{"id":"F2006B08258","name":"AD/CESSNA 340/12 - Main Landing Gear Fork-Bolt - Replacement","slug":"ad-cessna-340-12-main-landing-gear-fork-bolt-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115562,"registerId":"commonwealth-F2006B08258-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 340/12 - Main Landing Gear Fork-Bolt - Replacement","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)  Cessna 340 Series Aeroplanes\n\n \n\nAD/CESSNA 340/12 Main Landing Gear Fork-Bolt - Replacement 8/76\n\nApplicability: All models.\n\n \n\nDocument: 1. Cessna SL ME75-23; or\n\n \n\n2. FAA AD 76-13-07.\n\n \n\nCompliance: As detailed in the requirement document.\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\n \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 focused specifically on the Cessna 340 main landing gear fork-bolt. It has not expanded beyond its original safety purpose. The document appears to be a historical directive (reference number 8/76 suggests August 1976) and maintains its narrow, technical scope."},"complexity_factors":["Extremely short document (under 200 words)","Only 4 substantive provisions: applicability, document reference, compliance, and the action required","No defined terms section — relies entirely on external documents (Cessna SL and FAA AD)","No conditional logic, exceptions, or nested provisions","Single mechanical action required (replacement of one component)","Cross-references are simple pointers to external technical documents rather than legislative cross-references"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety notice issued by Australia's Civil Aviation Safety Authority (CASA). It requires owners and operators of **Cessna 340 series aircraft** to replace the **main landing gear fork-bolt** (a critical component that helps hold the landing gear together).\n\n**Who it affects:**\n- Anyone who owns, operates, or maintains a Cessna 340 aeroplane (all models).\n\n**What you must do:**\n- Follow the instructions in either:\n  - **Cessna Service Letter ME75-23**, or\n  - **FAA Airworthiness Directive 76-13-07** (the equivalent US safety notice).\n\n**Why it matters:**\nLanding gear failures can be catastrophic. This AD ensures a specific part prone to failure gets replaced before it causes an accident. Compliance is **legally mandatory** — you cannot fly the aircraft until the work is done."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument applies to all Cessna 340 models and requires replacement of the main landing gear fork‑bolt as specified in the named requirement documents. The AD text supplied does not expand or narrow applicability beyond that single mechanical requirement, and it delegates procedural detail to the referenced documents. There is no indication in the supplied text that the scope has been changed from its original stated action."},"complexity_factors":["Short, narrowly framed directive: single component (main landing gear fork‑bolt) replacement","Applicability stated simply (\"All models\"), reducing interpretive complexity","Primary substantive detail is delegated to external requirement documents (Cessna SL ME75‑23 or FAA AD 76‑13‑07), requiring cross‑reference","Compliance timing and procedure are not specified in the AD text itself (\"As detailed in the requirement document.\"), adding procedural dependence on external materials","Regulatory basis is clear (Part 39 Schedule of Airworthiness Directives), so legal authority is straightforward","Potential operational complexity for operators due to parts sourcing, scheduling and labour, none of which are detailed in the AD"],"plain_english_summary":"What this instrument does\n\n- This is an Airworthiness Directive issued under the Civil Aviation Regulations, Part 39, published in the Schedule of Airworthiness Directives by the Civil Aviation Safety Authority. (See header: \"(Civil Aviation Regulations 1998), PART 39 ... SCHEDULE OF AIRWORTHINESS DIRECTIVES\".)\n- Mechanically, it requires the replacement of the main landing gear fork‑bolt on Cessna 340 series aeroplanes. The AD is titled \"Main Landing Gear Fork‑Bolt - Replacement\" and is identified as AD/CESSNA 340/12 8/76.\n\nWho it affects\n\n- The directive applies to all Cessna 340 models. (\"Applicability: All models.\")\n- The practical burden falls on the aircraft owners and operators who are responsible for complying with airworthiness directives for their aircraft.\n\nHow compliance works\n\n- The AD does not set out the replacement procedure in full in the text supplied. Instead it requires compliance with one of two external requirement documents: either \"Cessna SL ME75‑23\" or \"FAA AD 76‑13‑07.\" (\"Document: 1. Cessna SL ME75‑23; or 2. FAA AD 76‑13‑07.\")\n- Timing and procedural detail are to be followed \"as detailed in the requirement document.\" (\"Compliance: As detailed in the requirement document.\")\n\nStated purpose and how that maps to costs and incentives\n\n- The directive’s title and placement in the Schedule of Airworthiness Directives indicate its purpose is to address an airworthiness issue by replacing the specified landing gear component. That is an explicit operational instruction rather than a general policy statement.\n- Who pays: owners/operators bear the cost of parts, labour and aircraft downtime required to carry out the replacement (this follows from the instrument directing action by operators; see \"Applicability\" and \"Compliance\").\n- Who decides and enforces: the Civil Aviation Safety Authority issued the AD under Part 39; compliance is governed by the referenced requirement documents. (See header and \"Document\"/\"Compliance\" fields.)\n- Incentives and trade‑offs: replacing the fork‑bolt increases immediate maintenance cost and aircraft downtime for operators in return for the airworthiness outcome the requirement documents are intended to secure. The AD channels operators toward the specific procedures and parts listed in the referenced documents, concentrating decision‑making about how to comply in those documents rather than in the AD text itself.\n\nCompliance burden, discretion and implementation risks\n\n- Compliance burden: the AD creates a procedural obligation without specifying timing or method in the AD itself; operators must obtain and follow one of the two referenced documents. (\"Document...\" and \"Compliance...\")\n- Administrative discretion: the AD delegates technical detail to the referenced documents; enforcement and any approvals for alternative actions would rest with the regulator under the regulatory framework in which this AD is issued (the header identifies the regulatory source). This delegation gives the referenced documents and the regulator practical control over acceptable compliance methods.\n- Implementation risks: because the AD points to external documents for the mandatory steps, risks include (a) variation in interpretation between documents, (b) delays while operators obtain the correct document or parts, and (c) potential supply or scheduling constraints that affect how quickly operators can comply.\n\nNet effect (mechanical, not evaluative)\n\n- Operators of Cessna 340 aircraft must cause the main landing gear fork‑bolt to be replaced in accordance with the specified requirement document. Compliance imposes direct costs on operators (parts, labour, downtime), while the AD itself centralises the method and timing to the referenced documents and the regulator’s enforcement of Part 39 obligations."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-340-12-main-landing-gear-fork-bolt-replacement","history":"/api/acts/ad-cessna-340-12-main-landing-gear-fork-bolt-replacement/history","analysis":"/api/acts/ad-cessna-340-12-main-landing-gear-fork-bolt-replacement/analysis","conflicts":"/api/acts/ad-cessna-340-12-main-landing-gear-fork-bolt-replacement/conflicts","importantCases":"/api/acts/ad-cessna-340-12-main-landing-gear-fork-bolt-replacement/important-cases","documents":"/api/acts/ad-cessna-340-12-main-landing-gear-fork-bolt-replacement/documents"}}