{"id":"F2006B02172","name":"AD/AC-100/3 - Rudder Bellcrank Assembly - Modification","slug":"ad-ac-100-3-rudder-bellcrank-assembly-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41402,"registerId":"commonwealth-F2006B02172-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AC-100/3 - Rudder Bellcrank Assembly - 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 Bellcrank Assembly - Modification,3\ntitle: Airworthiness Directive - AD/AC-100/3 - Rudder Bellcrank Assembly - 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\nAD/AC-100/3 Rudder Bellcrank Assembly - Modification 8/68\n\nApplicability: All models with S/Nos. 013 to 098. Document:  Aero Commander Model 100 SB 1006. Compliance:               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","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":869},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"The directive remains precisely targeted at its original purpose: mandating a specific airframe modification for a defined subset of aircraft. No scope creep or expansion beyond the technical safety issue identified."},"complexity_factors":["Single unambiguous compliance requirement","No defined terms or interpretation sections","No conditional exceptions or nested logic","Simple reference to one external technical document (Service Bulletin 1006)"],"plain_english_summary":"**What this is:** A mandatory safety order requiring immediate modification of the rudder bellcrank assembly on specific light aircraft.\n\n**Who it affects:** Owners and operators of **S.L. Industries Commander 100 Series and Volair 10 Series aeroplanes** with serial numbers between 013 and 098.\n\n**What you must do:** Immediately modify the rudder bellcrank assembly (the mechanical linkage that transfers pilot pedal input to the rudder) according to the instructions in **Aero Commander Service Bulletin 1006**. The directive uses the term \"forthwith,\" which means compliance is required immediately without delay.\n\n**Why it matters:** This modification addresses a safety defect in the rudder control system. The rudder is essential for controlling the aircraft's yaw (left-right movement) and maintaining directional stability, particularly during takeoff, landing, and engine-out situations. A faulty bellcrank assembly could lead to reduced or lost rudder control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ac-100-3-rudder-bellcrank-assembly-modification","history":"/api/acts/ad-ac-100-3-rudder-bellcrank-assembly-modification/history","analysis":"/api/acts/ad-ac-100-3-rudder-bellcrank-assembly-modification/analysis","conflicts":"/api/acts/ad-ac-100-3-rudder-bellcrank-assembly-modification/conflicts","importantCases":"/api/acts/ad-ac-100-3-rudder-bellcrank-assembly-modification/important-cases","documents":"/api/acts/ad-ac-100-3-rudder-bellcrank-assembly-modification/documents"}}