{"id":"F2006B09831","name":"AD/F406/7 - Nose Landing Gear Actuator Attach Structure","slug":"ad-f406-7-nose-landing-gear-actuator-attach-structure","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":54856,"registerId":"commonwealth-F2006B09831-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.001.png)\n\n![](image.001.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.\n\nReims Aviation F406 Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/F406/7 Nose Landing Gear Actuator Att","sectionType":"part","heading":"AD/F406/7 Nose Landing Gear Actuator Attach Structure 11/2001","content":"# AD/F406/7 Nose Landing Gear Actuator Attach Structure 11/2001\n\nDM\n\nApplicability: Model F406 aircraft, serial numbers F406-0001 through F406-0089. Requirement: Inspect in accordance with Reims Aviation Service Bulletin CAB 00-10, dated 21\n\nAugust 2000.\n\nIf cracks are found, before further flight, install Service Kit SKRA406-010.\n\nNote: DGAC AD 2000-379(A) refers.\n\nCompliance: For aircraft that have accumulated more than 7,000 hours total time in service or 5,000 total landings, accomplish before further flight after 3 October 2001 unless the initial inspection is already accomplished. If no cracks are found, re-inspect at intervals not to exceed 100 hours time in service until installation of Service Kit SKRA406-010.\n\nFor aircraft that have accumulated less than 5,000 total landings, accomplish within 200 hours time in service or 12 months after 26 September 2001, whichever occurs first. Thereafter inspect at intervals not to exceed 200 hours time in service or 12 months, whichever occurs first, until installation of Service Kit SKRA406-010.\n\nThis Airworthiness Directive becomes effective on 26 September 2001.\n\nBackground: Reports were received of fatigue cracking in the nose landing gear actuator attach structure. The cracking was found on aircraft with more than 7,000 hours of operation or 5,000 landings.\n\n![](image.002.png)  \n\nDavid Alan Villiers\n\nDelegate of the Civil Aviation Safety Authority 19 September 20001\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 26 September 2001.","sortOrder":1}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, targeted airworthiness directive addressing a specific safety-of-flight issue (fatigue cracking in a particular structural component). The scope remains precisely limited to the identified unsafe condition in the specified aircraft population, with no evidence of scope creep or expansion beyond the original safety purpose."},"complexity_factors":["Single, clearly defined applicability (one aircraft model, specific serial number range)","Straightforward two-path compliance structure based on simple flight hours/landing count thresholds","Single primary action (visual inspection per referenced service bulletin) with one conditional follow-up (repair kit installation if cracks found)","No defined terms section, no cross-references to other legislation beyond a single note referencing the French aviation authority's equivalent directive","Temporal compliance requirements use basic 'whichever occurs first' logic without nested conditions","Total length: approximately 300 words of operative text"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspections of the nose landing‑gear actuator attach structure on Reims Aviation F406 aeroplanes (serials F406‑0001 to F406‑0089) to detect fatigue cracks. If cracks are found the specified Service Kit (SKRA406‑010) must be installed before further flight; if none are found, recurring inspections are required until kit installation. Timing depends on aircraft use; the action prevents nose‑gear failure that could cause loss of control or injury."},"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":5,"scope_assessment":{"changed":false,"description":"The AD's measures (inspections, intervals, and compulsory installation of Service Kit SKRA406-010 if cracks are found) align with the stated background purpose to address fatigue cracking in the nose landing gear actuator attach structure. The applicability, actions and timelines in the text implement that corrective focus without expanding to other parts or aircraft types."},"complexity_factors":["Applicability limited to a serial-number range (Model F406, serial numbers F406-0001 through F406-0089) — increases tracking and applicability checks.","Requirement to follow an external document (Reims Aviation Service Bulletin CAB 00-10, dated 21 August 2000) rather than full procedures in the AD itself — creates dependency on another document.","Conditional immediate action for higher-usage aircraft (>7,000 hours or 5,000 landings) with a \"before further flight after 3 October 2001\" requirement (Compliance paragraph) — a strict ground/flight restriction if criteria met.","Different compliance windows for lower-usage aircraft (within 200 hours TIS or 12 months after 26 September 2001) — two parallel timing regimes based on usage.","Different recurrent inspection intervals depending on usage (100 hours TIS for higher-use until kit installed; 200 hours or 12 months for lower-use until kit installed) — multiple recurring schedules to manage.","Mandatory corrective action if cracks are found: install Service Kit SKRA406-010 before further flight — immediate remediation requirement affecting parts supply and labour.","Cross-reference to another authority's AD (DGAC AD 2000-379(A)) — indicates parallel foreign regulatory material to consider.","Multiple metrics in play (total hours, total landings, hours-in-service, calendar months) — creates administrative and recordkeeping complexity.","Legal basis cited under CAR 1998 subregulation 39.1(1) — links to statutory enforcement framework and delegated decision-making.","Effective date and published notification (becomes effective 26 September 2001; notified in Gazette) — imposes binding timing and public-notice considerations."],"plain_english_summary":"This Airworthiness Directive requires operators of Reims Aviation F406 aircraft (serial nos F406-0001 to F406-0089) to inspect the nose landing gear actuator attach structure using Reims Service Bulletin CAB 00-10 and to fit Service Kit SKRA406-010 before further flight if cracks are found. It sets different initial and recurrent inspection deadlines tied to total hours, landings and calendar time, and ceases the repeat inspections once the service kit is installed."}},"importantCases":[],"_links":{"self":"/api/acts/ad-f406-7-nose-landing-gear-actuator-attach-structure","history":"/api/acts/ad-f406-7-nose-landing-gear-actuator-attach-structure/history","analysis":"/api/acts/ad-f406-7-nose-landing-gear-actuator-attach-structure/analysis","conflicts":"/api/acts/ad-f406-7-nose-landing-gear-actuator-attach-structure/conflicts","importantCases":"/api/acts/ad-f406-7-nose-landing-gear-actuator-attach-structure/important-cases","documents":"/api/acts/ad-f406-7-nose-landing-gear-actuator-attach-structure/documents"}}