{"id":"F2006B05242","name":"AD/CESSNA 206/37 - Isolator Mounts P/N 700-2500-1","slug":"ad-cessna-206-37-isolator-mounts-p-n-700-2500-1","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":45548,"registerId":"commonwealth-F2006B05242-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 206/37 - Isolator Mounts P/N 700-2500-1","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nCessna 206 Series Aeroplanes\n\nAD/CESSNA 206/37 Isolator Mounts P/N 700-2500-1 2/85\n\nApplicability: All model 206 with SCL Turbine Pac powerplant P/N 780- 1000-1 converted in accordance with STC’s SE2352NM and SA2353NM.\n\nRequirement: Action in accordance with Soloy Conversions S.B. 01-763.\n\nCompliance: 1. Within 100 hours time in service after 28 February 1985 or at the next schedule inspection for Maintenance Release issue after 28 February 1985 whichever is the later.\n\n2. Thereafter at intervals of 100 hours time in service or at subsequent scheduled inspections for Maintenance Release issue whichever is the later until replaced in accordance with the Requirement Document.\n\nBackground: Operational experience has shown that small tears and cracks can occur and failure to detect these defects may result in the isolator mounts losing their ability to carry the loads imposed.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1978},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This airworthiness directive maintains a narrow, technical scope focused solely on inspecting and replacing defective isolator mounts in specific modified aircraft. It has not expanded beyond the original safety purpose of addressing potential structural failure in engine mounting components."},"complexity_factors":["Multiple specific part number references requiring cross-checking (P/N 700-2500-1, P/N 780-1000-1)","External document reference to Soloy Conversions Service Bulletin 01-763","Dual conditional compliance timing ('whichever is the later') creating a floor for inspection intervals","Supplemental Type Certificate (STC) applicability constraints narrowing the affected fleet"],"plain_english_summary":"This is a safety mandate for operators of specific Cessna 206 planes that have undergone a turbine engine conversion. If your aircraft runs a Soloy Turbine Pac engine (converted under STCs SE2352NM or SA2353NM), you must inspect the engine isolator mounts for hairline cracks and tears.\n\n**What you need to do:**\n- **Inspect:** Check isolator mounts (part no. 700-2500-1) following Soloy's Service Bulletin 01-763\n- **First check:** Within 100 flight hours after 28 February 1985, or at your next scheduled maintenance check—whichever comes *later*\n- **Ongoing:** Repeat every 100 flight hours or at each scheduled maintenance check until you replace the parts per the manufacturer's instructions\n\n**Why it matters:**\nThese mounts can develop tiny cracks that are easy to miss. If they fail, the engine could literally separate from the airframe. This directive keeps your engine attached to your plane where it belongs."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-206-37-isolator-mounts-p-n-700-2500-1","history":"/api/acts/ad-cessna-206-37-isolator-mounts-p-n-700-2500-1/history","analysis":"/api/acts/ad-cessna-206-37-isolator-mounts-p-n-700-2500-1/analysis","conflicts":"/api/acts/ad-cessna-206-37-isolator-mounts-p-n-700-2500-1/conflicts","importantCases":"/api/acts/ad-cessna-206-37-isolator-mounts-p-n-700-2500-1/important-cases","documents":"/api/acts/ad-cessna-206-37-isolator-mounts-p-n-700-2500-1/documents"}}