{"id":"F2006B09755","name":"AD/F28/18 - Main Landing Gear Actuator - Inspection and Eye-Bolt Bearing","slug":"ad-f28-18-main-landing-gear-actuator-inspection-and-eye-bolt-bearing","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":54614,"registerId":"commonwealth-F2006B09755-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/F28/18 - Main Landing Gear Actuator - Inspection and Eye-Bolt Bearing","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)  Fokker F28 Series Aeroplanes\n\n \n\nAD/F28/18 Main Landing Gear Actuator - Inspection NK\n\nand Eye-Bolt Bearing\n\nApplicability: All models with S/Nos. 11003 and Subsequent and 11991 to 11994. Document:  Fokker F28 SB F28/32-72.\n\nCompliance: As detailed in the requirement document.\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 standard, narrow airworthiness directive focused on a specific mechanical component of a specific aircraft type. It has not expanded beyond its original safety purpose."},"complexity_factors":["Extremely short document (under 200 words)","No defined terms section — relies entirely on external reference to manufacturer service bulletin","No conditional logic or nested exceptions within the directive itself","Simple applicability clause using serial number ranges","Single cross-reference to external technical document (Fokker SB F28/32-72)","No legislative amendments, transitional provisions, or interpretive sections"],"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) under the Civil Aviation Regulations 1998.\n\n**What it does:** It requires owners and operators of specific **Fokker F28 series aircraft** to inspect the **main landing gear actuator** (the hydraulic mechanism that extends and retracts the wheels) and the **eye-bolt bearing** (a pivot point in the landing gear assembly).\n\n**Who it affects:** \n- All Fokker F28 models with **serial numbers 11003 and later**, plus **serial numbers 11991 through 11994**\n- Airlines, charter operators, and private owners flying these specific aircraft in Australia\n\n**Why it matters:** Landing gear failures can be catastrophic. This directive likely addresses a known defect or wear pattern that could cause the landing gear to malfunction during takeoff or landing. The reference to \"Fokker F28 SB F28/32-72\" means operators must follow the specific inspection steps and timelines laid out in that manufacturer service bulletin.\n\n**What operators must do:** \n- Obtain and follow **Fokker Service Bulletin F28/32-72**\n- Complete the inspections and any required repairs within the compliance timeframe specified in that document\n- Keep records proving compliance"},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The AD text specifies an applicability set (serial numbers 11003 and subsequent, and 11991–11994) and points to a Fokker service bulletin for requirements. The instrument itself does not indicate any amendment or expansion of scope beyond those aircraft, nor does it state a change relative to an earlier instrument. Therefore there is no indication within this text that the scope has changed from a prior stated intent."},"complexity_factors":["Dependence on an external technical document (Fokker F28 SB F28/32-72) for all inspection steps and corrective actions increases implementation complexity despite the AD’s short text (see \"Document\" and \"Compliance\").","Narrow applicability by serial number requires operators to check fleet records precisely to determine applicability (see \"Applicability\").","Operational scheduling and potential aircraft downtime for inspections/repairs add logistical complexity for operators.","Potential need for technical clarification or parts supply from the manufacturer if the service bulletin lacks detail, creating coordination complexity between operators, the manufacturer, and CASA.","Administrative burden to obtain, track and record compliance with the referenced bulletin rather than having self-contained requirements in the AD."],"plain_english_summary":"This Airworthiness Directive from CASA requires operators of specific Fokker F28 airframes (S/N 11003 onward and 11991–11994) to inspect the main landing‑gear actuator and eye‑bolt bearing in accordance with Fokker Service Bulletin F28/32‑72. \n\nIt affects only those owners/operators, who must follow the service bulletin, bear inspection and repair costs, schedule compliance, and record the work to meet airworthiness requirements."}},"importantCases":[],"_links":{"self":"/api/acts/ad-f28-18-main-landing-gear-actuator-inspection-and-eye-bolt-bearing","history":"/api/acts/ad-f28-18-main-landing-gear-actuator-inspection-and-eye-bolt-bearing/history","analysis":"/api/acts/ad-f28-18-main-landing-gear-actuator-inspection-and-eye-bolt-bearing/analysis","conflicts":"/api/acts/ad-f28-18-main-landing-gear-actuator-inspection-and-eye-bolt-bearing/conflicts","importantCases":"/api/acts/ad-f28-18-main-landing-gear-actuator-inspection-and-eye-bolt-bearing/important-cases","documents":"/api/acts/ad-f28-18-main-landing-gear-actuator-inspection-and-eye-bolt-bearing/documents"}}