{"id":"F2006B08205","name":"AD/CESSNA 320/26 - Main Landing Gear Fork-Bolt - Replacement","slug":"ad-cessna-320-26-main-landing-gear-fork-bolt-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115421,"registerId":"commonwealth-F2006B08205-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 320/26 - 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 320 Series Aeroplanes\n\n \n\nAD/CESSNA 320/26 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":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD, as presented, applies to all Cessna 320 models and mandates replacement of the main landing gear fork-bolt according to the referenced requirement document(s). The text contains no indication that the scope has been altered from the directive’s stated applicability (Applicability: \"All models.\")."},"complexity_factors":["Directive text is very short and delegates procedural detail to external documents (Document; Compliance).","Applicability covers all models, so the directive potentially affects a broad population of aircraft owners/operators (Applicability).","Compliance depends on obtaining and following one of two referenced documents, which forces implementers to reconcile external technical instructions (Document).","The AD does not state timing, parts, or labour requirements in this text, creating administrative steps to locate and apply the requirement document (Compliance)."],"plain_english_summary":"This AD mandates replacement of the main landing‑gear fork‑bolt on all Cessna 320 models. Compliance must be carried out per the referenced documents (Cessna Service Letter ME75‑23 or FAA AD 76‑13‑07), which set the timing, parts and procedures. It is a mandatory obligation for operators; technical rationale, detailed steps and cost/timing impacts are in the referenced documents."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive focused on a specific mechanical component (main landing gear fork-bolt) for a specific aircraft series (Cessna 320). It has not expanded beyond its original purpose of mandating a safety-critical replacement."},"complexity_factors":["Extremely short document (approximately 150 words)","No defined terms section — uses plain technical language","No conditional logic or nested exceptions","Single compliance pathway with two alternative reference documents","No cross-references to other legislation beyond the two cited documents","Straightforward applicability ('All models') with no exclusions"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA).\n\n**What it does:** It requires owners and operators of **Cessna 320 series aeroplanes** to replace the **fork-bolt** on the main landing gear. The fork-bolt is a critical component that helps hold the landing gear together; if it fails, the landing gear could collapse.\n\n**Who it affects:** Anyone who owns, operates, or maintains a Cessna 320 aircraft in Australia.\n\n**What you must do:** Follow the instructions in one of two documents:\n- **Cessna Service Letter ME75-23** (issued by the manufacturer), OR\n- **FAA AD 76-13-07** (the equivalent US safety order)\n\n**Why it matters:** This directive addresses a known safety defect. The original fork-bolt design may be prone to failure, which could cause the main landing gear to collapse during landing or taxiing — potentially causing serious injury, death, or aircraft damage. Compliance is **legally mandatory**; you cannot fly the aircraft until this work is done.\n\n**Key point:** This AD doesn't spell out the exact technical steps itself — it \"points to\" the manufacturer’s service letter or the US FAA directive for the detailed instructions."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-320-26-main-landing-gear-fork-bolt-replacement","history":"/api/acts/ad-cessna-320-26-main-landing-gear-fork-bolt-replacement/history","analysis":"/api/acts/ad-cessna-320-26-main-landing-gear-fork-bolt-replacement/analysis","conflicts":"/api/acts/ad-cessna-320-26-main-landing-gear-fork-bolt-replacement/conflicts","importantCases":"/api/acts/ad-cessna-320-26-main-landing-gear-fork-bolt-replacement/important-cases","documents":"/api/acts/ad-cessna-320-26-main-landing-gear-fork-bolt-replacement/documents"}}