{"id":"F2006B09990","name":"AD/FU24/43 - Installation of Crash Axes","slug":"ad-fu24-43-installation-of-crash-axes","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55327,"registerId":"commonwealth-F2006B09990-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/FU24/43 - Installation of Crash Axes","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)  Airparts (NZ) Ltd. FU 24 Series Aeroplanes\n\n \n\nAD/FU24/43 Installation of Crash Axes 9/71\n\nApplicability: All models.\n\n \n\nRequirement: 1. Aircraft engaged in agricultural operations - Install a crash axe on the left hand inner side of the cockpit immediately below the canopy opening.\n\n \n\n2. Aircraft fitted out for passenger carrying in the fuselage - Install a crash axe on the left hand inner side of the cockpit immediately below the canopy opening, and another on the inside surface of the cargo door.\n\n \n\nCompliance: Within 100 hours time in service after 30 September 1971.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This is a discrete, single-purpose airworthiness directive from 1971. It has not expanded beyond its original narrow scope of requiring crash axe installation on one specific aircraft type."},"complexity_factors":["Single page directive with no defined terms section","No cross-references to other legislation or regulations","Simple conditional structure: two categories of aircraft with straightforward requirements","Plain language requirements ('Install a crash axe on the left hand inner side')","Single compliance deadline with clear calculation method","No exceptions, exemptions, or nested conditions"],"plain_english_summary":"This is an **Airworthiness Directive** (a mandatory safety order) issued by Australia's Civil Aviation Safety Authority. It requires owners of **Airparts (NZ) Ltd FU-24 series aircraft** to install emergency crash axes in specific locations.\n\n**Who it affects:**\n- Operators of FU-24 agricultural aircraft (crop dusters/sprayers)\n- Operators using these planes for passenger transport\n\n**What it requires:**\n- **Agricultural operations:** Install one crash axe on the left inner cockpit wall, below the canopy opening\n- **Passenger operations:** Install two crash axes — one in the same cockpit location, plus another on the inside of the cargo door\n\n**Why it matters:**\nCrash axes are emergency tools for cutting through aircraft structure to escape after a crash. This directive ensures pilots and passengers can quickly exit the aircraft in an emergency, particularly important given the FU-24's use in low-level agricultural flying where accidents carry higher risk.\n\n**Deadline:** Aircraft had to comply within 100 hours of flying time after 30 September 1971."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument itself states applicability as \"All models\" and sets out two distinct installation requirements based on aircraft role (Requirement 1–2). The text contains no indication that the scope has been altered from that stated applicability; therefore no change from the stated scope is apparent in the document provided."},"complexity_factors":["Short, prescriptive text with narrowly defined hardware requirement (Requirement 1–2).","Clear applicability statement: \"All models\" (Applicability).","Two operational configurations treated separately (agricultural vs passenger-carrying), requiring operators to determine the aircraft's fitted role (Requirement 1–2).","Fixed compliance window (100 hours after 30 September 1971) creates a scheduling obligation (Compliance).","Lack of technical mounting detail may require operator judgment or maintenance engineering to implement safely (Requirement 1–2)."],"plain_english_summary":"This AD requires all Airparts (NZ) FU 24 series aeroplanes to carry specified crash axes in set cockpit/cargo locations, with different fitment depending on whether the aircraft is used for agricultural work or configured to carry fuselage passengers. Operators/owners must procure and install the axes within the AD’s 100‑hour service window (after 30 Sept 1971), bearing equipment, labour and recordkeeping costs; the directive prescribes locations but leaves installation details to the operator/maintainer."}},"importantCases":[],"_links":{"self":"/api/acts/ad-fu24-43-installation-of-crash-axes","history":"/api/acts/ad-fu24-43-installation-of-crash-axes/history","analysis":"/api/acts/ad-fu24-43-installation-of-crash-axes/analysis","conflicts":"/api/acts/ad-fu24-43-installation-of-crash-axes/conflicts","importantCases":"/api/acts/ad-fu24-43-installation-of-crash-axes/important-cases","documents":"/api/acts/ad-fu24-43-installation-of-crash-axes/documents"}}