{"id":"F2006B03922","name":"AD/BEECH 400/2 - MLG Door Uplock Links","slug":"ad-beech-400-2-mlg-door-uplock-links","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43531,"registerId":"commonwealth-F2006B03922-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 400/2 - MLG Door Uplock Links","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nBeechcraft 400 Series Aeroplanes\n\nAD/BEECH 400/2 MLG Door Uplock Links 4/93\n\nApplicability: Model 400A series with serial numbers RK-1 through RK-32. Model 400T series with serial numbers TT-1 through TT-6.\n\nRequirement: Replace the existing link assembly from the uplock mechanism of the main landing gear door with an improved link assembly, in accordance with Beechcraft Service Bulletin 2447.\n\nNote: FAA AD 93-01-07 Amdt 39-8461 refers.\n\nCompliance: Within 100 hours time in service after 1 April 1993.\n\nBackground: An investigation conducted by the manufacturer has revealed that the uplock links installed on certain aircraft were undersized. The actions specified by this Directive are intended to prevent snagging of the end clevis fitting and kinking (and subsequent failure) of the emergency release cable of the main landing gear.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific mechanical defect in specific aircraft. It has not expanded beyond its original purpose of mandating a parts replacement to prevent landing gear failure."},"complexity_factors":["Very short document (approximately 150 words)","Only 2 defined applicability criteria (specific serial number ranges)","Single, unambiguous compliance action (replace part per service bulletin)","Clear deadline (100 hours time in service after fixed date)","No nested exceptions, conditional logic, or cross-references to other legislation beyond a single reference to an FAA AD for information","Plain language background explanation included"],"plain_english_summary":"This is an **Airworthiness Directive** — essentially a mandatory safety order for aircraft owners and operators.\n\n**What it does:**\nOrders the replacement of a specific mechanical part (the \"uplink link assembly\") on the main landing gear doors of certain Beechcraft 400 series aeroplanes.\n\n**Who it affects:**\nOwners and operators of:\n- Beechcraft Model 400A aircraft with serial numbers RK-1 through RK-32\n- Beechcraft Model 400T aircraft with serial numbers TT-1 through TT-6\n\n**Why it matters:**\nThe original uplock links were found to be **undersized** (too small/weak for their purpose). If not replaced, the part could snag, causing the emergency release cable to kink and potentially fail. This could prevent the main landing gear from deploying properly in an emergency — a serious safety risk.\n\n**What must be done:**\nReplace the faulty link with an improved version following Beechcraft Service Bulletin 2447. This must be completed within 100 hours of flight time after 1 April 1993.\n\n**Key point:** This is not optional. Airworthiness Directives are legally binding safety requirements. Non-compliance means the aircraft cannot legally fly."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument prescribes a targeted replacement for specified serial numbers and sets a compliance time. The source does not indicate any change in scope from an earlier instrument or varying applicability; no scope change is documented in the text provided."},"complexity_factors":["Narrow applicability limited to two specific model/serial-number groups (Applicability)","Single, discrete corrective action: replace the link assembly (Requirement)","Requires conforming to a manufacturer service bulletin for technical detail (Requirement)","Short, fixed compliance window measured in flight hours (Compliance)","Cross-reference to a related FAA AD but no additional procedural layers (Note)"],"plain_english_summary":"The Civil Aviation Safety Authority requires owners/operators of Beechcraft 400A (serials RK‑1–RK‑32) and 400T (TT‑1–TT‑6) to replace the main landing gear door uplock link assembly with the improved part per Beechcraft Service Bulletin 2447. The change, to be done within 100 hours TIS after 1 April 1993, addresses undersized links that can snag or kink the emergency release cable and risk gear failure."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-400-2-mlg-door-uplock-links","history":"/api/acts/ad-beech-400-2-mlg-door-uplock-links/history","analysis":"/api/acts/ad-beech-400-2-mlg-door-uplock-links/analysis","conflicts":"/api/acts/ad-beech-400-2-mlg-door-uplock-links/conflicts","importantCases":"/api/acts/ad-beech-400-2-mlg-door-uplock-links/important-cases","documents":"/api/acts/ad-beech-400-2-mlg-door-uplock-links/documents"}}