{"id":"F2006B04220","name":"AD/BEECH 90/29 Amdt 3 - Wing Front Spar","slug":"ad-beech-90-29-amdt-3-wing-front-spar","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43976,"registerId":"commonwealth-F2006B04220-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 revokes Airworthiness Directive (AD) AD/BEECH 90/29 Amdt 2 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.","sortOrder":0},{"sectionNumber":"AD/BEECH 90/29","sectionType":"part","heading":"AD/BEECH 90/29","content":"# AD/BEECH 90/29\n\nAmdt 3\n\nApplicability: All models.","sortOrder":1},{"sectionNumber":"Wing Front Spar 11/2000","sectionType":"part","heading":"Wing Front Spar 11/2000","content":"# AD/BEECH 90/29\n\nAmdt 3\n\nApplicability: All models.\n\n#   \nWing Front Spar 11/2000","sortOrder":2}],"analysis":{"flash_summary":{"complexity_score":6,"scope_assessment":{"changed":true,"description":"This amendment expressly revokes AD/BEECH 90/29 Amdt 2 and issues AD/BEECH 90/29 Amdt 3 (see opening paragraph). The supplied excerpt does not include the substantive requirement or compliance text, so while the instrument clearly replaces the prior amendment, the exact nature and extent of any change in technical requirements, timing, or affected activities cannot be determined from the excerpt alone. Applicability remains broad (\"All models\")."},"complexity_factors":["Revocation of a prior amendment and issuance of a new amendment (requires cross-checking Amdt 2 against Amdt 3).","Reference to external legislation (subregulation 39.1(1) of CAR 1998) which implementers may need to consult.","Applicability stated broadly as \"All models,\" increasing the number of affected operators.","Key substantive material (the requirement and compliance sections) is referenced but not included in the supplied excerpt, forcing reliance on the full AD for details.","Technical subject matter (wing front spar) typically requires specialist maintenance and inspection procedures.","Administrative discretion concentrated in the CASA delegate (decision-maker), which requires users to track delegated instrument text and possible further directions."],"plain_english_summary":"# What this instrument does\n\nThis document is an Airworthiness Directive (AD) titled \"AD/BEECH 90/29 Amdt 3\" about the wing front spar. Mechanically, it does three things:\n\n- Revokes the previous amendment, AD/BEECH 90/29 Amdt 2, and issues a new amendment (Amdt 3) (see opening paragraph).\n- States that the new AD is issued under subregulation 39.1(1) of the Civil Aviation Regulations 1998 (CAR 1998) (see opening paragraph).\n- Requires that the actions described in the AD’s requirement section be carried out for the aircraft or aeronautical product covered by the AD, in the circumstances, following the instructions and within the timing set out in the AD’s requirement and compliance sections (see opening paragraph).\n\nApplicability is stated as \"All models,\" so the AD applies to all models of the affected type (see \"Applicability: All models\"). The document header and several lines identify the subject as the wing front spar and include the date marker \"11/2000.\" \n\n# Who decides and who must act\n\n- Decision-maker: The CASA delegate is the official who revokes the old AD and issues this new AD (see opening paragraph).\n- Obligation-holder: The AD requires that the prescribed actions be taken \"in relation to the aircraft or aeronautical product mentioned in the applicability section.\" That places an obligation on the party responsible for compliance with ADs for those aircraft (for example, the owner/operator) to carry out the required actions described in the AD (see opening paragraph and applicability).\n\n# Why the AD exists (as stated) and how to evaluate that claim\n\n- The AD is issued \"for the reasons set out in the background section\" and to correct an \"unsafe condition\" by requiring the actions set out in the requirement section (see opening paragraph). That is the document’s stated purpose.\n\nEvaluation points to consider (based on the instrument’s text and its mechanics):\n\n- Costs and who pays: The AD requires actions to be taken on affected aircraft; the text therefore implies that the responsible parties for those aircraft must implement and fund those actions (see opening paragraph and applicability). The precise nature, scope and timing of those actions — and therefore the exact cost — are not included in the supplied excerpt.\n\n- Incentives and behaviour change: The AD creates a compliance obligation (must carry out the required action(s) in specified circumstances and times). That changes behaviour by mandating maintenance/inspection/repair actions as defined in the AD’s requirement and compliance sections (see opening paragraph).\n\n- Trade-offs and opportunity cost: Implementers will need to allocate labour, parts, and aircraft downtime to meet the AD’s requirements. The supplied text does not state what those resources are, so the scale of trade-offs cannot be determined from the excerpt.\n\n- Compliance burden and administrative discretion: The CASA delegate is the issuing authority (opening paragraph). The AD refers to requirement and compliance sections for the substantive instructions; because those substantive sections are not included in the supplied text, implementers must consult the complete AD to understand the detailed compliance burden and any options allowed by the AD.\n\n- Market effects and competition: The AD applies to \"All models,\" so it covers the whole fleet of the affected type (see applicability). The excerpt does not supply details on spare parts, approved repair methods, or mandated service providers; therefore any effects on parts markets, service providers, or competition are not determinable from the supplied text.\n\n# Practical note for operators and maintainers\n\nThe excerpt does not include the requirement or compliance text that specifies what must be done, how, and when. To comply and to estimate cost or operational impact, owners/operators must consult the full AD document (Amdt 3) that contains the requirement and compliance sections referenced here (see opening paragraph and applicability).\n\n(References in parentheses point to the clauses in the supplied excerpt.)"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This appears to be a routine amendment (Amendment 3) of an existing Airworthiness Directive. The scope remains consistent with the original AD/BEECH 90/29 — addressing wing front spar safety on Beechcraft 90 aircraft. The 'All models' applicability suggests it may have broadened from an earlier limited application, but this is typical for AD evolution as safety data emerges, not a fundamental shift in legislative purpose."},"complexity_factors":["Short, single-purpose instrument (approximately 200 words of substantive text)","Only one defined applicability criterion ('All models' of Beechcraft 90 series)","Simple structure: Background → Applicability → Requirement → Compliance (standard AD format)","No nested conditional logic or cross-references to other legislation beyond the enabling regulation (CAR 1998, subregulation 39.1(1))","Single technical subject matter (wing front spar) with presumably standard aviation maintenance terminology","Missing substantive content: The actual Requirement and Compliance sections appear truncated or not fully reproduced in the source text"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** issued by the **Civil Aviation Safety Authority (CASA)** — essentially a mandatory safety order for aircraft.\n\n**What it does:**\n- **Revokes** (cancels) the previous version of this directive (Amendment 2)\n- **Issues a new, updated version** (Amendment 3) that applies to **all models** of Beechcraft 90 series aircraft\n- Requires specific **inspection or repair work** on the **wing front spar** — a critical structural component that holds the wing to the fuselage\n\n**Who it affects:**\n- Owners and operators of Beechcraft 90 aircraft (including King Air models)\n- Maintenance engineers and organisations servicing these aircraft\n\n**Why it matters:**\nAirworthiness Directives are **legally binding safety instructions**. If an aircraft has an \"unsafe condition\" — in this case, apparently something wrong with the wing front spar that could affect flight safety — owners **must** complete the required inspections or repairs within the specified timeframe. Flying without complying can ground an aircraft or invalidate its airworthiness certificate.\n\nThe directive references compliance timeframes and detailed instructions in sections not fully reproduced here, but the core requirement is: **inspect and/or fix the wing front spar on all affected Beechcraft 90 aircraft**."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-90-29-amdt-3-wing-front-spar","history":"/api/acts/ad-beech-90-29-amdt-3-wing-front-spar/history","analysis":"/api/acts/ad-beech-90-29-amdt-3-wing-front-spar/analysis","conflicts":"/api/acts/ad-beech-90-29-amdt-3-wing-front-spar/conflicts","importantCases":"/api/acts/ad-beech-90-29-amdt-3-wing-front-spar/important-cases","documents":"/api/acts/ad-beech-90-29-amdt-3-wing-front-spar/documents"}}