{"id":"F2006B03663","name":"AD/BEECH 1900/44 - Landing Gear Circuit Breaker","slug":"ad-beech-1900-44-landing-gear-circuit-breaker","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43253,"registerId":"commonwealth-F2006B03663-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.001.png)\n\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 CASR 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.\n\n![](image.001.png)  \n\nBeechcraft 1900 Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/BEECH 1900/44 Landing Gear Circuit Br","sectionType":"part","heading":"AD/BEECH 1900/44 Landing Gear Circuit Breaker 8/2004","content":"# AD/BEECH 1900/44 Landing Gear Circuit Breaker 8/2004\n\nApplicability: Model 1900C aeroplanes, serial numbers UB-1 through UB-35 inclusive. Requirement: Unless already accomplished, incorporate Kit No. 114-3036-1, which replaces the\n\n200-amp landing gear electrical power current limiter with a 60-amp circuit breaker, in accordance with the procedures in Raytheon Mandatory Service Bulletin SB 24- 2616, Rev. 1, Revised: April, 2002.\n\nNote: FAA AD 2004-09-30 Amdt 39-13620 refers.\n\nCompliance: Within the next 600 hours time-in-service (TIS) after the effective date of this Directive.\n\nThis Airworthiness Directive becomes effective on 5 August 2004.\n\nBackground: This Directive requires the replacement of the 200-amp electrical power current limiter in the landing gear with a 60-amp electrical power circuit breaker. This is the result of reports received by the United States Federal Aviation Administration about the inability to automatically lower the landing gear and the inability to operate other related electrical systems.\n\nThe Directive is issued to prevent heat damage to the electrical wiring in and around the landing gear electrical systems components, which could result in the inability to operate critical control systems.\n\n![](image.002.png)  \n\nJames Coyne\n\nDelegate of the Civil Aviation Safety Authority 23 June 2004\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 14 July 2004.","sortOrder":1}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow Airworthiness Directive addressing a specific unsafe condition in a specific aircraft type. It has not expanded beyond its original safety purpose."},"complexity_factors":["Single, specific applicability (one aircraft model, 35 serial numbers)","Single mandatory action with clear reference to external technical document (Service Bulletin)","Simple compliance timeframe (600 hours time-in-service)","No conditional logic, exceptions, or alternative compliance methods","No defined terms section","Short document (approximately 200 words of substantive content)"],"plain_english_summary":"This Airworthiness Directive orders owners/operators of 35 Beechcraft 1900C (serials UB‑1 to UB‑35) to replace a 200‑amp landing‑gear current limiter with a 60‑amp circuit breaker using Kit No. 114‑3036‑1 and SB 24‑2616. It responds to reports of overheating that can damage electrical systems and prevent gear extension, reducing fire and gear‑failure risk. Compliance is required within 600 flight hours from 5 August 2004."},"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":"Scope remains consistent with the stated objective: it targets specific serial‑numbered 1900C aircraft and mandates kit installation within 600 flight hours to prevent heat damage and loss of landing‑gear/electrical function. No widening or narrowing of applicability or action is indicated in the text provided."},"complexity_factors":["Narrow applicability: limited to Model 1900C, serial UB‑1 through UB‑35 (reduces operational complexity).","Single, discrete technical action: replacement of a 200‑amp limiter with a 60‑amp circuit breaker (mechanically simple to specify).","Reliance on manufacturer's procedures: mandates compliance with Raytheon Mandatory Service Bulletin SB 24‑2616 Rev.1 (dependency on external technical instructions).","Fixed compliance window: 600 hours TIS creates scheduling and operational planning requirements for operators.","Cost and downtime borne by operators: parts, labour and aircraft out‑of‑service time are private costs to comply.","Cross-reference to FAA AD 2004‑09‑30 (administrative linkage to overseas regulatory action).","Limited regulatory discretion in execution: directive prescribes kit and service bulletin, leaving little room for alternative methods without further approval."],"plain_english_summary":"This Airworthiness Directive requires owners/operators of Beechcraft 1900C aeroplanes (serial numbers UB‑1 to UB‑35) to replace the 200‑amp landing‑gear electrical current limiter with a 60‑amp circuit breaker using Raytheon Kit No. 114‑3036‑1 per Mandatory Service Bulletin SB 24‑2616 Rev.1, within 600 flight hours. CASA states the change aims to prevent heat damage and loss of landing‑gear and related electrical functions; operators bear the cost, labour and downtime to schedule and fit the kit to comply."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-1900-44-landing-gear-circuit-breaker","history":"/api/acts/ad-beech-1900-44-landing-gear-circuit-breaker/history","analysis":"/api/acts/ad-beech-1900-44-landing-gear-circuit-breaker/analysis","conflicts":"/api/acts/ad-beech-1900-44-landing-gear-circuit-breaker/conflicts","importantCases":"/api/acts/ad-beech-1900-44-landing-gear-circuit-breaker/important-cases","documents":"/api/acts/ad-beech-1900-44-landing-gear-circuit-breaker/documents"}}