{"id":"F2006B08907","name":"AD/DH 83/3 - Cockpit Lateral Tie Rods and Aircraft Structure","slug":"ad-dh-83-3-cockpit-lateral-tie-rods-and-aircraft-structure","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52434,"registerId":"commonwealth-F2006B08907-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\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\nDe Havilland DH 83 (Fox Moth) Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/DH 83/3 Cockpit Lateral Tie Rods and ","sectionType":"part","heading":"AD/DH 83/3 Cockpit Lateral Tie Rods and Aircraft Structure 12/2003","content":"# AD/DH 83/3 Cockpit Lateral Tie Rods and Aircraft Structure 12/2003\n\nApplicability: All DH 83 series aircraft.\n\nRequirement: 1. Action in accordance with the Paragraph 2.A and 2.C of the Accomplishment Instructions of British Aerospace Technical News Sheet (TNS) CT (Moth) No. 29 Issue 3.\n\n2. Inspect in accordance with Paragraph 2.B of the Accomplishment Instructions of British Aerospace TNS CT (Moth) No. 29 Issue 3.\n\nNote: UK CAA AD 006-10-97 refers.\n\nCompliance: 1. Within 2,000 flying hours or 18 years from the last tie rod renewal, whichever occurs first. In cases where no evidence of last renewal date is found to exist, accomplish within 100 flying hours after 27 November 2003 or before 27 January 2004, whichever occurs first. Thereafter at intervals not to exceed 2,000 flying hours or 18 years, whichever occurs first.\n\n2. Within 2 calendar months after 27 November 2003, unless the initial inspection is already accomplished, and thereafter at intervals not to exceed 12 calendar months; and, before further flight after a heavy landing or undercarriage trauma occurrence (as defined in TNS CT (Moth) No. 29 Issue 3).\n\nThis Airworthiness Directive becomes effective on 27 November 2003.","sortOrder":1}],"analysis":{"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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard single-issue Airworthiness Directive targeting a specific unsafe condition in a specific aircraft type. It has not expanded beyond its original purpose of addressing cockpit structural integrity in DH 83 aircraft."},"complexity_factors":["Single aircraft type applicability (DH 83 series only)","References external technical document (British Aerospace TNS CT (Moth) No. 29 Issue 3) without reproducing its contents","Simple conditional logic: two alternative compliance paths depending on whether renewal history is known","Only 4 defined temporal triggers (flying hours, calendar years, calendar months, specific dates)","No nested exceptions or cross-references to other legislation beyond a single note referencing UK CAA AD 006-10-97"],"plain_english_summary":"CASA has issued a mandatory safety order for all De Havilland DH.83 \"Fox Moth\" aircraft requiring structural reinforcement of cockpit lateral tie rods and ongoing inspections to prevent possible cockpit collapse or in‑flight airframe failure. \n\nIt affects every owner/operator of DH.83s; repairs must be done per British Aerospace instructions within 2,000 flight hours (or 18 years) or sooner if unknown, with annual inspections starting two months after November 2003 and immediate checks after hard landings."},"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":false,"description":"The AD applies to all DH 83 series aircraft and mandates actions/inspections per TNS CT (Moth) No. 29 Issue 3. The text does not indicate any expansion or narrowing of applicability from an earlier version; it cross‑references UK CAA AD 006-10-97 but does not itself alter the declared applicability."},"complexity_factors":["Mandatory reliance on an external technical document: British Aerospace TNS CT (Moth) No. 29 Issue 3 (Requirement paragraphs reference 2.A, 2.B, 2.C)","Multiple conditional compliance triggers and intervals (flying hours vs years; calendar-month inspection cycles; shorter initial deadlines if no renewal evidence) (Compliance section clauses 1 and 2)","Event‑driven inspections required 'before further flight' after heavy landing or undercarriage trauma, with the AD deferring to the TNS definition of those events (Compliance 2)","Wide applicability to 'All DH 83 series aircraft' increases number of affected operators (Applicability)","Cross-reference to another regulator's AD (UK CAA AD 006-10-97) creating potential for differing interpretive materials (Note)","Enforcement and authority under CASR subregulation 39.1(1) situates responsibility with CASA delegate, but technical execution depends on operators and maintenance providers"],"plain_english_summary":"This Airworthiness Directive requires owners/operators of De Havilland DH 83 (Fox Moth) aircraft to carry out specified actions and inspections on cockpit lateral tie rods and related structure, as set out in British Aerospace Technical News Sheet CT (Moth) No. 29 Issue 3. It applies to all DH 83 series and sets mandatory compliance windows (flying-hours/years and calendar-month intervals) and inspections after heavy landings. Owners/operators bear the cost and scheduling burden and must follow the external TNS for technical procedures."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dh-83-3-cockpit-lateral-tie-rods-and-aircraft-structure","history":"/api/acts/ad-dh-83-3-cockpit-lateral-tie-rods-and-aircraft-structure/history","analysis":"/api/acts/ad-dh-83-3-cockpit-lateral-tie-rods-and-aircraft-structure/analysis","conflicts":"/api/acts/ad-dh-83-3-cockpit-lateral-tie-rods-and-aircraft-structure/conflicts","importantCases":"/api/acts/ad-dh-83-3-cockpit-lateral-tie-rods-and-aircraft-structure/important-cases","documents":"/api/acts/ad-dh-83-3-cockpit-lateral-tie-rods-and-aircraft-structure/documents"}}