{"id":"F2006B11353","name":"AD/MU-2/24 Amdt 1 - Nose Landing Gear L/H Drag Strut Attach Bracket - Inspection and Replacement","slug":"ad-mu-2-24-amdt-1-nose-landing-gear-l-h-drag-strut-attach-bracket-inspection-and-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":57247,"registerId":"commonwealth-F2006B11353-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/MU-2/24 Amdt 1 - Nose Landing Gear L/H Drag Strut Attach Bracket - Inspection and Replacement","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nMitsubishi MU-2 Series Aeroplanes\n\nAD/MU-2/24\n\nAmdt 1\n\n  \n\nNose Landing Gear L/H Drag Strut Attach Bracket - Inspection and Replacement\n\n  \n11/83\n\nApplicability: All models MU-2B-30/-35/-36 with S/Nos. 501 thru 696, excepting S/Nos. 652 and 661. All models MU-2B-35/-36A/-60 with S/Nos. 652SA, 661SA, 697SA through 799SA, 1501SA through 1553SA. 1555SA through 1562SA.\n\nDocument: 1. Mitsubishi SB No. 195. or\n\n2. Mitsubishi Aircraft International S.B. No. SBO 46/32-005 whichever is applicable.\n\nNote: JCAB AD No. TCD-2263-83 also refers.\n\nCompliance: Unless already accomplished:\n\n    Inspect within 100 hours time in service after 30 June 1983 for components with more than 1000 hours time in service.\n\n    2. Inspect within 100 hours time in service after component achieves 1000 hours time in service.\n\n    3. Replace with improved bracket P/No. 030A-31121-11 in accordance with requirement document.\n\nBackground: This Directive has been raised in issue to include additional aircraft model applicability and requirement document references.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Yes. The amendment explicitly expanded the AD's applicability to additional MU-2 models/serial numbers and added or clarified the requirement document references. The instrument's Background states it was \"raised in issue to include additional aircraft model applicability and requirement document references.\" (Background)."},"complexity_factors":["Serial-number-specific applicability with explicit inclusions and exceptions increases tracking burden (Applicability).","Dual-timing compliance triggers: (a) inspect within 100 hours if component already >1000 hours TIS after 30 June 1983; (b) inspect within 100 hours once component reaches 1000 hours TIS (Compliance).","Mandatory replacement with a single specified part number and reference to requirement documents creates a lock-in to published service bulletins (Compliance; Document).","Multiple service bulletin references and an external JCAB AD cross-reference require operators to consult several documents to confirm the correct procedure (Document; Note).","Operational impacts: inspections and replacements cause aircraft downtime and parts/labour costs, which are borne by owners/operators (Compliance).","Amendment history expands applicability and document references, so operators must review updated lists rather than relying on earlier AD versions (Background)."],"plain_english_summary":"Requires inspection and, if needed, replacement of the left-hand nose landing gear drag-strut attach bracket on specified Mitsubishi MU-2 series aeroplanes. Inspections must be done within 100 hours after 30 June 1983 for brackets already over 1,000 hours TIS, or within 100 hours after a bracket first reaches 1,000 hours TIS; replacement must use improved bracket P/No. 030A-31121-11 per the listed Mitsubishi service bulletin(s).\n\nThis affects owners/operators of the listed MU-2 serial numbers, who bear the inspection and replacement costs. (Compliance; Background.)"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":true,"description":"This is Amendment 1 to an existing directive (indicated by 'Amdt 1' and the 'Background' note). The original directive apparently covered fewer aircraft models. This version expands applicability to include additional MU-2 variants (notably the -36A and -60 models and the 'SA' suffixed serial numbers) and adds an alternative manufacturer service bulletin as a compliance document. The scope has grown from the original to capture more aircraft in the MU-2 family."},"complexity_factors":["Multiple applicability conditions with serial number ranges and specific exceptions (S/Nos. 652 and 661 excluded, but 652SA and 661SA included)","Two alternative compliance documents referenced (Mitsubishi SB No. 195 or SBO 46/32-005)","Dual compliance pathways based on existing flight hours versus future accumulation","Cross-reference to Japanese aviation authority directive (JCAB AD No. TCD-2263-83)","Specific part numbering requirement for replacement component"],"plain_english_summary":"Owners and operators of certain Mitsubishi MU-2 aircraft must inspect—and if required, replace—the left-hand drag strut attach bracket on the nose landing gear. The AD targets specific MU-2B series and serial ranges and requires inspections based on the bracket’s flight hours and replacement with an improved part per the manufacturer’s bulletin. It prevents possible nose-gear structural failure and collapse during ground operations, takeoff or landing."}},"importantCases":[],"_links":{"self":"/api/acts/ad-mu-2-24-amdt-1-nose-landing-gear-l-h-drag-strut-attach-bracket-inspection-and-replacement","history":"/api/acts/ad-mu-2-24-amdt-1-nose-landing-gear-l-h-drag-strut-attach-bracket-inspection-and-replacement/history","analysis":"/api/acts/ad-mu-2-24-amdt-1-nose-landing-gear-l-h-drag-strut-attach-bracket-inspection-and-replacement/analysis","conflicts":"/api/acts/ad-mu-2-24-amdt-1-nose-landing-gear-l-h-drag-strut-attach-bracket-inspection-and-replacement/conflicts","importantCases":"/api/acts/ad-mu-2-24-amdt-1-nose-landing-gear-l-h-drag-strut-attach-bracket-inspection-and-replacement/important-cases","documents":"/api/acts/ad-mu-2-24-amdt-1-nose-landing-gear-l-h-drag-strut-attach-bracket-inspection-and-replacement/documents"}}