{"id":"F2006B11158","name":"AD/LEARJET/6 - Wing Flap System - Inspection","slug":"ad-learjet-6-wing-flap-system-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56852,"registerId":"commonwealth-F2006B11158-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/LEARJET/6 - Wing Flap System - 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/6 Wing Flap System - Inspection 8/74\n\nApplicability: All models: 24 with S/Nos. 24-100 to 24-296. 25 with S/Nos. 25-003 to 25-175. Document:               Gates Learjet SB No. 23/24/25-257.\n\nCompliance: Within 25 hours time in service after 27 August 1974.\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\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 focused specifically on wing flap system inspections for defined aircraft models. It has not expanded beyond its original safety purpose."},"complexity_factors":["Very short document (approximately 150 words)","Only 3 defined elements: applicability (specific serial numbers), reference document (Service Bulletin), and compliance deadline","No cross-references to other legislation or regulations beyond the parent Civil Aviation Regulations 1998","Single, unambiguous compliance requirement with clear time limit","No conditional logic, exceptions, or nested provisions","Straightforward applicability criteria based on aircraft model and serial number"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** issued by Australia's Civil Aviation Safety Authority (CASA) that mandates a safety inspection of the wing flap system on specific Gates Learjet aircraft models.\n\n**What it does:**\n- Requires owners/operators of certain Learjet 24 and 25 series aircraft to inspect their wing flap systems\n- The inspection must follow the procedures outlined in Gates Learjet Service Bulletin No. 23/24/25-257\n\n**Who it affects:**\n- Owners and operators of:\n  - Learjet 24 models with serial numbers 24-100 through 24-296\n  - Learjet 25 models with serial numbers 25-003 through 25-175\n\n**When compliance is required:**\n- Within 25 hours of flight time after 27 August 1974\n\n**Why it matters:**\nAirworthiness Directives are legally binding safety orders. They are issued when aviation authorities identify unsafe conditions in aircraft, engines, or equipment. Failing to comply means the aircraft cannot legally fly in Australian airspace. This particular directive addresses potential defects in the wing flap system—a critical flight control surface that affects lift and landing performance."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The AD as provided sets a single, well-defined obligation: inspect the wing flap system on specified Learjet 24 and 25 serial-number ranges within 25 hours time in service after 27 August 1974, following Gates Learjet SB No. 23/24/25-257 (Applicability; Compliance; Document). The supplied text contains no indication that the instrument's scope has been altered from its stated requirement."},"complexity_factors":["Narrow and specific applicability by model and serial numbers (Applicability)","Single, short-term compliance action with a fixed hours deadline (Compliance)","Technical procedure delegated to an external service bulletin rather than reproduced in the AD (Document)","Lack of specified corrective actions or cost allocation in the AD text (Document)","Regulatory authority referenced (Part 39), which implies mandatory status but does not detail enforcement in the provided text (header)"],"plain_english_summary":"This Airworthiness Directive requires owners/operators of specified Gates Learjet 24 (s/n 24-100 to 24-296) and Learjet 25 (s/n 25-003 to 25-175) to carry out the wing flap system inspection in Gates Learjet Service Bulletin No. 23/24/25‑257 within 25 hours time‑in‑service after 27 August 1974.\n\nIt creates a mandatory, short‑window compliance obligation and shifts technical detail and potential repair costs to operators, who must obtain and follow the referenced service bulletin."}},"importantCases":[],"_links":{"self":"/api/acts/ad-learjet-6-wing-flap-system-inspection","history":"/api/acts/ad-learjet-6-wing-flap-system-inspection/history","analysis":"/api/acts/ad-learjet-6-wing-flap-system-inspection/analysis","conflicts":"/api/acts/ad-learjet-6-wing-flap-system-inspection/conflicts","importantCases":"/api/acts/ad-learjet-6-wing-flap-system-inspection/important-cases","documents":"/api/acts/ad-learjet-6-wing-flap-system-inspection/documents"}}