{"id":"F2006B11152","name":"AD/LEARJET/34 - Flap Attachment Fittings","slug":"ad-learjet-34-flap-attachment-fittings","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56842,"registerId":"commonwealth-F2006B11152-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/LEARJET/34 - Flap Attachment Fittings","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/34 Flap Attachment Fittings 9/86\n\nApplicability: All model Learjet 24 & 25 with Serial Numbers. 24-328 to 24-357, 25-135, 25-188\n\nand 25-205 to 25-367.\n\n \n\nRequirement: Inspect in accordance with Gates Learjet S.B. 24/25-333. Compliance:  Within 200 hours time in service after 30 September 1986.\n\nBackground: Cracking of the flap attachment fitting has become evident in service. Failure of a flap attach fitting may result in an asymmetric flap condition.\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":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument applies to a defined set of Learjet 24 and 25 serial numbers and imposes a specified inspection requirement with a fixed compliance deadline. These elements are consistent with the instrument’s stated purpose (to address observed cracking of the flap attachment fitting) and do not broaden the scope beyond addressing that identified defect. (Applicability; Requirement; Compliance; Background)"},"complexity_factors":["Narrow applicability limited to specific serial numbers (Applicability)","Single prescriptive action: inspect per Gates Learjet S.B. 24/25-333 (Requirement)","Clear, short compliance window measured in flight hours after a specified date (Compliance)","Dependence on an external document (manufacturer service bulletin) for inspection procedure (Requirement)","No additional corrective-action steps detailed in this text if cracking is found, requiring reliance on the service bulletin or separate approvals (Requirement; Background)"],"plain_english_summary":"This AD mandates a one‑time inspection of flap‑attachment fittings on specified Gates Learjet 24/25 aircraft, to be done per Gates Learjet Service Bulletin 24/25‑333 within 200 flight hours after 30 Sept 1986. It targets owners/operators of the listed serial‑numbered aeroplanes.\n\nIt responds to in‑service cracking that could cause asymmetric flap failure; operators pay inspection/repair costs and must schedule the work to comply."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific mechanical defect in specific aircraft. It has not expanded beyond its original purpose of mandating inspections for cracked flap fittings on the identified Learjet models."},"complexity_factors":["Very short document (approximately 150 words of substantive content)","Only 3 defined elements: applicability (specific serial numbers), requirement (reference to external service bulletin), and compliance deadline","No cross-references to other legislation or regulations beyond the generic 'Civil Aviation Regulations 1998, Part 39' header","Single, unambiguous mandatory action with clear scope and deadline","No conditional logic, exceptions, or nested provisions","Straightforward cause-and-effect safety rationale"],"plain_english_summary":"**What this is:** 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 requires:** Owners and operators of certain Gates Learjet 24 and 25 series aircraft must inspect the **flap attachment fittings** (the metal brackets that connect the wing flaps to the aircraft structure) following a specific service bulletin from the manufacturer.\n\n**Who it affects:** Only specific serial numbers of Learjet 24 and 25 aircraft — specifically serial numbers 24-328 through 24-357, plus 25-135, 25-188, and 25-205 through 25-367.\n\n**Why it matters:** Cracks have been found in these fittings during normal use. If a flap attachment fitting breaks, it can cause **asymmetric flaps** — meaning one wing's flaps extend or retract differently than the other. This creates dangerous uneven lift and can cause the aircraft to roll unexpectedly, potentially leading to loss of control.\n\n**The deadline:** The inspection must be completed within 200 flight hours after 30 September 1986.\n\n**In short:** If you own one of these specific Learjets, you must check these brackets for cracks by a specific deadline to prevent a potentially catastrophic mechanical failure."}},"importantCases":[],"_links":{"self":"/api/acts/ad-learjet-34-flap-attachment-fittings","history":"/api/acts/ad-learjet-34-flap-attachment-fittings/history","analysis":"/api/acts/ad-learjet-34-flap-attachment-fittings/analysis","conflicts":"/api/acts/ad-learjet-34-flap-attachment-fittings/conflicts","importantCases":"/api/acts/ad-learjet-34-flap-attachment-fittings/important-cases","documents":"/api/acts/ad-learjet-34-flap-attachment-fittings/documents"}}