{"id":"F2006B09418","name":"AD/ELECT/40 - Slick Magneto Coil","slug":"ad-elect-40-slick-magneto-coil","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":53798,"registerId":"commonwealth-F2006B09418-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/ELECT/40 - Slick Magneto Coil","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 107 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nElectrical Equipment\n\nAD/ELECT/40 Slick Magneto Coil 11/81\n\nApplicability: SLICK magnetos model No. 4201, 4201R, 4216, 4216R, 4230, 4230R, 4250, 4250R,\n\n4251, 4251R, 4252, 4252R, 4281, 4281R, 6210, 6210R, 6214 and 6214R.\n\nThe Serial Number range of these magnetos includes:\n\n| 8100000-8109999 | October, 1978   |\n| --------------- | --------------- |\n| 8110000-8119999 | November, 1978  |\n| 8120000-8129999 | December, 1978  |\n| 9010000-9019999 | January, 1979   |\n| 9020000-9029999 | February, 1979  |\n| 9030000-9039999 | March, 1979     |\n| 9040000-9049999 | April, 1979     |\n| 9050000-9059999 | May, 1979       |\n| 9060000-9069999 | June, 1979      |\n| 9070000-9079999 | July, 1979      |\n| 9080000-9089999 | August, 1979    |\n| 9090000-9099999 | September, 1979 |\n| 9100000-9109999 | October, 1979   |\n| 9110000-9119999 | November, 1979  |\n| 9120000-9129999 | December, 1979  |\n| 0010000-0019999 | January, 1980   |\n| 0020000-0029999 | February, 1980  |\n| 0030000-0039999 | March, 1980     |\n| 0040000-0049999 | April, 1980     |\n\nThe above magneto models are installed on, but not limited to the following engines:\n\n|      | Teledyne Continental |          |\n| ---- | -------------------- | -------- |\n| A-65 | C-90                 | O-470    |\n| A-75 | O-200                | IO-470   |\n| C-75 | IO-360               | IO-520   |\n| C-85 | TSIO-360             | TSIO-520 |\n\nLycoming\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 107 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n| 0-235-H2C | 0-320-E1J    | 0-360-C1E     |\n| --------- | ------------ | ------------- |\n| 0-235-K2C | 0-320-E2D    | 0-360-C1F     |\n| 0-235-L2C | 0-320-E2G    | 0-360-C2E     |\n| 0-320-A2D | 0-320-E3D    | 0-360-F1A6    |\n| 0-320-D1D | AEI0-320-E1B | AEI0-360-B1G6 |\n| 0-320-D2G | AEI0-320-E2B | AEI0-360-H1A  |\n| 0-320-D2J | 0-360-A4K    |               |\n| 0-320-D3G | 0-360-A4M    |               |\n\nDocument: Slick SB1-81. Lycoming SB457A, Cessna SIL SE81-30 and FAA AD 81-16-05 also refer.\n\nCompliance: Within the next 100 hours time in service after 30 November 1981.\n\nBackground: The manufacturer has indicated that a situation exists in a certain group of coils that could facilitate cracking of the coil potting compound and a subsequent shorting failure. The above group include coils which have already failed in service both in Australia and overseas.","sortOrder":0}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive applies narrowly to the listed Slick magneto models and serial-number ranges installed on specified Continental and Lycoming engines and mandates inspection/rectification within a set time window. The text gives no indication that the instrument's scope was altered from its original formulation."},"complexity_factors":["Identification burden from multiple specific magneto models and long serial-number ranges (Applicability list).","Cross-reference to multiple engine types across two manufacturers (listed engines), requiring checks across fleet records.","Fixed compliance metric combining a calendar date and a short flight-hours window (Compliance: 100 hours after 30 Nov 1981), which can complicate scheduling.","References to several service documents (Slick SB1-81, Lycoming SB457A, Cessna SIL SE81-30, FAA AD 81-16-05) increase the number of technical sources operators must consult.","Remedial action is operational (inspect/repair/replace) and imposes direct maintenance cost and logistics on owners/operators."],"plain_english_summary":"This airworthiness directive requires operators to inspect and, and if necessary, repair or replace certain Slick magneto coils (specified by model and serial-number ranges) fitted to listed Continental and Lycoming engines. Compliance had to be achieved within 100 hours time in service after 30 November 1981. It was issued because the manufacturer reported that potting-compound cracking can lead to coil shorting and in-service failures. Aircraft owners/operators and maintenance organisations are responsible for identifying affected units and paying for inspections and any corrective work."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive targeting a specific manufacturing defect in identified aircraft components. It has not expanded beyond its original purpose of addressing the coil potting compound cracking issue in SLICK magnetos from the 1978-1980 production period."},"complexity_factors":["Highly specific technical scope — applies only to 18 specific magneto models with serial numbers in defined date ranges","Extensive cross-referencing to external technical documents (Slick SB1-81, Lycoming SB457A, Cessna SIL SE81-30, FAA AD 81-16-05) — compliance requires consulting manufacturer service bulletins not reproduced in the directive","Tabular data presentation for serial numbers and engine models creates visual density but doesn't add legal complexity","Single clear compliance deadline (100 hours time in service after 30 November 1981) with no conditional exceptions or nested requirements","No defined terms section or interpretive provisions — language is technical but straightforward","Short document (approximately 1 page) with singular purpose"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspection or replacement of certain SLICK magnetos (manufactured Oct 1978–Apr 1980) installed on many Teledyne Continental and Lycoming engines, after a defect in the coil potting compound was found to cause short-circuit failures.  \n\nOperators of affected aircraft must comply within 100 flight hours (after 30 Nov 1981) using the manufacturer and FAA service instructions to prevent engine stoppage or misfire in flight."}},"importantCases":[],"_links":{"self":"/api/acts/ad-elect-40-slick-magneto-coil","history":"/api/acts/ad-elect-40-slick-magneto-coil/history","analysis":"/api/acts/ad-elect-40-slick-magneto-coil/analysis","conflicts":"/api/acts/ad-elect-40-slick-magneto-coil/conflicts","importantCases":"/api/acts/ad-elect-40-slick-magneto-coil/important-cases","documents":"/api/acts/ad-elect-40-slick-magneto-coil/documents"}}