{"id":"F2006B04236","name":"AD/BEECH 90/46 - Rudder Cable - Electrical Panel Clearance","slug":"ad-beech-90-46-rudder-cable-electrical-panel-clearance","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43999,"registerId":"commonwealth-F2006B04236-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 90/46 - Rudder Cable - Electrical Panel Clearance","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)  Beechcraft 90 and 65-90 (King Air) Series Aeroplanes\n\n \n\nAD/BEECH 90/46 Rudder Cable - Electrical Panel Clearance 5/77\n\nApplicability: Model C90 S/Nos. LJ-640 to LJ-716. Model E90 S/No. LW-120 to LW-220, LW- 223.\n\n \n\nDocument:  Beechcraft SI 0896. Compliance: Forthwith.\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":3,"scope_assessment":{"changed":false,"description":"The AD, as presented, establishes a mandatory action for specified Beechcraft serial numbers and points to Beechcraft SI 0896 for the technical steps, with immediate compliance required. The text contains no indication that it alters or expands an earlier stated scope; it defines applicability and requires prompt compliance without showing any change from a prior instrument in the provided text."},"complexity_factors":["Directive is short and narrowly targeted (title + applicability + reference) rather than containing technical steps.","Mandatory immediate compliance ('Forthwith') increases operational urgency despite limited on-page detail.","Technical requirements are outsourced to an external document (Beechcraft SI 0896), requiring consultation of that SI to determine actual tasks, parts and labour.","Applicability is stated by precise serial-number ranges, requiring operators to check serial records to determine whether an aircraft is affected.","Lack of on-face information about inspection scope, tolerances, time/cost estimates or alternative compliance options increases administrative and implementation uncertainty."],"plain_english_summary":"### What this instrument does (mechanically)\n\nThis Airworthiness Directive (AD) requires operators of certain Beechcraft aeroplanes to carry out the action set out in Beechcraft Service Instruction (SI) 0896. The AD is titled “Rudder Cable - Electrical Panel Clearance,” and it directs compliance \"forthwith.\" (Title; Document: Beechcraft SI 0896; Compliance: Forthwith.)\n\n### Who is affected\n\n- Owners and operators of Beechcraft Model C90 with serial numbers LJ-640 to LJ-716, and Model E90 with serial numbers LW-120 to LW-220 and LW-223. (Applicability.)\n- Maintenance organisations and technicians who perform inspections or corrective work on those aeroplanes, because they must follow the referenced Beechcraft SI.\n\n### Why it matters (official claim, and what that implies)\n\n- The AD’s title identifies a concern about the clearance between a rudder cable and an electrical panel. That is the stated focus of the required action (Title). The AD therefore directs a specific inspection or modification described in SI 0896 to address that matter (Document: Beechcraft SI 0896).\n\n- The directive is mandatory and immediate: it requires compliance \"forthwith,\" which means affected aircraft must be inspected or modified without delay (Compliance: Forthwith). \n\n### Who pays and who decides\n\n- The owner/operator of each affected aeroplane bears the direct cost: time for inspection, any parts and labour for whatever corrective action SI 0896 prescribes, and any aircraft downtime while the work is done (Applicability; Document; Compliance).\n- The Civil Aviation Safety Authority issues the AD; the specific technical steps and standards to be followed are set out in the referenced Beechcraft Service Instruction (Document: Beechcraft SI 0896). Maintenance providers carry out the work according to that instruction.\n\n### Compliance burden, discretion and implementation risk\n\n- Burden: The AD does not list the technical steps or time/cost estimates — it refers operators to Beechcraft SI 0896 for the required work (Document: Beechcraft SI 0896). Therefore the actual time, complexity and cost depend on the SI’s content.\n- Discretion: The AD makes compliance mandatory and immediate; there is no text in the AD giving operators discretion to defer or substitute other measures (Compliance: Forthwith). Any discretionary choices (methods, parts suppliers, scheduling) will be constrained by the SI and by regulatory acceptance of alternative methods, if any.\n- Implementation risk: Unknown from this AD alone. The AD does not state whether the required action is a simple inspection, an adjustment, or a part replacement; those details are in SI 0896 (Document: Beechcraft SI 0896). Potential operational impacts include aircraft downtime and maintenance resource allocation.\n\n### Effects on private activity and markets (mechanical description)\n\n- Maintenance workload will shift to aircraft operators and maintenance organisations for the affected serial-numbered aircraft. This may generate additional demand for parts and labour for those providers.\n- The AD applies to a limited set of serial numbers; the benefits of complying (remedying the clearance issue named in the title) are concentrated on those aircraft, while costs (inspection/repair) are borne by their operators. The AD itself does not set fees or subsidies.\n\n### Source-grounded summary of trade-offs\n\n- The AD imposes an immediate mandatory action (Compliance: Forthwith) that transfers time, parts and labour costs to the operators of specified aircraft (Applicability). The technical scope and therefore the magnitude of those costs are left to the referenced Beechcraft Service Instruction (Document: Beechcraft SI 0896). The AD leaves little room for operational delay, which creates an opportunity cost in scheduling maintenance or flights (Compliance: Forthwith)."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive issued in 1977 (as indicated by '5/77'). It addresses a specific technical defect in specific aircraft serial numbers. There is no indication of scope creep; it remains precisely limited to the original safety issue."},"complexity_factors":["Extremely short document (under 150 words)","Only 3 defined elements: applicability (specific serial numbers), reference document (Beechcraft SI 0896), and compliance deadline ('forthwith')","No cross-references to other legislation or regulations beyond the enabling authority (Civil Aviation Regulations 1998, Part 39)","No conditional logic or exceptions — straightforward mandatory compliance","Single operational requirement: comply with referenced service instruction immediately"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It requires specific Beechcraft King Air aeroplanes to fix a safety issue with **rudder cable clearance near the electrical panel**.\n\n**What it does:**\n- Orders owners/operators of certain Beechcraft 90 series aircraft (specific serial numbers) to comply with Beechcraft Service Instruction 0896 \"forthwith\" (immediately, without delay).\n- The issue involves ensuring adequate clearance between rudder cables and the electrical panel — presumably to prevent cable chafing, electrical interference, or control system failure.\n\n**Who it affects:**\n- Owners and operators of:\n  - Beechcraft Model C90 with serial numbers LJ-640 through LJ-716\n  - Beechcraft Model E90 with serial numbers LW-120 through LW-220, plus LW-223\n\n**Why it matters:**\n- Rudder cables are critical flight controls. If they interfere with electrical components, it could lead to:\n  - Loss of rudder control\n  - Electrical system failure\n  - Potential catastrophic accident\n- \"Forthwith\" compliance means this is urgent — no grace period.\n\nThis is a **safety-critical maintenance order**, not a law that creates new offences, but non-compliance grounds for grounding the aircraft."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-90-46-rudder-cable-electrical-panel-clearance","history":"/api/acts/ad-beech-90-46-rudder-cable-electrical-panel-clearance/history","analysis":"/api/acts/ad-beech-90-46-rudder-cable-electrical-panel-clearance/analysis","conflicts":"/api/acts/ad-beech-90-46-rudder-cable-electrical-panel-clearance/conflicts","importantCases":"/api/acts/ad-beech-90-46-rudder-cable-electrical-panel-clearance/important-cases","documents":"/api/acts/ad-beech-90-46-rudder-cable-electrical-panel-clearance/documents"}}