{"id":"F2006B11360","name":"AD/MU-2/30 - Engine Electrical Harness - Inspection and Replacement of P/No MS25471 Electrical Cable","slug":"ad-mu-2-30-engine-electrical-harness-inspection-and-replacement-of-p-no-ms25471-electrical-cable","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":57259,"registerId":"commonwealth-F2006B11360-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/MU-2/30 - Engine Electrical Harness - Inspection and Replacement of P/No MS25471 Electrical Cable","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-2/30  Engine Electrical Harness - Inspection and Replacement of P/No MS25471 Electrical Cable\n\nApplicability: MU-2B-10/-15/-20/-25/-26 S/Nos 005 to 347 (except S/Nos 313 and 321).\n\n \n\nMU-2B-30/-35/-36 S/Nos 501 to 696 (except S/Nos 652 and 661).\n\n \n\nDocument: Mitsubishi Heavy Industries SB No. 191.\n\n \n\n1. Inspect engine electrical harness in accordance with SB No. 191.\n\n\n# 1/84\n\n \n\n2.    Replace unacceptable electrical wiring Part No. MS 25471 in accordance with SB No. 191.\n\n \n\nNote: JCAB AD No. TCD 2113-82 refers.\n\n \n\nCompliance: Part 1 - Within 100 hours time in service after 31 January 1984 and thereafter at intervals not exceeding 100 hours time in service if required.\n\n \n\nPart 2 - Within 300 hours time in service after 31 January 1984.\n\n \n\nBackground: The conducting portion of the electrical cable has been found protruding through the insulation.\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":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific wiring defect in specific aircraft. It has not expanded beyond its original purpose of mandating inspection and replacement of the MS25471 cable."},"complexity_factors":["Very short document (under 300 words)","Only 2 operative requirements (inspect and replace)","Simple applicability table with specific serial number ranges","Straightforward compliance deadlines (100 hours / 300 hours)","Single cross-reference to manufacturer service bulletin (SB No. 191)","No defined terms section, no nested conditions, no exceptions to exceptions","Single background sentence explaining the safety issue"],"plain_english_summary":"This CASA Airworthiness Directive requires owners/operators of specified early-model Mitsubishi MU-2B aeroplanes to inspect—and where necessary replace—engine electrical harness wiring identified as Part No. MS25471 after discoveries of conductor wire piercing its insulation.  \n\nIt targets affected serial-number ranges to mitigate the risk of electrical failure, fire, or engine loss by forcing corrective action on a known manufacturing defect."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument defines a focused corrective requirement for specific MU-2B models and serial numbers to inspect and, if necessary, replace MS25471 wiring per SB No. 191. The document itself does not indicate any change to that stated scope."},"complexity_factors":["Narrow, specific applicability: multiple MU-2B variants with detailed serial-number inclusions and exclusions (adds administrative filtering).","Two-tier compliance timetable: Part 1 inspection within 100 hours with possible 100‑hour repeat intervals; Part 2 replacement within 300 hours.","Dependence on an external document for procedures and acceptance criteria: Mitsubishi Heavy Industries SB No. 191.","Single identified part number (MS25471) targeted for replacement, requiring parts sourcing and potential inventory checks.","Safety-critical, physical inspection and repair work imposes direct labour and downtime costs on operators.","Cross-reference to a foreign authority AD (JCAB) introduces potential regulatory coordination or interpretation issues."],"plain_english_summary":"This airworthiness directive requires operators of specified Mitsubishi MU-2B aeroplanes (listed by model and serial number) to inspect the engine electrical harness per Mitsubishi Service Bulletin No. 191 and to replace any wiring with Part No. MS25471 found to be unacceptable. The action responds to findings of conductor protrusion through insulation. Inspections are due within 100 hours and replacements within 300 hours, so operators must schedule and pay for inspection, remedial replacement and compliance with the service bulletin."}},"importantCases":[],"_links":{"self":"/api/acts/ad-mu-2-30-engine-electrical-harness-inspection-and-replacement-of-p-no-ms25471-electrical-cable","history":"/api/acts/ad-mu-2-30-engine-electrical-harness-inspection-and-replacement-of-p-no-ms25471-electrical-cable/history","analysis":"/api/acts/ad-mu-2-30-engine-electrical-harness-inspection-and-replacement-of-p-no-ms25471-electrical-cable/analysis","conflicts":"/api/acts/ad-mu-2-30-engine-electrical-harness-inspection-and-replacement-of-p-no-ms25471-electrical-cable/conflicts","importantCases":"/api/acts/ad-mu-2-30-engine-electrical-harness-inspection-and-replacement-of-p-no-ms25471-electrical-cable/important-cases","documents":"/api/acts/ad-mu-2-30-engine-electrical-harness-inspection-and-replacement-of-p-no-ms25471-electrical-cable/documents"}}