{"id":"F2006B02393","name":"AD/AMD 50/26 Amdt 1 - Structure","slug":"ad-amd-50-26-amdt-1-structure","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41623,"registerId":"commonwealth-F2006B02393-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AMD 50/26 Amdt 1 - Structure","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \n\nAIRWORTHINESS 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 revokes Airworthiness Directive (AD) AD/AMD 50/26 and issues the following 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\nAMD Falcon 50 and 900 Series Aeroplanes\n\nAD/AMD 50/26\n\nAmdt 1\n\n  \nStructure 7/2002\n\nApplicability: Dassault Aviation Mystere Falcon 50 Aircraft, serial numbers 253 through 278. Requirement: Action in accordance with the requirements of Dassault Aviation Service Bulletin\n\nF50-332.\n\nNote: DGAC AD 2002-033-039(B) R1 refers.\n\nCompliance: Within 6 years and 6 months after 13 June 2002.\n\nThe compliance time remains unchanged by this issue. This amendment becomes effective on 11 July 2002.\n\nBackground: The DGAC requires certain inspections to address ageing aircraft issues of fatigue, corrosion, and fretting of the aircraft structure.\n\nAmendment 1 is issued in response to a revision of the related DGAC AD which corrects an applicability serial number error.\n\nThe original issue of this Airworthiness Directive became effective on 13 June 2002.\n\n![](image.002.jpeg)  \n\nDavid Alan Villiers\n\nDelegate of the Civil Aviation Safety Authority 31 May 2002\n\n![](image.001.png)\n\nThe above AD is notified in the Commonwealth of Australia Gazette on 19 June 2002.\n\n  \n\nPage 1 of 1","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"This amendment corrects an applicability serial-number error in the original AD; it does not alter the required inspections or the compliance time. The change narrows/clarifies which aircraft serial numbers are covered, leaving the substantive inspection obligations unchanged."},"complexity_factors":["Aircraft- and serial-number specific applicability (Falcon 50, S/N 253–278) increases administrative tracking and targeting.","Requires compliance with an external manufacturer document (Dassault Service Bulletin F50‑332) rather than fully prescribing inspection steps inside the AD.","Cross-reference to a foreign authority directive (DGAC AD 2002-033-039(B) R1) creates dependency on non‑Australian regulatory material.","Technical inspections concern ageing-related mechanisms (fatigue, corrosion, fretting), which may require specialist skills, downtime and parts.","Fixed statutory compliance deadline (6 years 6 months after 13 June 2002) imposes scheduling constraints on operators.","Amendment corrects applicability serial numbers, so operators must audit fleet records to confirm affected status."],"plain_english_summary":"This Airworthiness Directive requires operators of Dassault Mystere Falcon 50 aircraft (serial numbers 253–278) to perform the structural inspections and any corrective work set out in Dassault Service Bulletin F50‑332, to be completed within 6 years and 6 months after 13 June 2002. The CASA delegate issued and enforces the requirement; aircraft owners/operators pay for inspections and repairs. The DGAC describes the inspections as addressing ageing issues: fatigue, corrosion and fretting."},"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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment does not expand the scope of the original AD. It merely corrects an administrative error in the applicability section (serial numbers) while keeping the same safety requirements, compliance timeframe, and underlying purpose (addressing ageing aircraft structural issues)."},"complexity_factors":["Single-page document with straightforward structure (Applicability, Requirement, Compliance, Background)","Only 1 defined action required (follow Service Bulletin F50-332)","Simple applicability test (serial number range 253–278)","Single compliance deadline with no conditional triggers or exceptions","No nested cross-references beyond a note referencing the French aviation authority's equivalent order (DGAC AD 2002-033-039(B) R1)","Amendment is purely corrective (fixing a serial number error) rather than substantive"],"plain_english_summary":"This CASA Airworthiness Directive replaces AD/AMD 50/26 with Amendment 1 and mandates owners/operators and maintainers of Dassault Falcon 50 jets (serials 253–278) to carry out inspections/repairs per service bulletin F50‑332 to address structural ageing risks (metal fatigue, corrosion, fretting). \n\nThe amendment corrects a paperwork error in the serial numbers only; the safety requirement and the original compliance deadline (6.5 years from 13 June 2002) remain unchanged. Non‑compliance grounds the aircraft."}},"importantCases":[],"_links":{"self":"/api/acts/ad-amd-50-26-amdt-1-structure","history":"/api/acts/ad-amd-50-26-amdt-1-structure/history","analysis":"/api/acts/ad-amd-50-26-amdt-1-structure/analysis","conflicts":"/api/acts/ad-amd-50-26-amdt-1-structure/conflicts","importantCases":"/api/acts/ad-amd-50-26-amdt-1-structure/important-cases","documents":"/api/acts/ad-amd-50-26-amdt-1-structure/documents"}}