{"id":"F2006B02760","name":"AD/B727/58 Amdt 1 - Main Landing Gear Actuator Beam Support Link - Inspection and Modification","slug":"ad-b727-58-amdt-1-main-landing-gear-actuator-beam-support-link-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42102,"registerId":"commonwealth-F2006B02760-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B727/58 Amdt 1 - Main Landing Gear Actuator Beam Support Link - Inspection and Modification","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)  Boeing 727 Series Aeroplanes\n\n \n\nAD/B727/58\n\nAmdt 1\n\n\nMain Landing Gear Actuator Beam Support Link - Inspection and Modification\n\n\n9/71\n\n \n\nApplicability: All models.\n\n \n\nRequirement: Inspect the main landing gear actuator beam support link P/N 65-19657-4, -5 or -8 in accordance with Boeing SB No. 32-90 Rev. 2 and link P/N 65-19657-13 in accordance with Boeing SB No. 32-189 until replaced by link P/N 65-19657-11.\n\n \n\nCompliance: Forthwith.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\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 narrow, technical airworthiness directive focused on a specific mechanical component of a specific aircraft type. It has not expanded beyond its original safety purpose. The amendment appears to update inspection procedures or part numbers but remains tightly scoped to the main landing gear actuator beam support link issue."},"complexity_factors":["Very short document (approximately 150 words)","Only 3 defined part numbers referenced","Simple binary applicability (all models)","Single compliance requirement with immediate effect","No nested conditions or exceptions","References only 2 external technical documents (Boeing Service Bulletins)","No cross-references to other legislation or regulations beyond the enabling authority (CAR 1998 Part 39)"],"plain_english_summary":"**What this is:** This is an Airworthiness Directive (AD) — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). Think of it as a \"recall notice\" for aircraft, but legally binding.\n\n**What it does:** It requires owners and operators of **Boeing 727 series aircraft** to inspect a specific part of the main landing gear — the \"actuator beam support link\" (a structural component that helps hold the landing gear in place). \n\n**The specific requirements:**\n- **For part numbers 65-19657-4, -5, or -8:** Inspect following Boeing Service Bulletin 32-90 (Revision 2)\n- **For part number 65-19657-13:** Inspect following Boeing Service Bulletin 32-189\n- **End goal:** Keep inspecting until the part is replaced with the improved part number 65-19657-11\n\n**Who it affects:** Anyone who owns, operates, or maintains Boeing 727 aircraft in Australia.\n\n**Why it matters:** Landing gear failures can be catastrophic. This directive addresses a known safety issue with specific support links that could fail if not inspected and eventually replaced. The \"forthwith\" compliance means do it immediately — no grace period.\n\n**Key context:** This is Amendment 1 (Amdt 1) of directive AD/B727/58, originally dating from September 1971 (9/71). It updates the inspection requirements for this aging aircraft type."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The text provided sets out mandatory inspection and replacement requirements applicable to all Boeing 727 models and specifies the service bulletins and part numbers to be used. The instrument itself does not state any change to the applicability or scope from a prior version within this excerpt; it imposes immediate inspection and replacement obligations as written (Applicability; Requirement; Compliance)."},"complexity_factors":["Technical specificity of part numbers (P/N 65-19657-4, -5, -8, -13 and replacement P/N 65-19657-11) requiring inventory checks and parts tracking (Requirement).","Dependence on external technical documents (Boeing SB No. 32-90 Rev. 2 and SB No. 32-189) for procedural detail; the AD does not itself set out inspection steps (Requirement).","Immediate compliance timing (“Forthwith”) increases operational urgency and reduces scheduling flexibility (Compliance).","Application to all models of the fleet increases the number of affected aircraft and heterogeneity of operator circumstances (Applicability).","Regulatory mandatory nature with limited scope for discretionary delay—operators must either inspect or replace as directed, or seek an approved alternative compliance method (Requirement; Compliance)."],"plain_english_summary":"This AD requires immediate (\"Forthwith\") inspection and, if needed, modification or replacement of certain main landing‑gear actuator beam support link parts on all Boeing 727 models, using the Boeing service bulletins named, until affected parts are replaced with P/N 65‑19657‑11. It binds operators/owners to the work (CASA mandates compliance), shifts inspection and replacement costs and downtime to operators, and leaves maintenance providers to schedule and perform the mandated actions."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b727-58-amdt-1-main-landing-gear-actuator-beam-support-link-inspection-and-modification","history":"/api/acts/ad-b727-58-amdt-1-main-landing-gear-actuator-beam-support-link-inspection-and-modification/history","analysis":"/api/acts/ad-b727-58-amdt-1-main-landing-gear-actuator-beam-support-link-inspection-and-modification/analysis","conflicts":"/api/acts/ad-b727-58-amdt-1-main-landing-gear-actuator-beam-support-link-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-b727-58-amdt-1-main-landing-gear-actuator-beam-support-link-inspection-and-modification/important-cases","documents":"/api/acts/ad-b727-58-amdt-1-main-landing-gear-actuator-beam-support-link-inspection-and-modification/documents"}}