ensuring spoiler hinge bracket integrity on specific Learjet models."},"complexity_factors":["Very short document (approximately 150 words)","Only 2 defined applicability criteria (specific serial number ranges)","Single compliance requirement with clear deadline","No cross-references to other legislation beyond the enabling Civil Aviation Regulations 1998","No conditional logic or exceptions","Straightforward command structure: applies to X, do Y by Z date"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** issued by Australia's Civil Aviation Safety Authority (CASA). It mandates a safety inspection for specific Gates Learjet aircraft models.\n\n**What it does:**\n- Requires owners/operators of certain Learjet 24 and 25 series aircraft to inspect the **spoiler centre hinge brackets** (parts that help control the aircraft's lift and descent)\n- The inspection must follow the manufacturer's Service Bulletin (SB 23/24/25-262)\n\n**Who it affects:**\n- Owners and operators of specific Learjet aircraft with particular serial numbers:\n  - **Model 24:** Serial numbers 24-100 through 24-301, plus 24-309, 24-310, 24-313, and 24-314\n  - **Model 25:** Serial numbers 25-002 through 25-185\n\n**Why it matters:**\nAirworthiness Directives are legally binding safety orders. They typically issue when a safety defect or unsafe condition is discovered in an aircraft type. Non-compliance means the aircraft cannot legally fly in Australian airspace. This particular directive from 1975 addressed a potential structural issue with spoiler hinge brackets that could affect flight safety.\n\n**Compliance deadline:**\nThe inspection had to be completed within 100 hours of flight time after 31 July 1975."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The AD appears to set an initial, targeted inspection requirement for the specified Learjet 24 and 25 serial numbers and does not indicate any amendment or expansion of scope within the text provided. The instrument limits itself to inspection of the spoiler centre hinge brackets by directing compliance with Gates Learjet SB 23/24/25-262 (Applicability; Document; Compliance)."},"complexity_factors":["Narrow and explicit applicability limited to specified serial numbers (Applicability) — reduces complexity.","Single, clearly stated compliance window: \"within the next 100 hours time in service after 31 July 1975\" (Compliance) — straightforward timing requirement.","Compliance is defined by reference to an external manufacturer's service bulletin (Gates Learjet SB 23/24/25-262) rather than detailed steps in the AD itself (Document) — adds some procedural dependence on another document.","Absence of explicit corrective-action text in the AD — requires operators to consult the referenced service bulletin or approved procedures, creating potential ambiguity in implementation.","Authority and enforcement are by the Civil Aviation Safety Authority under the Schedule of Airworthiness Directives (header) — normal regulatory channel, low interpretive complexity but binding effect."],"plain_english_summary":"This AD mandates an inspection of the spoiler centre hinge brackets on specified Gates Learjet Model 24 and 25 serial numbers, requiring operators to follow Gates Learjet SB 23/24/25‑262. The inspection must be done within 100 flight hours after 31 July 1975. It applies only to the listed aircraft; owners/operators must obtain the service bulletin, bear inspection and any repair costs, and comply to meet airworthiness requirements."}},"importantCases":[],"_links":{"self":"/api/acts/ad-learjet-10-spoiler-centre-hinge-brackets-inspection","history":"/api/acts/ad-learjet-10-spoiler-centre-hinge-brackets-inspection/history","analysis":"/api/acts/ad-learjet-10-spoiler-centre-hinge-brackets-inspection/analysis","conflicts":"/api/acts/ad-learjet-10-spoiler-centre-hinge-brackets-inspection/conflicts","importantCases":"/api/acts/ad-learjet-10-spoiler-centre-hinge-brackets-inspection/important-cases","documents":"/api/acts/ad-learjet-10-spoiler-centre-hinge-brackets-inspection/documents"}}