{"id":"F2006B08868","name":"AD/DH 104/26 - Rudder Control Pedal Reversal Lever - Inspection","slug":"ad-dh-104-26-rudder-control-pedal-reversal-lever-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52068,"registerId":"commonwealth-F2006B08868-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DH 104/26 - Rudder Control Pedal Reversal Lever - Inspection","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)  DH 104 (Dove) Series Aeroplanes\n\n \n\nAD/DH 104/26 Rudder Control Pedal Reversal Lever - Inspection 2/71\n\nApplicability: All models.\n\n \n\nDocument: Hawker Siddeley TNS CT(104) No. 219.\n\n \n\nCompliance: Within 100 hours time in service after 31 March 1971 and thereafter at intervals not exceeding 2400 hours time in service.\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 discrete, targeted safety directive focused on a specific aircraft type and component. It has not expanded beyond its original purpose of mandating inspections for the DH 104 Dove rudder pedal mechanism."},"complexity_factors":["Extremely short document (approximately 150 words)","Only one defined applicability criterion ('All models')","Single compliance requirement with clear time intervals","No cross-references to other legislation or regulations beyond the enabling Civil Aviation Regulations 1998","No conditional logic, exceptions, or nested provisions","Straightforward technical reference to a single manufacturer document"],"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 **DH 104 (Dove) series aeroplanes** — a British twin-engine aircraft from the 1940s-60s — to inspect a specific part called the **\"rudder control pedal reversal lever.\"** This lever is part of the foot pedal system that controls the aircraft's rudder (the movable surface on the tail that steers the plane left and right).\n\n**Who must comply:** Anyone operating any model of the DH 104 Dove aircraft.\n\n**What must be done:**\n- **First inspection:** Within 100 hours of flying time after 31 March 1971\n- **Repeat inspections:** Every 2,400 hours of flying time thereafter\n\n**Why it matters:** The directive references a technical document from the manufacturer (Hawker Siddeley) suggesting there was a known safety issue with this component. Without inspection, a failure of this lever could compromise directional control of the aircraft — a serious flight safety risk.\n\n**Key point:** This is not optional. Airworthiness Directives are legally binding. Non-compliance means the aircraft cannot be considered airworthy and cannot legally fly."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The text provided sets a single, narrowly framed inspection obligation and gives no indication of any change to the directive’s scope from an earlier or different statement. No amendments, expansions or narrowing of applicability are included in the excerpt, so there is no evidence here that the scope has changed from the original intent."},"complexity_factors":["Narrow technical scope (single component specified: rudder control pedal reversal lever). (Title)","Clear applicability (applies to all DH 104 models) — reduces ambiguity. (Applicability)","Simple, fixed inspection schedule with two numeric thresholds (100 hours initial; 2400 hours recurrent) — straightforward timing. (Compliance)","Reference to an external technical document (Hawker Siddeley TNS CT(104) No. 219) introduces dependency on that document for procedural detail. (Document)","No remedial actions, cost, or enforcement detail in the provided text — operators must consult the referenced document or regulators for follow-up steps, which adds implementation uncertainty. (Document; Compliance)","Terminology requires accurate record-keeping of 'hours time in service' (TIS); scheduling depends on that metric but the AD does not define TIS within the excerpt. (Compliance)"],"plain_english_summary":"This directive mandates inspection of the rudder control pedal reversal lever on all DH 104 (Dove) aeroplanes, carried out per Hawker Siddeley TNS CT(104) No. 219. The first check is required within 100 hours TIS after 31 March 1971 and thereafter at intervals not exceeding 2400 hours. It creates a recurring maintenance obligation for operators, owners and maintenance organisations, who must schedule, fund and follow the referenced procedure to maintain compliance."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dh-104-26-rudder-control-pedal-reversal-lever-inspection","history":"/api/acts/ad-dh-104-26-rudder-control-pedal-reversal-lever-inspection/history","analysis":"/api/acts/ad-dh-104-26-rudder-control-pedal-reversal-lever-inspection/analysis","conflicts":"/api/acts/ad-dh-104-26-rudder-control-pedal-reversal-lever-inspection/conflicts","importantCases":"/api/acts/ad-dh-104-26-rudder-control-pedal-reversal-lever-inspection/important-cases","documents":"/api/acts/ad-dh-104-26-rudder-control-pedal-reversal-lever-inspection/documents"}}