{"id":"F2006B11341","name":"AD/MU-2/13 - Main Landing Gear Forward Door Emergency Cable - Inspection","slug":"ad-mu-2-13-main-landing-gear-forward-door-emergency-cable-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":57222,"registerId":"commonwealth-F2006B11341-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/MU-2/13 - Main Landing Gear Forward Door Emergency Cable - Inspection","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-2/13 Main Landing Gear Forward Door Emergency Cable - Inspection\n\n\n11/75\n\n \n\nApplicability: All models MU-2B-30 with S/Nos. 502 to 547, and MU-2B-35 with S/Nos. 501 and 548 to 615. Not fitted with Cable P/N 030A-38558-41/51.\n\n \n\nDocument: Mitsubishi SB No. 170.\n\n \n\nCompliance: Within 100 hours time in service after 31 December 1975 and there- after at intervals not exceeding 100 hours time in service.\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\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 focused on a specific mechanical component in specific aircraft models. It has not expanded beyond its original purpose of ensuring the emergency landing gear cable is inspected regularly."},"complexity_factors":["Very short document (approximately 150 words)","Only 4 defined elements: applicability criteria, reference document, compliance deadline, and recurring interval","Single condition (serial number ranges) with one straightforward exception (specific part number)","No cross-references to other legislation or regulations beyond the parent Civil Aviation Regulations 1998","Simple temporal logic: one-time initial inspection plus recurring intervals","No nested exceptions, conditional clauses, or interpretive provisions"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for specific aircraft.\n\n**What it does:**\n- Requires owners and operators of certain **Mitsubishi MU-2 aeroplanes** to inspect the **emergency cable** that controls the forward door on the main landing gear.\n- The inspection must happen within **100 hours of flying time** after 31 December 1975, and then **every 100 hours of flying time** after that.\n\n**Who it affects:**\n- Owners and operators of specific Mitsubishi MU-2B-30 aircraft (serial numbers 502–547) and MU-2B-35 aircraft (serial numbers 501 and 548–615).\n- **Exception:** Aircraft already fitted with a specific replacement cable part (P/N 030A-38558-41/51) don't need to comply.\n\n**Why it matters:**\n- This directive addresses a potential safety defect in the emergency landing gear system. If the cable fails, the crew might not be able to extend the landing gear in an emergency, which could lead to a dangerous belly landing or crash.\n- Compliance is **legally mandatory** — flying without completing this inspection violates civil aviation regulations.\n\n**Key terms explained:**\n- **Airworthiness Directive (AD):** A legally enforceable notice requiring aircraft owners to fix unsafe conditions in their aircraft.\n- **Time in service:** Actual flying hours (not just calendar time).\n- **SB (Service Bulletin):** A manufacturer's technical notice recommending maintenance actions — here, Mitsubishi SB No. 170 provides the detailed inspection instructions."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The text of the directive specifies which aircraft are covered, excludes aircraft fitted with a particular cable part number, identifies Mitsubishi SB No. 170 as the procedural document, and sets initial and recurring inspection intervals. It does not indicate any amendment or change to that scope in the provided text."},"complexity_factors":["Narrow applicability defined by model and specific serial-number ranges (Applicability)","An explicit exclusion based on a particular cable part number, requiring record checks (Applicability)","Inspection procedure delegated to an external document (Mitsubishi SB No. 170), so the AD does not contain the detailed steps (Document)","Recurring inspections tied to airframe time-in-service (100-hour intervals) requiring operators to track flight hours and schedule maintenance (Compliance)","Historic reference date for the initial compliance window (within 100 hours after 31 December 1975) which is fixed in the text (Compliance)","AD text as provided does not state corrective actions or criteria for failure, creating potential ambiguity about required follow-up unless the SB supplies them (Document)"],"plain_english_summary":"This directive requires operators of specified Mitsubishi MU-2B-30/35 aeroplanes (limited serial-number ranges, excluding aircraft fitted with Cable P/N 030A-38558-41/51) to inspect the main landing-gear forward door emergency cable per Mitsubishi Service Bulletin No. 170.  \n\nInspections start within 100 hours TIS after 31‑Dec‑1975 and recur every 100 hours; owners/operators bear inspection and downtime costs and must consult SB No. 170 for the technical procedure and any corrective actions."}},"importantCases":[],"_links":{"self":"/api/acts/ad-mu-2-13-main-landing-gear-forward-door-emergency-cable-inspection","history":"/api/acts/ad-mu-2-13-main-landing-gear-forward-door-emergency-cable-inspection/history","analysis":"/api/acts/ad-mu-2-13-main-landing-gear-forward-door-emergency-cable-inspection/analysis","conflicts":"/api/acts/ad-mu-2-13-main-landing-gear-forward-door-emergency-cable-inspection/conflicts","importantCases":"/api/acts/ad-mu-2-13-main-landing-gear-forward-door-emergency-cable-inspection/important-cases","documents":"/api/acts/ad-mu-2-13-main-landing-gear-forward-door-emergency-cable-inspection/documents"}}