{"id":"F2006B09828","name":"AD/F406/3 - NLG Steering Cable and Air Conditioning Relay","slug":"ad-f406-3-nlg-steering-cable-and-air-conditioning-relay","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":54848,"registerId":"commonwealth-F2006B09828-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/F406/3 NLG Steering Cable and Air Con","sectionType":"part","heading":"AD/F406/3 NLG Steering Cable and Air Conditioning Relay 7/2000","content":"# AD/F406/3 NLG Steering Cable and Air Conditioning Relay 7/2000\n\nDM\n\nApplicability: Serial numbers F406-0001 to F406-0086\n\nRequirement: Action in accordance with Reims/Cessna SB CAB00-6 dated 17 April 2000.\n\nNote: DGAC AD 2000-177(A) refers.\n\nCompliance: 1. Inspect within 10 hours time in service after the effective date of this directive; and\n\n2. Where no damage is found modify within the 100 hours time in service after the effective date of this directive, or by 31 December 2000, whichever occurs first.\n\nThis Airworthiness Directive becomes effective on 24 May 2000\n\nBackground: NLG steering cables have been found damaged by electrical arcing between a relay and the NLG cable. Such arcing is an unsafe condition may cause failure of the NLG steering system.\n\n![](image.003.png)  \n\nWilliam Ronald Smith\n\nDelegate of the Civil Aviation Safety Authority 15 May 2000\n\n![](image.002.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 24 May 2000.","sortOrder":1}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"No. The AD enforces remedial action limited to serial numbers F406-0001 to F406-0086 and requires inspection and modification per Reims/Cessna SB CAB00-6 to address the stated unsafe condition (Background; Applicability; Requirement; Compliance). It does not broaden applicability or add further measures beyond those set out in the directive."},"complexity_factors":["Narrow applicability: applies only to F406 serial numbers F406-0001 to F406-0086 (Applicability).","Clear, short compliance windows: inspection within 10 flight hours; modification within 100 flight hours or by 31 Dec 2000 (Compliance).","Prescriptive action referenced to an external service bulletin: modification to be done in accordance with Reims/Cessna SB CAB00-6 dated 17 April 2000 (Requirement).","Single, well-defined unsafe condition: electrical arcing between an air-conditioning relay and the NLG steering cable (Background).","Legal basis and delegated decision: issued by CASA delegate under CAR 1998 subreg 39.1(1) (preamble), which concentrates discretion at the delegate level."],"plain_english_summary":"This AD requires operators of Reims/Cessna F406 aircraft serials F406‑0001 to F406‑0086 to inspect the nose-landing-gear (NLG) steering cable within 10 flight hours and to modify it per Reims/Cessna Service Bulletin CAB00‑6 within 100 flight hours or by 31 December 2000. CASA issued the directive to correct electrical arcing from an air‑conditioning relay that can damage the NLG steering cable. The CASA delegate set the requirement (CAR 1998 subreg 39.1(1)); aircraft owners/operators must arrange and pay for the inspection and modification."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — addressing a specific unsafe condition in a limited serial number range of Cessna F406 aircraft. There is no evidence of scope creep; it remains tightly focused on the electrical arcing issue with the NLG steering cable."},"complexity_factors":["Very short document (under 300 words)","Only 4 defined elements: applicability (serial number range), requirement (single service bulletin reference), compliance (two simple time-based conditions), and effective date","No cross-references to other legislation beyond a single note referencing a French aviation authority directive (DGAC AD 2000-177(A))","Simple conditional logic: only one 'if/then' scenario (where no damage is found)","Single regulatory mechanism: subregulation 39.1(1) of CAR 1998","No nested exceptions or layered definitions"],"plain_english_summary":"This AD requires owners/operators of specific Cessna F406s (S/N F406‑0001 to F406‑0086) to inspect the nose‑wheel steering cables within 10 flight hours and, if undamaged, complete a modification per Reims/Cessna Service Bulletin CAB00‑6 within 100 hours (or by 31 Dec 2000). It addresses electrical arcing that can damage steering cables and prevent nose‑wheel steering during taxi/landing, posing a serious safety risk."},"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"}},"importantCases":[],"_links":{"self":"/api/acts/ad-f406-3-nlg-steering-cable-and-air-conditioning-relay","history":"/api/acts/ad-f406-3-nlg-steering-cable-and-air-conditioning-relay/history","analysis":"/api/acts/ad-f406-3-nlg-steering-cable-and-air-conditioning-relay/analysis","conflicts":"/api/acts/ad-f406-3-nlg-steering-cable-and-air-conditioning-relay/conflicts","importantCases":"/api/acts/ad-f406-3-nlg-steering-cable-and-air-conditioning-relay/important-cases","documents":"/api/acts/ad-f406-3-nlg-steering-cable-and-air-conditioning-relay/documents"}}