{"id":"F2006B03737","name":"AD/BEECH 23/24 - Acrobatic Manoeuvres - Placard","slug":"ad-beech-23-24-acrobatic-manoeuvres-placard","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43330,"registerId":"commonwealth-F2006B03737-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 23/24 - Acrobatic Manoeuvres - Placard","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Beechcraft 19, 23 and 24 Series Aeroplanes\n\n \n\nAD/BEECH 23/24 Acrobatic Manoeuvres - Placard 8/74\n\nApplicability: Model B-19 with S/Nos.MB-481 to MB-634and MB-649 and Model C-23 with S/Nos. M-1285 to M-1493 except M-1437 and M-1491 - not fitted with spin improvement Kit No. 23-4007-1S.\n\n \n\nRequirement: Remove all placards pertaining to intentional spins and acrobatic flight and replace with a placard, conspicuously located on the instrument panel, as follows :\n\n \n\n“THIS AEROPLANE MUST BE OPERATED AS A NORMAL OR UTILITY CATEGORY AEROPLANE ONLY. INTENTIONAL SPINS ARE PROHIBITED. NO ACROBATIC MANOEUVRES APPROVED EXCEPT CHANDELLES, LAZY EIGHTS, STEEP TURNS AND STALLS (EXCEPT WHIP STALLS).”\n\n \n\nCompliance: Before issue of a Certificate of Airworthiness.\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive from 1974 (as indicated by the '8/74' suffix). It has not expanded beyond its original purpose of restricting aerobatic operations for specific Beechcraft variants without spin kits. The scope remains tightly constrained to the specific safety issue identified."},"complexity_factors":["Single, specific requirement with no conditional logic or exceptions","Only 2 defined applicability criteria (aircraft model/serial numbers and absence of specific kit)","No cross-references to other legislation or regulations beyond the parent Civil Aviation Regulations 1988 citation","Simple compliance deadline (before Certificate of Airworthiness issuance)","Total length is approximately 150 words","No nested definitions or interpretive provisions"],"plain_english_summary":"This is an **Airworthiness Directive** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for specific aircraft.\n\n**What it does:**\nIt requires owners of certain **Beechcraft 19 and 23 series aeroplanes** (specific serial numbers that haven't had a particular \"spin improvement kit\" installed) to **replace warning placards in the cockpit**.\n\n**The new placard must clearly state:**\n- The plane can only be used for **normal or utility category flying** (not aerobatics)\n- **Intentional spins are banned**\n- Only four specific manoeuvres are allowed: **chandels, lazy eights, steep turns, and stalls** (but not \"whip stalls\")\n\n**Who it affects:**\nOwners and operators of specific Beechcraft Model B-19 and C-23 aircraft built between certain serial numbers, specifically those **without** the spin improvement kit installed.\n\n**Why it matters:**\nThis directive addresses a **safety risk** — likely that these particular aircraft without the modification kit have dangerous spin characteristics. Rather than requiring expensive hardware modifications, CASA is using a **placard restriction** to prevent pilots from attempting dangerous manoeuvres that could lead to loss of control. It's a cost-effective way to keep these older aircraft flying safely while limiting their operational envelope."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive does not broaden the set of affected aircraft beyond the explicitly listed models and serial numbers; it imposes a targeted change to in‑cockpit placarding and operational limitations that must be implemented before a Certificate of Airworthiness is issued. In that sense the instrument is narrowly scoped and substitutes a specified placard and operational restriction in place of any prior placards allowing intentional spins or acrobatic flight (Applicability; Requirement; Compliance)."},"complexity_factors":["Narrow applicability by specific models and serial number ranges with explicit exceptions (Applicability)","Single, mandatory physical action: remove existing placards and install a precisely worded placard (Requirement)","Timing tied to regulatory certification (must be done before Certificate of Airworthiness is issued) (Compliance)","Clear operational limitations specified by the placard text (prohibition of spins; allowed manoeuvres) (Requirement)","No additional technical modifications or repeated actions required in the text — simple one‑off compliance"],"plain_english_summary":"What this instrument does (mechanically)\n\n- It is an airworthiness directive that applies to specific Beechcraft B‑19 and C‑23 series aeroplanes listed by serial number, except where the aircraft is fitted with Spin Improvement Kit No. 23‑4007‑1S. (Applicability)\n- It requires removal of any placards that permit intentional spins or otherwise pertain to acrobatic flight, and replacement with a single, specific placard mounted conspicuously on the instrument panel. The required placard text is:  \n\n  “THIS AEROPLANE MUST BE OPERATED AS A NORMAL OR UTILITY CATEGORY AEROPLANE ONLY. INTENTIONAL SPINS ARE PROHIBITED. NO ACROBATIC MANOEUVRES APPROVED EXCEPT CHANDELLES, LAZY EIGHTS, STEEP TURNS AND STALLS (EXCEPT WHIP STALLS).”  \n\n(Requirement)\n- The replacement must be completed before the aircraft is issued a Certificate of Airworthiness. (Compliance)\n\nWho pays, who decides, and what changes in behaviour\n\n- Who decides: The Civil Aviation Safety Authority issues the directive as part of the Schedule of Airworthiness Directives under the Civil Aviation Regulations (header). Enforcement and certification functions tied to airworthiness are performed by the relevant certificating authority when assessing Certificates of Airworthiness. (header; Compliance)\n- Who pays: Owners/operators of the affected aircraft are responsible for removing old placards and fitting the new one. That responsibility includes procuring or producing the placard and arranging its installation. (Requirement)\n- Behaviour change required: Pilots/operators of affected aircraft must not operate the aeroplane in intentional spins and must limit acrobatic manoeuvres to the four listed (chandelles, lazy eights, steep turns and stalls except whip stalls). The new placard must be displayed on the instrument panel before a Certificate of Airworthiness is issued. (Requirement; Compliance)\n\nStated purpose and a practical test against costs and trade-offs\n\n- Stated purpose (as expressed by the directive): to prohibit intentional spins and restrict acrobatic manoeuvres for the listed aircraft by changing the in‑cockpit placarding. (Requirement)\n\n- Implementation cost and compliance burden: The directive imposes a discrete, one‑time administrative and physical action — removing and replacing placards — which the aircraft owner/operator must complete before certification. That creates a direct compliance cost (time and expense to prepare/acquire and install the placard) and an administrative checkpoint tied to issuance of the Certificate of Airworthiness. (Requirement; Compliance)\n\n- Effects on private choice and commercial activity: The directive narrows the in‑flight manoeuvres the owner/operator may lawfully undertake in the aircraft (no intentional spins; only the four listed acrobatic manoeuvres permitted). That reduces operational options for owners, flight instructors, or charterers using an affected aeroplane. It may change demand for particular uses of these models (for example, spin training) and therefore could affect decisions by operators or maintenance/repair facilities that serve them. (Requirement)\n\n- Incentives and substitution effects: Owners/operators who wish to conduct prohibited manoeuvres would need to use a different aircraft not covered by the AD or fit an excluded modification (the spin improvement kit listed as an exception) if eligible; the AD therefore creates an incentive to switch aircraft or configuration for those activities. (Applicability)\n\n- Enforcement and timing risk: Because compliance is required before issuance of a Certificate of Airworthiness, non‑compliance directly affects an aircraft's ability to enter service or be certificated. That concentrates enforcement at the certification stage rather than relying on in‑flight monitoring. (Compliance)\n\n- Discretion and administrative scope: The directive prescribes a mandatory placard, specific text, and a clear compliance timing; it leaves little room for discretionary variation in wording or placement beyond the requirement that the placard be conspicuously located on the instrument panel. (Requirement)\n\nConcentrated benefits and diffuse costs (mechanism only)\n\n- Benefit concentration: The directive is likely intended to reduce particular flight exposures for the listed aircraft (this is the stated operational effect in the placard text). Any safety or regulatory benefits would accrue to regulators and to the public that relies on airworthiness enforcement; the instrument itself confers no direct financial benefit to owners. (Requirement)\n- Diffuse costs: The costs (time, small expense for the placard, and reduced operational options) fall on the owners/operators of the specified serial‑numbered aircraft. Those owners are a narrow, identifiable group because applicability is by serial number. (Applicability; Requirement)\n\nNotes on scope and applicability\n\n- Applicability is narrowly defined by model and serial number ranges, with two serial numbers explicitly excluded and a further exclusion if the aircraft is fitted with Spin Improvement Kit No. 23‑4007‑1S. (Applicability)\n- The directive is limited in mechanism: it controls cockpit placarding to restrict permitted manoeuvres and ties compliance to certification. It does not, in the text provided, mandate structural modification, flight testing, or recurring inspections. (Requirement; Compliance)"}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-23-24-acrobatic-manoeuvres-placard","history":"/api/acts/ad-beech-23-24-acrobatic-manoeuvres-placard/history","analysis":"/api/acts/ad-beech-23-24-acrobatic-manoeuvres-placard/analysis","conflicts":"/api/acts/ad-beech-23-24-acrobatic-manoeuvres-placard/conflicts","importantCases":"/api/acts/ad-beech-23-24-acrobatic-manoeuvres-placard/important-cases","documents":"/api/acts/ad-beech-23-24-acrobatic-manoeuvres-placard/documents"}}