{"id":"F2006B11294","name":"AD/ML-M4/8 - Flight Control System Pulley - Modification","slug":"ad-ml-m4-8-flight-control-system-pulley-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":57115,"registerId":"commonwealth-F2006B11294-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/ML-M4/8 - Flight Control System Pulley - 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-M4/8 Flight Control System Pulley - Modification 2/70\n\nApplicability: All models. Document: Maule SL No. 19.\n\nCompliance: Within 100 hours time in service after 20 February 1970.\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\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1687},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow scope — a specific safety modification for flight control pulleys on Maule M-4 aircraft. No expansion of scope is evident."},"complexity_factors":["Single, unambiguous operational requirement with no exceptions or conditional clauses","Applicability limited to one specific aircraft series (Maule M-4)","Only one external reference document (Service Letter No. 19)","Simple calendar/flight-hour deadline with no nested triggers"],"plain_english_summary":"**What this is:** An Airworthiness Directive (AD) — a mandatory safety order issued by the Civil Aviation Safety Authority (CASA) that legally requires aircraft owners to fix a specific mechanical defect.\n\n**What it requires:** Owners and operators of **Maule M-4 series aircraft** must modify the pulleys in the flight control system. These pulleys are the small wheels that guide the cables controlling the aircraft's wing flaps and tail surfaces (ailerons, elevator, and rudder).\n\n**How to comply:** You must carry out the modification exactly as described in **Maule Service Letter No. 19** (the manufacturer's technical instructions) within **100 hours of flying time** after 20 February 1970.\n\n**Why it matters:** Flight control pulleys are critical to safe flight. If a pulley fails, the pilot could lose control of the aircraft. This directive ensures all affected aircraft received a necessary hardware upgrade to prevent in-flight mechanical failure."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ml-m4-8-flight-control-system-pulley-modification","history":"/api/acts/ad-ml-m4-8-flight-control-system-pulley-modification/history","analysis":"/api/acts/ad-ml-m4-8-flight-control-system-pulley-modification/analysis","conflicts":"/api/acts/ad-ml-m4-8-flight-control-system-pulley-modification/conflicts","importantCases":"/api/acts/ad-ml-m4-8-flight-control-system-pulley-modification/important-cases","documents":"/api/acts/ad-ml-m4-8-flight-control-system-pulley-modification/documents"}}