{"id":"F2006B11401","name":"AD/MU-2/70 - Pneumatic Lines","slug":"ad-mu-2-70-pneumatic-lines","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":57302,"registerId":"commonwealth-F2006B11401-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\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 CASR 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\n![](image.001.png)  \n\nMitsubishi MU-2 Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/MU-2/70 Pneumatic Lines 7/2003","sectionType":"part","heading":"AD/MU-2/70 Pneumatic Lines 7/2003","content":"# AD/MU-2/70 Pneumatic Lines 7/2003\n\nApplicability: Mitsubishi Heavy Industries Model MU-2B –10, \\-15, \\-20, \\-25, and \\-26 aeroplanes Serial Number S/N008 through 347 inclusive except S/N 313 and 321, and MU-2B\n\n\\-30, \\-35, and \\-36 aeroplanes S/N 501 through 696 inclusive except S/N 652 and 661.\n\nRequirement: As detailed in Mitsubishi MU-2 Service Bulletin 239.\n\nNote: Japanese AD TCD-6127-2003 refers.\n\nCompliance: At the next periodic inspection or within 6 months from the effective date of this Directive, whichever occurs first.\n\nThis Airworthiness Directive becomes effective on 10 July 2003.\n\nBackground: Use of the incorrect clamps can lead to leakage in certain pneumatic lines and loss of multiple system functions.\n\n![Signature of Jim Coyne Delegate of the Civil Aviation Safety Authority](image.002.png)  \n\nJim Coyne\n\nDelegate of the Civil Aviation Safety Authority 28 May 2003\n\n![](image.001.png)","sortOrder":1}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — addressing a specific clamping defect in pneumatic lines on specific Mitsubishi MU-2 aircraft. There is no evidence of scope creep; it is a targeted safety directive referencing a single manufacturer service bulletin."},"complexity_factors":["Very short document (under 300 words)","Only 4 defined structural sections (Applicability, Requirement, Compliance, Background)","Single cross-reference to external document (Mitsubishi Service Bulletin 239)","Simple conditional logic: 'whichever occurs first' compliance timing","No nested exceptions or complex definitions","Narrow, specific applicability (two aircraft model ranges with explicit serial number exclusions)"],"plain_english_summary":"This AD requires owners/operators of certain Mitsubishi MU-2B aeroplanes to inspect and repair pneumatic (air pressure) lines because incorrect clamps were fitted, risking leaks and multiple system failures. It applies to most MU-2B-10–26 and MU-2B-30–36 serial ranges (with a few exceptions).\n\nCompliance must follow Mitsubishi Service Bulletin 239 by the next scheduled inspection or within six months of 10 July 2003. This correction is mandatory for flight safety."},"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive stays within its original, narrow technical scope: it targets incorrect pneumatic line clamps on specified MU-2B models and serial numbers and mandates correction per Service Bulletin 239. It does not expand to other models, systems, or broader operational rules; obligations are limited to inspection/repair and the stated compliance window (Applicability; Requirement; Compliance; Background)."},"complexity_factors":["Narrow applicability by model and explicit serial-number ranges reduces scope and selection complexity (Applicability).","Mandatory reliance on an external technical document — Mitsubishi MU-2 Service Bulletin 239 — for corrective action (Requirement).","Short, fixed compliance window tied to routine inspections or a six-month deadline increases scheduling pressure (Compliance).","Technical corrective work requires qualified maintenance personnel and parts, creating operational and cost burdens for operators (implied by Requirement).","Reference to a foreign AD (Japanese AD TCD-6127-2003) for context but not for substantive content adds a cross-jurisdictional note (Note)."],"plain_english_summary":"**This Airworthiness Directive requires owners/operators of specified Mitsubishi MU-2B aeroplanes to inspect and, if necessary, correct pneumatic line clamps in accordance with Mitsubishi Service Bulletin 239.** It responds to incorrect clamps that can cause pneumatic leaks and loss of multiple system functions (Applicability; Requirement; Background). Compliance is required at the next periodic inspection or within six months; owners/operators bear the cost of inspection and any repairs, and the CASA delegate enforces the timing and content (Requirement; Compliance)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-mu-2-70-pneumatic-lines","history":"/api/acts/ad-mu-2-70-pneumatic-lines/history","analysis":"/api/acts/ad-mu-2-70-pneumatic-lines/analysis","conflicts":"/api/acts/ad-mu-2-70-pneumatic-lines/conflicts","importantCases":"/api/acts/ad-mu-2-70-pneumatic-lines/important-cases","documents":"/api/acts/ad-mu-2-70-pneumatic-lines/documents"}}