{"id":"F2006B09682","name":"AD/F27/114 Amdt 1 - Main Landing Gear Torque Links","slug":"ad-f27-114-amdt-1-main-landing-gear-torque-links","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115827,"registerId":"commonwealth-F2006B09682-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/F27/114 Amdt 1 - Main Landing Gear Torque Links","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 F27 Series Aeroplanes\n\n \n\n# AD/F27/114\n\nAmdt 1\n\nApplicability: All models.\n\n# Main Landing Gear Torque Links 11/87\n\n \n\nRequirement: Action in accordance with Dowty Rotol SB 32-161B R2. Compliance:  Prior to 1 January 1989.\n\nBackground: The manufacturer reports a number of torque links have been incorrectly machined during manufacture. Amendment 1 of this Directive references Revision 2 of the Requirement Document which extends the batch numbers identified as being incorrectly machined.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\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 routine technical amendment to an airworthiness directive. Amendment 1 simply updates the referenced service bulletin to a newer revision that identifies additional batch numbers of defective parts. The core purpose — ensuring defective torque links are identified and rectified — remains unchanged. The scope has not expanded beyond the original safety intent."},"complexity_factors":["Extremely short document (under 200 words)","Only one substantive requirement referencing an external technical document (Dowty Rotol SB 32-161B R2)","No defined terms section","No cross-references to other legislation beyond the enabling regulation (CAR 1998 Part 39)","Simple linear structure: applicability → requirement → compliance deadline → background","Single amendment expanding scope of affected parts (batch numbers) without altering the core obligation"],"plain_english_summary":"**What this is:** An Airworthiness Directive (AD) — essentially a mandatory safety notice issued by Australia's Civil Aviation Safety Authority (CASA) telling aircraft operators they must fix a specific mechanical problem.\n\n**What it does:** This AD applies to all Fokker F27 aircraft (a Dutch-built regional turboprop plane). It requires operators to inspect and potentially replace the **main landing gear torque links** — metal components that help the landing gear wheels stay aligned when the gear retracts and extends.\n\n**The problem:** The manufacturer (Dowty Rotol) discovered some torque links were **machined incorrectly during production** — meaning they were made with the wrong dimensions or specifications. This could lead to structural failure of the landing gear.\n\n**What operators must do:** Follow the instructions in **Dowty Rotol Service Bulletin 32-161B Revision 2** (a technical repair notice from the parts maker). This updated version (Amendment 1) expands the list of affected batch numbers — meaning more parts are now flagged as potentially defective than in the original directive.\n\n**Deadline:** The work had to be completed before **1 January 1989**.\n\n**Why it matters:** Landing gear failure during takeoff or landing could cause a catastrophic accident. ADs are legally binding — operators cannot fly the aircraft until they comply."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Amendment 1 broadened the set of affected parts by referencing Revision 2 of the Dowty Rotol service bulletin, which extends the batch numbers identified as incorrectly machined. Mechanically, that increases the population of torque links/aircraft subject to the AD compared with the original directive (Background)."},"complexity_factors":["Mandatory reliance on an external technical document (Dowty Rotol SB 32-161B R2) for the precise work required","Requirement to check batch/serial numbers against lists that were expanded by the amendment (identification task)","A firm compliance deadline (prior to 1 January 1989) requiring scheduling and resourcing","Universal applicability to all Fokker F27 models increases the number of affected operators","Amendment history: the AD references a specific revision of the service bulletin, so compliance depends on correct version control"],"plain_english_summary":"This AD mandates that owners/operators of all Fokker F27 series comply with Dowty Rotol SB 32-161B Revision 2 to inspect and, if needed, repair or replace main landing gear torque links identified as incorrectly machined. Work must be done before 1 January 1989; operators bear the cost. Amendment 1 expands the batch numbers covered, increasing affected aircraft."}},"importantCases":[],"_links":{"self":"/api/acts/ad-f27-114-amdt-1-main-landing-gear-torque-links","history":"/api/acts/ad-f27-114-amdt-1-main-landing-gear-torque-links/history","analysis":"/api/acts/ad-f27-114-amdt-1-main-landing-gear-torque-links/analysis","conflicts":"/api/acts/ad-f27-114-amdt-1-main-landing-gear-torque-links/conflicts","importantCases":"/api/acts/ad-f27-114-amdt-1-main-landing-gear-torque-links/important-cases","documents":"/api/acts/ad-f27-114-amdt-1-main-landing-gear-torque-links/documents"}}