COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Electrical Equipment AD/ELECT/40 Slick Magneto Coil 11/81 Applicability: SLICK magnetos model No. 4201, 4201R, 4216, 4216R, 4230, 4230R, 4250, 4250R, 4251, 4251R, 4252, 4252R, 4281, 4281R, 6210, 6210R, 6214 and 6214R. The Serial Number range of these magnetos includes: 8100000-8109999 October, 1978 8110000-8119999 November, 1978 8120000-8129999 December, 1978 9010000-9019999 January, 1979 9020000-9029999 February, 1979 9030000-9039999 March, 1979 9040000-9049999 April, 1979 9050000-9059999 May, 1979 9060000-9069999 June, 1979 9070000-9079999 July, 1979 9080000-9089999 August, 1979 9090000-9099999 September, 1979 9100000-9109999 October, 1979 9110000-9119999 November, 1979 9120000-9129999 December, 1979 0010000-0019999 January, 1980 0020000-0029999 February, 1980 0030000-0039999 March, 1980 0040000-0049999 April, 1980 The above magneto models are installed on, but not limited to the following engines: Teledyne Continental A-65 C-90 O-470 A-75 O-200 IO-470 C-75 IO-360 IO-520 C-85 TSIO-360 TSIO-520 Lycoming COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES 0-235-H2C 0-320-E1J 0-360-C1E 0-235-K2C 0-320-E2D 0-360-C1F 0-235-L2C 0-320-E2G 0-360-C2E 0-320-A2D 0-320-E3D 0-360-F1A6 0-320-D1D AEI0-320-E1B AEI0-360-B1G6 0-320-D2G AEI0-320-E2B AEI0-360-H1A 0-320-D2J 0-360-A4K 0-320-D3G 0-360-A4M Document: Slick SB1-81. Lycoming SB457A, Cessna SIL SE81-30 and FAA AD 81-16-05 also refer. Compliance: Within the next 100 hours time in service after 30 November 1981. Background: 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.