{"id":"F2009L00126","name":"AD/ML-M4/11 - Engine Mount - Inspection and Modification - CANCELLED","slug":"ad-ml-m4-11-engine-mount-inspection-and-modification-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":76552,"registerId":"commonwealth-F2009L00126-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Maule M-4 Series Aeroplanes","sectionType":"division","heading":"Maule M-4 Series Aeroplanes","content":"### Maule M-4 Series Aeroplanes\n\n| AD/ML-M4/11 | Engine Mount - Inspection and Modification | 2/2009 |\n| ----------- | ------------------------------------------ | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                                                                                          |\n| ------------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 12 February 2009.                                                                                                                                                                                                                                                                                           |\n| Background:  | This unique Australian AD, issued in 1978, required inspection and modification of the engine mount in accordance with Maule Service Letter No. 20 to prevent cracking. The AD compliance was within 100 hours time in service after31 October 1978. As all aircraft would have been modified by now, the AD is no longer required. |\n\n![](image.001.png)\n\nDavid Punshon  \nDelegate of the Civil Aviation Safety Authority\n\n11 December 2008","sortOrder":0},{"sectionNumber":"AD/ML-M4/11","sectionType":"part","heading":"AD/ML-M4/11","content":"## AD/ML-M4/11","sortOrder":1},{"sectionNumber":"Engine Mount - Inspection and Modificati","sectionType":"part","heading":"Engine Mount - Inspection and Modification","content":"## Engine Mount - Inspection and Modification","sortOrder":2},{"sectionNumber":"2/2009","sectionType":"part","heading":"2/2009","content":"## 2/2009","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1547},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument terminates the previous Airworthiness Directive entirely. It does not expand the scope; it removes it because the safety objective has been achieved through universal compliance since 1978."},"complexity_factors":["Single operative provision (cancellation)","No defined terms or interpretation section","No conditional logic or exceptions","Extremely short (one substantive paragraph)"],"plain_english_summary":"This instrument **cancels an old aviation safety rule** that applied to Maule M-4 series aeroplanes (light aircraft).\n\n**What the old rule required:**\nThe original directive (issued in 1978) forced owners to inspect and modify the engine mount on these specific planes to prevent dangerous cracking. Aircraft had to comply within 100 hours of flying time after 31 October 1978.\n\n**What this instrument does:**\nIt formally removes that requirement because the deadline passed over 30 years ago. The Civil Aviation Safety Authority (CASA) states that all affected aircraft would have been modified by now, making the rule unnecessary.\n\n**Who is affected:**\nOwners and operators of Maule M-4 series aircraft are no longer subject to this specific maintenance requirement, effective 12 February 2009."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ml-m4-11-engine-mount-inspection-and-modification-cancelled","history":"/api/acts/ad-ml-m4-11-engine-mount-inspection-and-modification-cancelled/history","analysis":"/api/acts/ad-ml-m4-11-engine-mount-inspection-and-modification-cancelled/analysis","conflicts":"/api/acts/ad-ml-m4-11-engine-mount-inspection-and-modification-cancelled/conflicts","importantCases":"/api/acts/ad-ml-m4-11-engine-mount-inspection-and-modification-cancelled/important-cases","documents":"/api/acts/ad-ml-m4-11-engine-mount-inspection-and-modification-cancelled/documents"}}