{"id":"F2006B11347","name":"AD/MU-2/19 - Engine Nacelle Upper Door Rod Assembly - Removal and Modification","slug":"ad-mu-2-19-engine-nacelle-upper-door-rod-assembly-removal-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":57233,"registerId":"commonwealth-F2006B11347-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/MU-2/19 - Engine Nacelle Upper Door Rod Assembly - Removal 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)  Mitsubishi MU-2 Series Aeroplanes\n\n \n\n# AD/MU-2/19  Engine Nacelle Upper Door Rod Assembly - Removal and Modification\n\nApplicability: All models with S/Nos. prior to 697, except S/Nos. 313, 321, 652 and 661. Document:               Mitsubishi SB No. 179.\n\n# 1/78\n\nCompliance: Unless already accomplished, within 100 hours time in service after 28 February 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","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1681},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"The directive remains confined to its original specific purpose: mandating a single mechanical modification for a discrete subset of aircraft. No expansion of scope has occurred."},"complexity_factors":["Single operative provision with no subsections or conditional branches","No definitions section or interpretative provisions","No cross-references to other legislation beyond the enabling Part 39","Simple applicability test based on aircraft serial numbers only"],"plain_english_summary":"This is a mandatory **Airworthiness Directive** (a legally binding safety order) issued by the Civil Aviation Safety Authority for specific Mitsubishi MU-2 aircraft.\n\n**What it requires:**\nOwners and operators must **remove and modify the engine nacelle upper door rod assembly** (a structural support rod on the engine housing door) according to Mitsubishi Service Bulletin No. 179.\n\n**Who is affected:**\nAll Mitsubishi MU-2 models with serial numbers prior to 697, **except** serial numbers 313, 321, 652, and 661.\n\n**When it had to be done:**\nUnless already completed, the work had to be finished within **100 hours of flight time** after 28 February 1978.\n\n**Why it matters:**\nThese directives are enforceable safety rules. Operating an aircraft without completing the required modification violates aviation law and grounds the aircraft until compliance is achieved."}},"importantCases":[],"_links":{"self":"/api/acts/ad-mu-2-19-engine-nacelle-upper-door-rod-assembly-removal-and-modification","history":"/api/acts/ad-mu-2-19-engine-nacelle-upper-door-rod-assembly-removal-and-modification/history","analysis":"/api/acts/ad-mu-2-19-engine-nacelle-upper-door-rod-assembly-removal-and-modification/analysis","conflicts":"/api/acts/ad-mu-2-19-engine-nacelle-upper-door-rod-assembly-removal-and-modification/conflicts","importantCases":"/api/acts/ad-mu-2-19-engine-nacelle-upper-door-rod-assembly-removal-and-modification/important-cases","documents":"/api/acts/ad-mu-2-19-engine-nacelle-upper-door-rod-assembly-removal-and-modification/documents"}}