{"id":"F2006B11398","name":"AD/MU-2/68 - Wing Tip Fuel Tank Attach Brackets","slug":"ad-mu-2-68-wing-tip-fuel-tank-attach-brackets","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":57299,"registerId":"commonwealth-F2006B11398-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.001.png)\n\n![](image.001.png)  \nFor the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.\n\nMitsubishi MU-2 Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/MU-2/68 Wing Tip Fuel Tank Attach Bra","sectionType":"part","heading":"AD/MU-2/68 Wing Tip Fuel Tank Attach Brackets 12/2001","content":"# AD/MU-2/68 Wing Tip Fuel Tank Attach Brackets 12/2001\n\nTX\n\nApplicability: Model MU-2B, MU-2B-10, \\-15, \\-20, \\-25, \\-26, \\-30, \\-35, \\-36, with serial numbers 008\n\nthrough 347, and 501 through 696; except 313, 321, 652, and 661.\n\nRequirement: Inspect by fluorescent penetrant method, the LH and RH wing tip fuel tank attach brackets, in accordance with Mitsubishi MU-2 Service Bulletin No. 236, dated 28 August 2001.\n\nNote: JCAB AD TCD-5747-2001 refers.\n\nCompliance: Within 25 flight hours or within 6 months after 3 October 2001, whichever occurs first.\n\nThis Airworthiness Directive becomes effective on 3 October 2001.\n\nBackground: Reports were received of cracking of attach brackets of the wing tip fuel tanks.\n\n![Signature of David Alan Villiers Delegate of the Civil Aviation Safety Authority](image.002.png)  \n\nDavid Alan Villiers\n\nDelegate of the Civil Aviation Safety Authority 27 September 2001\n\n![](image.001.png)","sortOrder":1}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This Airworthiness Directive maintains its original narrow scope: addressing a specific reported safety defect (cracking wing tip fuel tank brackets) on specific aircraft models. There is no evidence of scope creep; it remains a targeted safety intervention."},"complexity_factors":["Single, specific technical requirement (one inspection method)","Limited applicability (specific aircraft models and serial numbers only)","Clear compliance deadline (25 flight hours or 6 months)","No nested exceptions or conditional logic beyond the serial number exclusions","Short document (approximately 250 words)","Only one defined reference (Mitsubishi Service Bulletin No. 236)"],"plain_english_summary":"This safety order requires owners/operators of certain Mitsubishi MU-2B aeroplanes (serials 008–347 and 501–696, excluding four specific aircraft) to inspect the left and right wing-tip fuel tank attach brackets for cracks. A fluorescent penetrant inspection must be done per Mitsubishi Service Bulletin No. 236 (Aug 2001) within 25 flight hours or six months of 3 October 2001. Cracked brackets could let a tank detach in flight, posing a serious safety hazard."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD limits action to the specified MU‑2 models and serial‑number ranges and prescribes a focused inspection procedure to address reported cracking. It does not expand applicability beyond the listed aircraft or add additional mandated modifications; the scope matches the unsafe condition described in the Background and the targeted Requirement."},"complexity_factors":["Narrow applicability: specific MU‑2 models and detailed serial-number ranges with exceptions (Applicability).","Mandated inspection method: fluorescent penetrant testing required (Requirement).","Mandatory reliance on manufacturer instructions: inspection must follow Mitsubishi Service Bulletin No. 236 (Requirement).","Short compliance window combining flight‑hours and calendar time: within 25 flight hours or 6 months from 3 Oct 2001 (Compliance).","Regulatory basis and signature by CASA delegate under subregulation 39.1(1) of CAR 1998 (prefatory text and signature).","Cross-reference to a foreign authority AD (JCAB AD TCD‑5747‑2001), indicating international coordination (Note).","Operational consequence implied by background (reports of cracking) — potential for out-of-service time if defects found (Background)."],"plain_english_summary":"**What it does:** This AD requires operators of specified Mitsubishi MU-2 aeroplanes to have the left and right wing‑tip fuel‑tank attach brackets inspected using fluorescent penetrant in accordance with Mitsubishi Service Bulletin No. 236. **Who it affects and why it matters:** Affects owners/operators of the listed MU‑2 models/serial numbers; CASA issued it after reports of cracked attach brackets. Compliance is required within 25 flight hours or six months from 3 October 2001, shifting inspection cost and any resulting downtime onto operators."},"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"}},"importantCases":[],"_links":{"self":"/api/acts/ad-mu-2-68-wing-tip-fuel-tank-attach-brackets","history":"/api/acts/ad-mu-2-68-wing-tip-fuel-tank-attach-brackets/history","analysis":"/api/acts/ad-mu-2-68-wing-tip-fuel-tank-attach-brackets/analysis","conflicts":"/api/acts/ad-mu-2-68-wing-tip-fuel-tank-attach-brackets/conflicts","importantCases":"/api/acts/ad-mu-2-68-wing-tip-fuel-tank-attach-brackets/important-cases","documents":"/api/acts/ad-mu-2-68-wing-tip-fuel-tank-attach-brackets/documents"}}