{"id":"F2006B11419","name":"AD/OPTICA/7 - Nose Undercarriage Leg Retention","slug":"ad-optica-7-nose-undercarriage-leg-retention","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":57335,"registerId":"commonwealth-F2006B11419-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\nFLS Aerospace OA7 Optica Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/OPTICA/7 Nose Undercarriage Leg Reten","sectionType":"part","heading":"AD/OPTICA/7 Nose Undercarriage Leg Retention 1/2004","content":"# AD/OPTICA/7 Nose Undercarriage Leg Retention 1/2004\n\nApplicability: Model OA7 aircraft, with constructors numbers up to and including OA7-022. Requirement: Action in accordance with FLS Aerospace Service Bulletin B2/MSB/5.\n\nNote: UK CAA AD 007-01-94 refers.\n\nCompliance: Unless already accomplished, at the next scheduled 50 hour inspection after 22 January 2004.\n\nThis Airworthiness Directive becomes effective on 22 January 2004.\n\nBackground: This Directive requires incorporation of Modification No. B2/MOD/46, which introduces an additional retention mechanism between the bearing block and the nose undercarriage leg, in the form of a tapered pin.\n\nThis Directive is issued following a review of current UK CAA Airworthiness Directives applicable to OA7 Optica aircraft.\n\n![Signature of David Villiers Delegate of the Civil Aviation Safety Authority](image.002.png)  \n\nDavid Villiers\n\nDelegate of the Civil Aviation Safety Authority 5 December 2003\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 24 December 2003.","sortOrder":1}],"analysis":{"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":"The Directive implements a specific retrofit (B2/MOD/46) for a defined subset of OA7 aircraft and adopts the UK CAA AD solution; it does not broaden affected aircraft, alter the prescribed remedy, or extend compliance timing beyond the stated next 50‑hour inspection. Scope therefore aligns with the original remedy referenced in the background and related UK AD."},"complexity_factors":["Narrow applicability: only Model OA7 aircraft with constructors numbers up to and including OA7-022 (Applicability).","Prescriptive technical remedy: requires incorporation of Modification No. B2/MOD/46 introducing a tapered pin and obedience to FLS Aerospace Service Bulletin B2/MSB/5 (Requirement; Background).","Fixed compliance timing tied to maintenance schedule: must be done at the next scheduled 50‑hour inspection after 22 January 2004 (Compliance).","Regulatory basis and enforcement: issued under CASR 1998 subregulation 39.1(1) and signed by a CASA delegate (preamble; signature).","Cross-reference to external authority: notes UK CAA AD 007-01-94 as related material (Note), creating reliance on overseas ADs/assessments."],"plain_english_summary":"This Airworthiness Directive requires fitting an additional tapered-pin retention between the bearing block and the nose undercarriage leg on FLS Aerospace OA7 Optica aeroplanes (constructor numbers up to and including OA7‑022). Operators must carry out the modification in accordance with FLS Aerospace Service Bulletin B2/MSB/5 at the next scheduled 50‑hour inspection after 22 January 2004. CASA enforces the requirement; aircraft owners/operators pay for and arrange the work."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a targeted safety directive addressing a specific mechanical defect in a limited fleet of aircraft. The scope remains precisely focused on the nose undercarriage retention issue as originally identified."},"complexity_factors":["Single, specific aircraft model and serial number range (OA7-022 and below)","One clear action required: install Modification B2/MOD/46 per Service Bulletin B2/MSB/5","Simple compliance deadline tied to routine maintenance schedule","No nested exceptions, conditional logic, or extensive cross-referencing","Background explanation is straightforward and technical but not legally convoluted","Only one external reference (UK CAA AD 007-01-94) noted for context"],"plain_english_summary":"The safety order requires owners/operators of FLS Aerospace OA7 Optica aircraft (serials up to OA7‑022) to fit a tapered backup pin to the nose landing gear bearing block to stop the nose leg from coming loose.  \n\nThis fix addresses a risk of nose‑undercarriage detachment in flight or landing, must be done by the next 50‑hour inspection after 22 Jan 2004, and was mandated by CASA (following a UK notice)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-optica-7-nose-undercarriage-leg-retention","history":"/api/acts/ad-optica-7-nose-undercarriage-leg-retention/history","analysis":"/api/acts/ad-optica-7-nose-undercarriage-leg-retention/analysis","conflicts":"/api/acts/ad-optica-7-nose-undercarriage-leg-retention/conflicts","importantCases":"/api/acts/ad-optica-7-nose-undercarriage-leg-retention/important-cases","documents":"/api/acts/ad-optica-7-nose-undercarriage-leg-retention/documents"}}