# AD 80-06-05: Magnetos - Type: Airworthiness directive - Status: Current - Products: Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A, AEIO-320-E1B, AEIO-320-E2A, AEIO-320-E2B, AEIO-360-A1A, AEIO-360-A1B, AEIO-360-A1B6, AEIO-360-A1C, AEIO-360-A1D, AEIO-360-A1E and 245 more - Effective: March 28, 1980 - Superseded by: Nothing supersedes this AD - Product type: Appliance - Amendment: 39-3718 - Registered aircraft: 121,053 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C43E13FBCB95A098862569EE00658E47.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/80-06-05 ## The airworthiness directive 80-06-05 SLICK ELECTRO, INC.: Amendment 39-3718. Applies to the following Slick magneto models and associated serial and impulse coupling numbers: MAGNETO MODEL NO. (1) SERIAL NO. (1) (2) IMPULSE COUPLING NO. (1) 447 & 447R 9040001 thru 9040049 M2374 662 & 662R 9020462 thru 9070000 M2362 664 & 664R 9040001 thru 9040086 M2370 680 & 680R 9020462 thru 9070000 M2369 4151 & 4151R 9020017 thru 9070000 M1709 4152 & 4152R 9020017 thru 9070000 M1709 4181 & 4181R 9020017 thru 9070000 M1709 4201 & 4201R 9020210 thru 9070000 M3007 4251 & 4251R 9030001 thru 9070000 M3163 4281 & 4281R 9030001 thru 9070000 M3007 4230 & 4230R 9040001 thru 9040197 M3068 6210 8090073 thru 9070000 M3050 6214 8050001 thru 9070000 M3089 (3) M2371, M3100, & M3165 NOTES: (1) Any of the units listed were manufactured subsequent to January 1979. (2) Any magneto serial numbers between and including the lower and upper limits as shown are affected by this AD. (3) These coupling numbers are for parts used as spares and also must be tested. The magneto models as listed above are installed on, but not limited to, the following engines: Lycoming AEIO-360 AEIO-320 IO-320 O-235 O-320 O-360 Continental A-65-8 A-75-8 C-85-8 C-90-8 O-200-A O-300-A, -B, -C, -D O-470-U IO-360-KB IO-470 IO-520-A, -B, -F TSIO-470 TSIO-520-T Compliance is required as indicated unless already accomplished. To prevent a possible magneto failure and subsequent engine or accessory malfunction, accomplish the following: Prior to the next ten (10) hours of aircraft time in service, or within the next thirty (30) calendar days from the date of this AD, whichever occurs first, complete the following comparative hardness test procedures: 1. Remove the impulse coupling magneto(s) from the engine per engine manufacturer's instructions. 2. Remove the impulse coupling assembly from the magneto frame per Slick's maintenance and overhaul instructions. 3. Establish a reference level of acceptable metal hardness by sliding a fine cut mill file over the flat surface of either pawl. The file will slide freely and will only burnish the hard surface of the pawl. 4. By a similar filing action, test for the hardness of each of the two rivet heads. 5. If there is resistance to sliding and material is removed from the rivet head, the rivet has not been heat treated and the coupling assembly must be replaced. Return the defective coupling assembly to a Slick Electro, Inc. distributor. 6. If hardness of the rivet heads and pawls are equivalent, reassemble and identify AD compliance by metal stamping a letter "C" on the Slick insignia located on the side of the magneto identification plate. 7. If the results of the comparative hardness test on the rivet(s) are questionable, the coupling assembly must be replaced. This amendment becomes effective March 28, 1980, as to all persons except those to whom it was made immediately effective by the airmail letter dated February 4, 1980, which contained this amendment. ## Affected data sheets (16) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS E-286](https://openairdocs.org/tcds/E-286): Lycoming Engines; names 61 of 72 models: O-360-C1C, O-360-C1A, O-360-E2AD, O-360-E2BD, O-360-B1A, O-360-A1A, O-360-A1H6, O-360-A1G6… - [TCDS E-274](https://openairdocs.org/tcds/E-274): Lycoming Engines; names 60 of 60 models: O-320-H3BD, O-320-D2G, O-320-E2G, O-320-D3G, O-320-C2B, O-320-E2B, O-320-E2C, O-320-D2H… - [TCDS E-223](https://openairdocs.org/tcds/E-223): Lycoming Engines; names 40 of 43 models: O-235-K2C, O-235-M3C, O-235-A, O-235-F2A, O-235-P2A, O-235-E1, O-235-J2B, O-235-C2B… - [TCDS 1E12](https://openairdocs.org/tcds/1E12): Lycoming Engines; names 24 of 32 models: AEIO-320-E1B, AEIO-320-D2B, IO-320-B1C, IO-320-C1B, IO-320-F1A, IO-320-B1D, AEIO-320-E2A, AEIO-320-E1A… - [TCDS 1E10](https://openairdocs.org/tcds/1E10): Lycoming Engines; names 21 of 89 models: AEIO-360-B1G6, AEIO-360-B1H, AEIO-360-A1B6, AEIO-360-B1B, AEIO-360-A1B, AEIO-360-A1C, AEIO-360-B1F, AEIO-360-B1D… - [TCDS 3E1](https://openairdocs.org/tcds/3E1): Continental Aerospace Technologies, Inc.; names 18 of 19 models: IO-470-H, IO-470-D, IO-470-R, IO-470-J, IO-470-LO, IO-470-M, IO-470-L, IO-470-P… - [TCDS E-233](https://openairdocs.org/tcds/E-233): Continental Aerospace Technologies, Inc.; names 5 of 31 models: C85-8FHJ, C85-8FJ, C85-8J, C85-8, C85-8F - [TCDS E-205](https://openairdocs.org/tcds/E-205): Continental Aerospace Technologies, Inc.; names 4 of 21 models: A-65-8FJ, A-65-8J, A-65-8, A-65-8F - [TCDS E-213](https://openairdocs.org/tcds/E-213): Continental Aerospace Technologies, Inc.; names 4 of 9 models: A75-8, A75-8J, A75-8FJ, A75-8F - [TCDS E-253](https://openairdocs.org/tcds/E-253): Continental Aerospace Technologies, Inc.; names 4 of 8 models: O-300-A, O-300-D, O-300-C, O-300-B - [TCDS 3E3](https://openairdocs.org/tcds/3E3): Continental Aerospace Technologies, Inc.; names 3 of 3 models: TSIO-470-C, TSIO-470-B, TSIO-470-D - [TCDS E-252](https://openairdocs.org/tcds/E-252): Continental Aerospace Technologies, Inc.; names 3 of 15 models: C90-8F, O-200-A, C90-8FJ - [TCDS E-273](https://openairdocs.org/tcds/E-273): Continental Aerospace Technologies, Inc.; names 3 of 21 models: IO-470-C, O-470-U, IO-470-A - [TCDS E5CE](https://openairdocs.org/tcds/E5CE): Continental Aerospace Technologies, Inc.; names 3 of 18 models: IO-520-A, IO-520-B, IO-520-F - [TCDS E1CE](https://openairdocs.org/tcds/E1CE): Continental Aerospace Technologies, Inc.; names 1 of 18 models: IO-360-KB - [TCDS E8CE](https://openairdocs.org/tcds/E8CE): Continental Aerospace Technologies, Inc.; names 1 of 31 models: TSIO-520-T ## Registered aircraft it may apply to (OpenAirDocs) Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment. - Aircraft: 121,053 (0 by airframe model, 121,053 by engine model) - Makers: Cessna 52,511, Piper 26,503, Beech 10,578, Aeronca 3,394, Bellanca 2,228, Mooney 1,799, Taylorcraft 1,694, Grumman American Avn. 1,514, Champion 1,468, Luscombe 1,353 Models with the most aircraft: - [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series): 27,057 aircraft (engine model) - [Continental O-470 series](https://openairdocs.org/engine/continental-o-470-series): 12,779 aircraft (engine model) - [Lycoming O&VO-360 series](https://openairdocs.org/engine/lycoming-o-vo-360-series): 11,931 aircraft (engine model) - [Continental IO-520 series](https://openairdocs.org/engine/continental-io-520-series): 9,486 aircraft (engine model) - [Continental 0-200 series](https://openairdocs.org/engine/continental-0-200-series): 8,790 aircraft (engine model) - [Continental A&C65 series](https://openairdocs.org/engine/continental-a-c65-series): 7,967 aircraft (engine model) - [Continental 0-300 series](https://openairdocs.org/engine/continental-0-300-series): 6,622 aircraft (engine model) - [Lycoming 0-235 series](https://openairdocs.org/engine/lycoming-0-235-series): 6,133 aircraft (engine model) - [Continental C85 series](https://openairdocs.org/engine/continental-c85-series): 4,671 aircraft (engine model) - [Continental I0-470 series](https://openairdocs.org/engine/continental-i0-470-series): 4,499 aircraft (engine model) - [Continental TSIO-520 series](https://openairdocs.org/engine/continental-tsio-520-series): 4,064 aircraft (engine model) - [Continental C90 series](https://openairdocs.org/engine/continental-c90-series): 2,149 aircraft (engine model) - [Continental IO-360 series](https://openairdocs.org/engine/continental-io-360-series): 1,853 aircraft (engine model) - [Lycoming IO-320 series](https://openairdocs.org/engine/lycoming-io-320-series): 1,707 aircraft (engine model) - [Continental A&C75 series](https://openairdocs.org/engine/continental-a-c75-series): 1,504 aircraft (engine model) - [Lycoming O-360 series](https://openairdocs.org/engine/lycoming-o-360-series): 1,023 aircraft (engine model) - [Lycoming 0-360-A1D](https://openairdocs.org/engine/lycoming-0-360-a1d): 968 aircraft (engine model) - [Lycoming AEIO-360 series](https://openairdocs.org/engine/lycoming-aeio-360-series): 882 aircraft (engine model) - [Lycoming O-360-A1A](https://openairdocs.org/engine/lycoming-o-360-a1a): 601 aircraft (engine model) - [Lycoming O-360-A4M](https://openairdocs.org/engine/lycoming-o-360-a4m): 418 aircraft (engine model) All 214 models: https://openairdocs.org/ad/80-06-05/models.md Every aircraft: https://openairdocs.org/ad/80-06-05/aircraft.md Its text cites no advisory circulars or STCs. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.