{"id":"F2006B08243","name":"AD/CESSNA 337/24 - Forward Engine Compartment - Self Locking Nuts - Inspection","slug":"ad-cessna-337-24-forward-engine-compartment-self-locking-nuts-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115511,"registerId":"commonwealth-F2006B08243-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 337/24 - Forward Engine Compartment - Self Locking Nuts - Inspection","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 337 Series Aeroplanes\n\n \n\nAD/CESSNA 337/24 Forward Engine Compartment - Self\n\nLocking Nuts - Inspection\n\n\n10/77\n\n \n\nApplicability: All models 337 with S/Nos. 33701672 to 33701748; All models P337 with S/Nos.\n\nP3370226 to P3370257.\n\n \n\nDocument: Cessna SL ME77-18 Item No. 1.\n\n \n\nCompliance: Within 100 hours time in service after 31 October 1977.\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":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2331},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow technical scope addressing a specific airworthiness concern regarding self-locking nuts in particular Cessna 337 aircraft. There is no evidence of scope expansion beyond this specific safety maintenance requirement."},"complexity_factors":["Extremely brief directive with only four substantive provisions","Narrow applicability restricted to specific serial number ranges","Single compliance requirement with unambiguous deadline","Technical inspection details delegated to external manufacturer document"],"plain_english_summary":"This is an aviation safety directive requiring owners of specific Cessna 337 aircraft to inspect self-locking nuts in the forward engine compartment.\n\n**Who it affects:** Owners and operators of specific Cessna 337 and P337 model aircraft with these serial numbers:\n- **Cessna 337 models:** Serial numbers 33701672 to 33701748\n- **Cessna P337 models:** Serial numbers P3370226 to P3370257\n\n**What you must do:** Inspect the self-locking nuts in the forward engine compartment. The detailed instructions for this inspection are found in **Cessna Service Letter ME77-18, Item No. 1** (you'll need to obtain this document from the manufacturer).\n\n**When:** Complete the inspection within 100 hours of flight time (called \"time in service\") after 31 October 1977.\n\n**Why it matters:** This directive addresses a potential safety defect with these specific fasteners to prevent mechanical failure and ensure the aircraft remains safe to fly."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-337-24-forward-engine-compartment-self-locking-nuts-inspection","history":"/api/acts/ad-cessna-337-24-forward-engine-compartment-self-locking-nuts-inspection/history","analysis":"/api/acts/ad-cessna-337-24-forward-engine-compartment-self-locking-nuts-inspection/analysis","conflicts":"/api/acts/ad-cessna-337-24-forward-engine-compartment-self-locking-nuts-inspection/conflicts","importantCases":"/api/acts/ad-cessna-337-24-forward-engine-compartment-self-locking-nuts-inspection/important-cases","documents":"/api/acts/ad-cessna-337-24-forward-engine-compartment-self-locking-nuts-inspection/documents"}}