{"id":"F2006B05240","name":"AD/CESSNA 206/35 - Cylinder Head Temperature Probe","slug":"ad-cessna-206-35-cylinder-head-temperature-probe","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":45541,"registerId":"commonwealth-F2006B05240-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 206/35 - Cylinder Head Temperature Probe","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 206/35 Cylinder Head Temperature Probe 8/82\n\nApplicability: Model U206 with S/Nos. U20604650 thru U20606365, except the following U20606164, U20606173, U20606198, U20606204, U20606271, U20606281, U20606287, U20606298, U20606305, U20606314, U20606315, U20606322, U20606326, U20606327, U20606331, U20606334, U20606337, U20606338, U20606344, U20606345, U20606348, U20606349, U20606350, U20606352, U20606353, U20606355, U20606359, U20606364, U20606366, U20606367.\n\nRequirement: Action in accordance with Cessna SIL No. SE82-18. Compliance: Within 100 hours time in service after 31 August 1982.\n\nBackground: It has been established by the airframe manufacturer that the hottest cylinder during most critical flight stages is cylinder No. 3 as distinct from cylinder No. 1 where the temperature probe is currently located.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2347},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is the original 1982 directive addressing a specific airworthiness concern regarding temperature probe placement on affected Cessna aircraft. The scope remains focused on the original technical safety issue."},"complexity_factors":["30 specific serial number exceptions in the applicability clause","Reference to external technical document (Cessna SIL No. SE82-18) without reproducing contents","Aviation-specific terminology (Time in Service, Cylinder Head Temperature Probe)"],"plain_english_summary":"This airworthiness directive requires owners of specific Cessna 206 aircraft to relocate the engine temperature sensor. Currently, the sensor monitors cylinder No. 1, but testing showed cylinder No. 3 runs hottest and should be monitored instead to prevent engine damage.\n\n**Who it affects:** Owners of Cessna Model U206 aircraft with serial numbers U20604650 through U20606365, except for 30 specific serial numbers listed in the directive.\n\n**What you must do:** Follow the instructions in Cessna Service Information Letter No. SE82-18 to address the temperature probe location.\n\n**When:** Within 100 hours of flight time after 31 August 1982.\n\n**Why it matters:** If the temperature probe stays on the wrong cylinder, pilots won't get accurate warnings about engine overheating, which could lead to serious engine damage or failure during flight."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-206-35-cylinder-head-temperature-probe","history":"/api/acts/ad-cessna-206-35-cylinder-head-temperature-probe/history","analysis":"/api/acts/ad-cessna-206-35-cylinder-head-temperature-probe/analysis","conflicts":"/api/acts/ad-cessna-206-35-cylinder-head-temperature-probe/conflicts","importantCases":"/api/acts/ad-cessna-206-35-cylinder-head-temperature-probe/important-cases","documents":"/api/acts/ad-cessna-206-35-cylinder-head-temperature-probe/documents"}}