{"id":"F2006B03920","name":"AD/BEECH 400/18 - Wing Temperature Thermal Switch","slug":"ad-beech-400-18-wing-temperature-thermal-switch","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43529,"registerId":"commonwealth-F2006B03920-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.002.png)\n\n![](image.002.png)  \nFor the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.","sortOrder":0},{"sectionNumber":"AD/BEECH 400/18 Wing Temperature Thermal","sectionType":"part","heading":"AD/BEECH 400/18 Wing Temperature Thermal Switch 7/2000","content":"# AD/BEECH 400/18 Wing Temperature Thermal Switch 7/2000\n\nApplicability: Model 400A series aeroplanes, serial numbers (S/N) RK-01 through RK-188 inclusive; Model 400T (T-1A) series aeroplanes, S/N TT-01 through TT-180 inclusive; and Model 400T (TX) series aeroplane S/N TX-01 through TX-09 inclusive.\n\nRequirement: 1. Replace the temperature switch assemblies of the wing ice protection system with new, improved switch assemblies in accordance with Raytheon Service Bulletin (SB) 30-3008 Revision 1, dated August 1999.\n\nReplacements accomplished in accordance with Raytheon SB 30-3008, dated March 1999, prior to the effective date of this Directive are considered acceptable for compliance with this Directive.\n\n2. Switch assemblies having one of the following part numbers may not be fitted to any aircraft:\n\n| 45AS63026-3  | 128-362038-1 | 128-361041-11 |\n| ------------ | ------------ | ------------- |\n| 45AS63026-5  | 128-361038-3 | 128-361042-3  |\n| 45AS63026-11 | 128-361041-3 | 128-361042-5  |\n| 128-361037-1 | 128-361041-5 | 128-361042-9  |\n| 128-361037-3 | 128-361041-9 | 128-361042-11 |\n\nNote: FAA AD 2000-09-12 Amdt 39-11721 refers.\n\nCompliance: For Requirement 1 \\- At the next scheduled maintenance inspection, but no later than 200 hours time in service after the effective date of this Directive.\n\nFor Requirement 2 - As of the effective date of this Directive. This Airworthiness Directive becomes effective on 13 July 2000.","sortOrder":1}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD remains focused on correcting the unsafe condition for the named Model 400/400T serial numbers by requiring replacement of switch assemblies and banning specified part numbers. It accepts prior replacements performed under Raytheon SB dated March 1999. The instrument does not expand beyond its corrective purpose or broaden applicability within the text provided (Applicability; Requirement 1; Requirement 2; Compliance)."},"complexity_factors":["Narrow, serial-numbered applicability (Applicability) — precise fleet targeting reduces policy breadth but increases checking burden for operators.","Dependence on external technical document (Raytheon SB 30-3008 Revision 1) for implementation details (Requirement 1).","Dual-action structure: mandatory replacement and an immediate prohibition on specified part numbers (Requirement 1 & Requirement 2).","Compliance timing constraints: 'next scheduled maintenance but no later than 200 hours' for replacements, and immediate effect for the parts ban (Compliance).","Acceptance of an earlier service bulletin (Raytheon SB dated March 1999) for compliance creates a conditional compliance pathway (Requirement 1).","Explicit parts list of banned PN's increases administrative tracking and procurement controls for maintenance organisations (Requirement 2)."],"plain_english_summary":"Mandates replacement of wing-temperature thermal switches on specified Beechcraft Model 400/400T aeroplanes with improved assemblies per Raytheon Service Bulletin 30‑3008, and bans installation of a listed set of older switch part numbers. Affects owners/operators of the serial‑numbered aircraft; replacements are required at the next scheduled maintenance or within 200 flight hours. The directive seeks to correct an identified unsafe condition and shifts costs and scheduling burden to operators while relying on the manufacturer's service bulletin for technical instructions."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This Airworthiness Directive maintains its original narrow scope: addressing a specific unsafe condition in specific aircraft models through a mandated component replacement. There is no evidence of scope creep; it remains a targeted safety intervention for the wing ice protection system."},"complexity_factors":["Single, specific technical requirement (replace one component type)","Clear applicability section limited to specific aircraft serial numbers","Simple two-part requirement structure with explicit part number prohibitions","Straightforward compliance timeline (next maintenance or 200 hours)","No nested definitions, cross-references to other legislation, or conditional exceptions beyond the grandfathering clause for prior repairs","Total length: approximately 300 words"],"plain_english_summary":"This CASA safety order requires owners/operators of specified Beechcraft Model 400A and 400T aircraft (serial RK‑01–RK‑188, TT‑01–TT‑180, TX‑01–TX‑09) to replace unreliable wing ice‑protection temperature switches with improved units and immediately bans 15 unsafe part numbers.  \n\nReplacement must occur at the next maintenance check or within 200 flight hours after 13 July 2000; aircraft already modified per the March 1999 manufacturer bulletin are compliant."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-400-18-wing-temperature-thermal-switch","history":"/api/acts/ad-beech-400-18-wing-temperature-thermal-switch/history","analysis":"/api/acts/ad-beech-400-18-wing-temperature-thermal-switch/analysis","conflicts":"/api/acts/ad-beech-400-18-wing-temperature-thermal-switch/conflicts","importantCases":"/api/acts/ad-beech-400-18-wing-temperature-thermal-switch/important-cases","documents":"/api/acts/ad-beech-400-18-wing-temperature-thermal-switch/documents"}}