{"id":"F2006B11280","name":"AD/ML-M4/11 - Engine Mount - Inspection and Modification","slug":"ad-ml-m4-11-engine-mount-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":57088,"registerId":"commonwealth-F2006B11280-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/ML-M4/11 - Engine Mount - Inspection and 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-M4/11 Engine Mount - Inspection and Modification 10/78\n\nApplicability: All model M-4 with S/Nos. 4 to 91. Document:  Maule SL No. 20.\n\nCompliance: Within 100 hours time in service after 31 October 1978.\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":1829},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This remains a narrow, targeted safety directive focused solely on engine mount inspections for a specific range of Maule aircraft. The scope has not expanded beyond the original safety issue."},"complexity_factors":["Extremely brief substantive text (approximately 50 words)","Single external reference to manufacturer service letter (Maule SL No. 20) without reproducing technical procedures","Clear, unconditional applicability criteria (specific model and serial number range)","No defined terms, exceptions, or cross-references to other legislative provisions"],"plain_english_summary":"**What this is:** A mandatory safety order (called an **Airworthiness Directive** or AD) issued by the Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations.\n\n**What it requires:** Owners or operators of Maule M-4 aeroplanes (specifically those with serial numbers 4 through 91) must have the **engine mount** (the structure that holds the engine to the aircraft body) inspected and modified according to instructions in Maule Service Letter No. 20.\n\n**Why it matters:** This prevents potential structural failure of the engine mount, which could cause the engine to detach from the aircraft during flight.\n\n**Who must comply:** Anyone operating the specified Maule M-4 models (S/Nos. 4–91).\n\n**Deadline:** The work must be completed within 100 hours of flight time after 31 October 1978."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ml-m4-11-engine-mount-inspection-and-modification","history":"/api/acts/ad-ml-m4-11-engine-mount-inspection-and-modification/history","analysis":"/api/acts/ad-ml-m4-11-engine-mount-inspection-and-modification/analysis","conflicts":"/api/acts/ad-ml-m4-11-engine-mount-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-ml-m4-11-engine-mount-inspection-and-modification/important-cases","documents":"/api/acts/ad-ml-m4-11-engine-mount-inspection-and-modification/documents"}}