{"id":"F2006B11372","name":"AD/MU-2/41 Amdt 1 - Generator Wiring","slug":"ad-mu-2-41-amdt-1-generator-wiring","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":57272,"registerId":"commonwealth-F2006B11372-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/MU-2/41 Amdt 1 - Generator Wiring","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\nAD/MU-2/41\n\nAmdt 1\n\n\nGenerator Wiring 1/89\n\n \n\nApplicability: MU 2B-25, MU 2B-26 and MU 2B-35 Serial No’s 264 to 312, 314 to 320, 586 to 651\n\nand 653.\n\n \n\nRequirement: Action in accordance with MU 2 SB 201A.\n\n \n\nNote: FAA AD 87-12-02 and Japanese AD TCD - 2545-1-88 refer.\n\n \n\nCompliance: Within 100 hours time in service after 26 January 1989.\n\n \n\nBackground: To prevent burning of generator shield jumper wires. Amdt 1 to this Directive is issued to amend the Requirement document only.\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":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The text states that Amendment 1 is issued only to amend the Requirement document. The AD as provided keeps the same applicability (models and serial numbers) and the same compliance timing; no change to which aircraft are covered or to the stated compliance timeframe is present in the supplied text. (Background; Applicability; Compliance)"},"complexity_factors":["Narrow applicability: specific MU-2 models with discrete serial number ranges increases the need for precise aircraft identification (Applicability).","External technical dependency: the AD mandates compliance by reference to an external service bulletin (MU 2 SB 201A), so understanding the required work requires consulting that document (Requirement).","Short compliance window tied to flight hours (100 hours TIS after a fixed date) requires operators to schedule maintenance against operational usage (Compliance).","Cross-references to foreign airworthiness directives add tracing and verification steps for maintainers seeking the broader technical and regulatory context (Note)."],"plain_english_summary":"What this instrument does\n\n- Applies to certain Mitsubishi MU-2 turboprop aeroplanes: MU 2B-25, MU 2B-26 and MU 2B-35 with Serial Nos. 264–312, 314–320, 586–651 and 653. (Applicability)\n- Requires the operator or maintenance organisation to carry out the work described in Mitsubishi Service Bulletin MU 2 SB 201A. (Requirement)\n- Requires that the work be completed within 100 hours time-in-service after 26 January 1989. (Compliance)\n- Notes that related foreign airworthiness directives exist (FAA AD 87-12-02 and Japanese AD TCD-2545-1-88). (Note)\n- States the safety objective: to prevent burning of generator shield jumper wires. Amendment 1 to this directive only amends the Requirement document. (Background)\n\nWho is affected and who decides\n\n- Aircraft owners and operators of the listed MU-2 serial numbers are directly affected: they must arrange for the work in the service bulletin to be done. (Applicability; Requirement)\n- The practical decision to schedule and carry out the work sits with the operator or their contracted maintenance provider. The directive specifies what must be done by reference to the service bulletin. (Requirement)\n\nWhat the directive requires operators to do (mechanics)\n\n- Follow the instructions in MU 2 SB 201A to modify or repair generator wiring as described in that service bulletin. The AD does not reproduce the technical steps; it makes compliance with that service document mandatory. (Requirement)\n- Complete that mandated work within the stated compliance window of 100 hours time-in-service after the date given. (Compliance)\n\nWho pays and what the costs are likely to be\n\n- The financial cost (parts, labour, hangar time) falls on the aircraft owner/operator because they must have the work performed to comply. (Requirement; Compliance)\n- The directive does not state specific costs or supply parts; operators must obtain parts and maintenance through normal supply and contracting channels. (Requirement)\n\nIncentives, compliance burden and risks\n\n- Incentive to comply: compliance is mandatory; non-compliance risks regulatory enforcement and leaves the aircraft exposed to the safety hazard the AD identifies (burning of generator shield jumper wires). (Requirement; Background)\n- Compliance burden is operational: arranging maintenance within the specified 100 hours time-in-service window and incurring parts and labour costs. (Requirement; Compliance)\n- The directive delegates technical details to the service bulletin; that concentrates operational discretion in whoever interprets and applies the service bulletin (the maintainer/operator). The AD itself leaves no technical discretion beyond mandating the service bulletin. (Requirement)\n\nImplementation and administrative notes\n\n- The AD references external documents (MU 2 SB 201A, FAA and Japanese ADs). Operators need access to those documents to know exactly what to do. (Requirement; Note)\n- Amendment 1 only changes the Requirement document; the AD states the amendment is restricted to that document. There is no change to the applicability or the stated compliance window within the text provided. (Background)\n\nTrade-offs and possible operational effects\n\n- The directive imposes a near-term maintenance task on a defined set of aircraft, creating upfront maintenance cost and aircraft downtime for those operators. (Applicability; Requirement; Compliance)\n- The intended effect is a reduction in a specified wiring fire risk; the AD makes compliance mandatory rather than advisory by tying the requirement to the civil aviation regulatory instrument. (Background; Requirement)\n\nSource citations (section references to the text supplied)\n\n- Applicability: listed serial numbers and model types. (Applicability)\n- Required action: \"Action in accordance with MU 2 SB 201A.\" (Requirement)\n- Compliance timing: \"Within 100 hours time in service after 26 January 1989.\" (Compliance)\n- Purpose and amendment note: \"To prevent burning of generator shield jumper wires. Amdt 1 to this Directive is issued to amend the Requirement document only.\" (Background)\n- Related foreign ADs: \"FAA AD 87-12-02 and Japanese AD TCD - 2545-1-88 refer.\" (Note)"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a targeted safety directive addressing a specific wiring defect in specific aircraft. Amendment 1 is a minor administrative update that does not expand the scope beyond the original safety purpose."},"complexity_factors":["Very short document (under 200 words)","Only 4 defined elements: applicability by specific aircraft models and serial numbers, a single referenced service bulletin (MU 2 SB 201A), compliance timeframe, and background rationale","No nested conditional logic or exceptions","No cross-references to other legislation or regulations beyond noting related FAA and Japanese ADs in a non-binding note","Single straightforward requirement: comply with manufacturer's service bulletin","Amendment 1 is purely administrative — only changes the referenced document, not the substantive requirement"],"plain_english_summary":"**What this is:** This is an Airworthiness Directive (AD) — essentially a mandatory safety notice issued by Australia's Civil Aviation Safety Authority (CASA) for specific Mitsubishi MU-2 aircraft.\n\n**What it does:** It requires owners and operators of certain Mitsubishi MU-2 aeroplanes (specific serial numbers of the 2B-25, 2B-26, and 2B-35 models) to carry out maintenance actions detailed in a manufacturer service bulletin (MU 2 SB 201A). The goal is to fix a wiring problem that could cause the generator shield jumper wires to burn.\n\n**Who it affects:** Anyone who owns, operates, or maintains the specific Mitsubishi MU-2 aircraft listed by serial number.\n\n**Why it matters:** Burning wires in an aircraft generator system is a serious fire and electrical failure risk. This directive makes the fix legally mandatory — not optional — to keep these planes airworthy and safe.\n\n**Key details:**\n- **Deadline:** The work must be done within 100 hours of flying time after 26 January 1989\n- **This version (Amendment 1):** Only updates which document you need to follow — the technical requirement itself hasn't changed\n- **Related rules:** References equivalent US (FAA) and Japanese safety directives on the same issue"}},"importantCases":[],"_links":{"self":"/api/acts/ad-mu-2-41-amdt-1-generator-wiring","history":"/api/acts/ad-mu-2-41-amdt-1-generator-wiring/history","analysis":"/api/acts/ad-mu-2-41-amdt-1-generator-wiring/analysis","conflicts":"/api/acts/ad-mu-2-41-amdt-1-generator-wiring/conflicts","importantCases":"/api/acts/ad-mu-2-41-amdt-1-generator-wiring/important-cases","documents":"/api/acts/ad-mu-2-41-amdt-1-generator-wiring/documents"}}