{"id":"F2006B11293","name":"AD/ML-M4/7 - Aileron Control System - Modification","slug":"ad-ml-m4-7-aileron-control-system-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":57112,"registerId":"commonwealth-F2006B11293-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/ML-M4/7 - Aileron Control System - Modification","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)  Maule M-4 Series Aeroplanes\n\n \n\nAD/ML-M4/7 Aileron Control System - Modification 10/69\n\nApplicability: All models.\n\n \n\nRequriement: Remove the bolt attaching the most forward aileron control system pulley to the control column.\n\n \n\nReplace the pulley assembly with the addition of washers AN970-5 and AN960-516, and bolt AN5-27 instead of the original bolt in the following order from front to rear:\n\n \n\n1. AN5-27 Bolt - head forward.\n\n\n \n\n2.    AN970-5 Washer\n\n \n\n3.    AN960-516 Washer\n\n \n\n4.    Original Pulley\n\n \n\n5.    Control Column\n\n \n\n6.    AN960-516 Washer 7. AN365-524 Nut.\n\nCompliance: Within 25 hours time in service after 1 October 1969.\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 for a specific aircraft type. It has not expanded beyond its original purpose of mandating a single hardware modification to address a known defect."},"complexity_factors":["Very short document (approximately 150 words)","Only 1 defined term implicitly referenced (AN hardware part numbers, which are standard aviation industry codes)","No cross-references to other legislation or regulations","Simple linear procedural requirement with no conditional logic or exceptions","Single compliance pathway with clear deadline","Straightforward mechanical instruction with enumerated parts list"],"plain_english_summary":"This is an **Airworthiness Directive** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for aircraft.\n\n**What it does:**\nIt requires owners and operators of **Maule M-4 series aeroplanes** (a type of light aircraft) to modify the aileron control system. Specifically, they must replace a bolt in the control column pulley assembly with a new configuration that includes additional washers and a different bolt.\n\n**The fix involves:**\n- Removing the existing bolt from the forward aileron control pulley\n- Installing a new assembly in this exact order:\n  1. AN5-27 bolt (head facing forward)\n  2. AN970-5 washer\n  3. AN960-516 washer\n  4. The original pulley\n  5. The control column\n  6. Another AN960-516 washer\n  7. AN365-524 nut\n\n**Who it affects:**\nAnyone who owns or operates any model of Maule M-4 aircraft.\n\n**Why it matters:**\nThis modification addresses a safety defect in the aileron control system — the part that helps steer the aircraft left and right. The original bolt configuration apparently posed a risk (likely of failure or improper function), and this directive mandates a specific hardware fix to prevent potential loss of control.\n\n**Deadline:**\nThe work had to be completed within 25 hours of flight time after 1 October 1969."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive sets out a single, targeted hardware modification for the forward aileron pulley and a specified compliance deadline. The text does not indicate any expansion or narrowing of that scope beyond the parts and procedure listed; therefore there is no change from the stated instrument scope in the source material."},"complexity_factors":["Narrow technical scope limited to one hardware change (one pulley attachment)","Clear, specific parts and assembly order (AN5-27, AN970-5, AN960-516, AN365-524) reduces ambiguity","Short compliance timeframe (25 hours TIS after specified date) imposes scheduling pressure","No procedural or administrative requirements (e.g., reporting, approvals) specified in text","Applies to all models of the type but only one specific location/component"],"plain_english_summary":"This AD requires owners/operators of all Maule M‑4 series airplanes to remove the forward aileron pulley bolt and reassemble it with a specified AN5‑27 bolt, two specified washers and a specified nut in the listed order, completed within 25 hours TIS after 1 October 1969. It prescribes exact parts and assembly, placing the compliance and funding responsibility on the aircraft owner/operator."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ml-m4-7-aileron-control-system-modification","history":"/api/acts/ad-ml-m4-7-aileron-control-system-modification/history","analysis":"/api/acts/ad-ml-m4-7-aileron-control-system-modification/analysis","conflicts":"/api/acts/ad-ml-m4-7-aileron-control-system-modification/conflicts","importantCases":"/api/acts/ad-ml-m4-7-aileron-control-system-modification/important-cases","documents":"/api/acts/ad-ml-m4-7-aileron-control-system-modification/documents"}}