{"id":"F2006B11342","name":"AD/MU-2/14 - Engine Nacelle Upper Door Latches - Inspection","slug":"ad-mu-2-14-engine-nacelle-upper-door-latches-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":57223,"registerId":"commonwealth-F2006B11342-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/MU-2/14 - Engine Nacelle Upper Door Latches - 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-2/14 Engine Nacelle Upper Door Latches - Inspection 1/76\n\nApplicability: All models.\n\n \n\nDocument: Mitsubishi SB No. 171.\n\n \n\nCompliance: Within 100 hours time in service after 27 February 1976.\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\n \n\n \n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The text provided is a single, initial airworthiness directive that applies to all Mitsubishi MU-2 models and requires inspection within a stated time window. The document does not indicate any change from a prior scope or an amendment; it sets the scope (all models) and the action (inspection) without showing revision history or an altered scope."},"complexity_factors":["Narrow, single-action requirement (one inspection) with a single clear deadline reduces procedural complexity.","Applicability to all MU-2 models increases the stakeholder set but does not add procedural steps.","Reference to an external document (Mitsubishi SB No. 171) introduces a dependency: procedural detail is not in the AD itself, requiring users to consult the service bulletin.","Ambiguity in operational detail within the AD text (no inspection steps or remediation specified here) increases implementation reliance on the service bulletin and maintenance judgement.","Historical date and fixed compliance window (100 hours after 27 February 1976) require accurate time-in-service accounting but are straightforward to apply."],"plain_english_summary":"This AD requires operators of all Mitsubishi MU‑2 models to inspect the engine nacelle upper door latches within 100 hours time‑in‑service after 27 February 1976, using the procedure in Mitsubishi Service Bulletin No. 171. It affects MU‑2 owners, operators and maintenance organisations, imposing inspection obligations, potential repair costs and associated downtime to address any latch defects."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive from 1976 addressing a specific mechanical inspection. It has not expanded beyond its original narrow purpose of ensuring engine nacelle door latch integrity on Mitsubishi MU-2 aircraft."},"complexity_factors":["Extremely short document (under 200 words)","Only 4 substantive content lines (applicability, document reference, compliance deadline, and subject matter)","No defined terms section","No cross-references to other legislation beyond the enabling regulation (CAR 1998 Part 39)","Single, unambiguous compliance action with clear deadline","No conditional logic, exceptions, or nested provisions"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It requires owners and operators of **Mitsubishi MU-2 series aircraft** to inspect the **engine nacelle upper door latches** (the locking mechanisms on the covers that sit over the engines).\n\n**What must be done:**\n- Follow the inspection procedure outlined in **Mitsubishi Service Bulletin No. 171**\n- Complete the inspection **within 100 hours of flying time** after 27 February 1976\n\n**Who it affects:**\n- Anyone who owns or operates any model of Mitsubishi MU-2 aircraft in Australia\n\n**Why it matters:**\nAirworthiness Directives are legally binding. If you don't comply, your aircraft is not considered airworthy and cannot legally fly. This particular directive addresses a potential safety issue with engine cover latches — if these fail in flight, it could cause engine damage or debris striking the aircraft."}},"importantCases":[],"_links":{"self":"/api/acts/ad-mu-2-14-engine-nacelle-upper-door-latches-inspection","history":"/api/acts/ad-mu-2-14-engine-nacelle-upper-door-latches-inspection/history","analysis":"/api/acts/ad-mu-2-14-engine-nacelle-upper-door-latches-inspection/analysis","conflicts":"/api/acts/ad-mu-2-14-engine-nacelle-upper-door-latches-inspection/conflicts","importantCases":"/api/acts/ad-mu-2-14-engine-nacelle-upper-door-latches-inspection/important-cases","documents":"/api/acts/ad-mu-2-14-engine-nacelle-upper-door-latches-inspection/documents"}}