{"id":"F2006B02176","name":"AD/AC-100/7 - Rudder Control System - Inspection and Modification","slug":"ad-ac-100-7-rudder-control-system-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41406,"registerId":"commonwealth-F2006B02176-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AC-100/7 - Rudder Control System - Inspection and Modification","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-description: CASA Airworthiness Directive\nmeta-generator: Aspose.Words for .NET 22.10.0\nmeta-keywords: Issue 8/1968,Aircraft below 5700 kg,S.L. Industries Commander 100 Series and Volair 10 Series Aeroplanes,Rudder Control System - Inspection and Modification,7\ntitle: Airworthiness Directive - AD/AC-100/7 - Rudder Control System - Inspection and Modification\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)  S.L. Industries Commander 100 Series and Volair 10 Series Aeroplanes\n\n \n\n# AD/AC-100/7 Rudder Control System - Inspection\n\nand Modification\n\nApplicability: All models with S/Nos. 001 to 250.\n\n# 8/68\n\n \n\nRequirement: 1. Remove paint over an area extending 3/4 of an inch aft of the cable attachment hole in the left and right rudder control arms P/N 35321 and inspect for cracking using a 10 power glass.\n\n2. Modify both arms P/N 35321 in accordance with Aero Commander SB No. 1009. Compliance:              Inspect daily until modified. Modify within 100 hours’ time in service from 1 August\n\n1968.\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, targeted safety directive focused on a specific mechanical defect in specific aircraft. It has not expanded beyond its original purpose of addressing rudder control arm cracking in early-production Commander and Volair aircraft."},"complexity_factors":["Very short document (under 200 words)","Only 2 operative requirements (inspect and modify)","Single applicability criterion (serial numbers 001-250)","No defined terms section","No cross-references to other legislation (only references manufacturer's Service Bulletin)","Simple compliance timeline (daily inspections + 100-hour deadline)","No conditional logic or exceptions"],"plain_english_summary":"Owners/operators of S.L. Industries Commander 100 and Volair 10 aeroplanes (serials 001–250) must inspect and modify left and right rudder control arms (P/N 35321) to prevent cracks and loss of rudder control. Daily inspections—removing paint at cable holes and checking with 10× magnification—are required until the permanent modification per Service Bulletin No. 1009 is completed. The modification must be done within 100 flight hours from 1 August 1968."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument sets a specific, targeted requirement for inspection and modification of rudder control arms on the listed serial-numbered aircraft. The text contains no amendment or extension beyond that original directive, so the scope as stated does not appear to change prior intent."},"complexity_factors":["Narrow applicability to specific models and serial numbers (Applicability: All models with S/Nos. 001 to 250) — limits scope but requires fleet-level checks.","Technical inspection requirement (remove paint 3/4 inch aft of cable attachment hole; inspect using a 10 power glass) — needs trained maintenance personnel and precise work.","Mandatory modification tied to external document (Modify in accordance with Aero Commander SB No. 1009) — dependency on locating and following a Service Bulletin.","Operational compliance timing (Inspect daily until modified; modify within 100 hours’ time in service from 1 August 1968) — creates ongoing inspection burden and tracking/record‑keeping needs.","Clear, prescriptive steps reduce interpretive ambiguity but transfer practical costs and labour to owners/operators (inspection time, paint removal, parts/modify work)."],"plain_english_summary":"This Airworthiness Directive requires operators of S.L. Industries Commander 100 and Volair 10 aeroplanes (serial nos. 001–250) to inspect and modify the rudder control arms (P/N 35321). Operators must remove paint over a specified area, inspect that area for cracking with a 10× magnifier daily until the part is modified, and carry out the modification per Aero Commander Service Bulletin No. 1009 within 100 hours’ time in service from 1 August 1968. The directive imposes inspection, repair and compliance costs on aircraft owners/operators."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ac-100-7-rudder-control-system-inspection-and-modification","history":"/api/acts/ad-ac-100-7-rudder-control-system-inspection-and-modification/history","analysis":"/api/acts/ad-ac-100-7-rudder-control-system-inspection-and-modification/analysis","conflicts":"/api/acts/ad-ac-100-7-rudder-control-system-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-ac-100-7-rudder-control-system-inspection-and-modification/important-cases","documents":"/api/acts/ad-ac-100-7-rudder-control-system-inspection-and-modification/documents"}}