{"id":"F2006B11339","name":"AD/MU-2/11 - Propeller Pitch Control Lever - Inspection","slug":"ad-mu-2-11-propeller-pitch-control-lever-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":57220,"registerId":"commonwealth-F2006B11339-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/MU-2/11 - Propeller Pitch Control Lever - 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-2/11 Propeller Pitch Control Lever - Inspection 11/75\n\nApplicability: All models.\n\n \n\nDocument: 1. Mitsubishi SB No. 168; or\n\n \n\n2. Japan Civil Aviation Bureau AD No. TCD-1188-75. Compliance: Within 25 hours time in service after 13 November 1975.\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":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive from 1975. It has not expanded beyond its original narrow purpose of requiring a specific inspection on a specific aircraft type."},"complexity_factors":["Extremely short document (approximately 150 words)","Only 2 defined references (Mitsubishi SB No. 168 and JCAB AD No. TCD-1188-75)","Single, unambiguous compliance requirement (inspection within 25 hours)","No nested exceptions, conditional logic, or cross-references to other legislation","Clear applicability statement ('All models')","Fixed deadline with simple calculation (25 hours time in service after specified date)"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations 1998.\n\n**What it does:** It requires owners and operators of **Mitsubishi MU-2 series aeroplanes** to inspect the **propeller pitch control lever** (the cockpit control that adjusts the angle of the propeller blades, affecting thrust and engine performance).\n\n**Who must comply:** Anyone operating any model of Mitsubishi MU-2 aircraft in Australia.\n\n**What must be done:** The inspection must follow either:\n- **Mitsubishi Service Bulletin No. 168** (technical instructions from the manufacturer), OR\n- **Japan Civil Aviation Bureau AD No. TCD-1188-75** (the equivalent Japanese safety order)\n\n**When:** Within **25 hours of flight time** after **13 November 1975**.\n\n**Why it matters:** Propeller pitch control is critical for safe flight. A malfunction could cause loss of engine power or control. This AD ensures a known defect is caught before it causes an accident."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument as presented applies to all Mitsubishi MU-2 models and mandates a one-off inspection within a specified short window, with technical procedure to follow set out in the referenced documents. The directive itself does not indicate any expansion or narrowing of scope from an earlier instrument; it states its applicability explicitly (Applicability: All models.) and prescribes the compliance action and timeframe (Document; Compliance)."},"complexity_factors":["Single, narrowly defined required action (inspection of propeller pitch control lever) reduces complexity.","Short, explicit compliance window (25 hours after 13 November 1975) creates a clear time constraint but little procedural ambiguity.","Applicability is broad within the model line (“All models”), which increases the number of affected operators but not legal complexity.","Technical execution is delegated to external documents (Mitsubishi SB No.168 or JCAB AD No. TCD-1188-75), requiring operators to obtain and follow those sources—this cross-reference adds implementation friction.","Minimal text and absence of multiple conditional requirements keeps statutory interpretation straightforward.","Placement in Part 39 (Airworthiness Directives) ties the mandate to the regulator’s enforcement framework but does not add procedural options or exemptions within the instrument itself."],"plain_english_summary":"This directive requires all Mitsubishi MU-2 owners/operators to inspect the propeller pitch control lever, following either Mitsubishi Service Bulletin No.168 or JCAB AD TCD‑1188‑75, within 25 flight hours after 13 November 1975.  \n\nIssued under the Civil Aviation Regulations (Part 39), it creates a short, mandatory compliance window that drives immediate scheduling, inspection costs, and any corrective work if defects are found."}},"importantCases":[],"_links":{"self":"/api/acts/ad-mu-2-11-propeller-pitch-control-lever-inspection","history":"/api/acts/ad-mu-2-11-propeller-pitch-control-lever-inspection/history","analysis":"/api/acts/ad-mu-2-11-propeller-pitch-control-lever-inspection/analysis","conflicts":"/api/acts/ad-mu-2-11-propeller-pitch-control-lever-inspection/conflicts","importantCases":"/api/acts/ad-mu-2-11-propeller-pitch-control-lever-inspection/important-cases","documents":"/api/acts/ad-mu-2-11-propeller-pitch-control-lever-inspection/documents"}}