# AD 81-16-05: Magnetos

- Type: Airworthiness directive
- Status: Current
- Products: Lycoming Engines AEIO-320-E1B, AEIO-320-E2B, AEIO-360-B1G6, AEIO-360-H1A, O-235-C2C, O-235-H2C, O-235-K2C, O-235-L2C, O-320-A2D, O-320-D1D, O-320-D2G, O-320-D2J and 225 more
- Effective: August 6, 1981
- Superseded by: Nothing supersedes this AD
- Product type: Appliance
- Amendment: 39-4173
- Registered aircraft: 111,970 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E4BD81E7943D55BB86256A3900683165.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/81-16-05

## The airworthiness directive

81-16-05 SLICK ELECTRO, INC.: Amendment 39-4173. Applies to the following Slick Magneto models and serial numbers:

Magneto Model Numbers*

4250, 4250R 4251, 4251R 4216, 4216R 4230, 4230R 4252, 4252R 6210, 6210R 4201, 4201R 4281, 4281R 6214, 6214R

*All 4200 series magnetos use Slick Coil part number M-3114

All 6200 series magnetos use Slick Coil part number M-3009

Serial Numbers**

8100000-8109999 9050000-9059999 9110000-9119999 8110000-8119999 9060000-9069999 9120000-9129999 8120000-8129999 9070000-9079999 0010000-0019999 9010000-9019999 9080000-9089999 0020000-0029999 9020000-9029999 9090000-9099999 0030000-0039999 9030000-9039999 9100000-9109999 0040000-0049999 9040000-9049999

**Year and month of manufacture is given by first three numbers of serial number; for example 9032576 was manufactured March 1979.

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

O-235-C2C O-320-D3G O-360-A4M O-235-H2C O-320-E1J O-360-C1E O-235-K2C O-320-E2D O-360-C1F O-235-L2C O-320-E2G O-360-C2E O-320-A2D O-320-E3D O-360-F1A6 O-320-D1D AEIO-320-E1B AEIO-360-B1G6 O-320-D2G AEIO-320-E2B AEIO-360-H1A O-320-D2J O-360-A4K

To prevent magneto failure due to cracked coil, accomplish the following within the next 25 hours time in service after the effective date of this AD unless already accomplished:

A. Remove magneto and visually inspect coil for cracks in accordance with Slick Electro, Inc. Service Bulletin No. 1-81 revised June 29, 1981.

B. Replace cracked coils and coils with less than 250 hours time in service with serviceable coils manufactured prior to October 1, 1978, or subsequent to April 30, 1980. The date of manufacture is stamped on each coil.

C. Accomplishment of this AD should be indicated by stampingthe letter "C" into the metal name plate following the last digit of the magneto serial number, as well as the appropriate logbook entry.

Alternate methods of compliance with this AD must be approved by the Chief, Engineering and Manufacturing Branch, FAA Great Lakes Region.

This amendment becomes effective August 6, 1981.

## Affected data sheets (17) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS E-233](https://openairdocs.org/tcds/E-233): Continental Aerospace Technologies, Inc.; names 31 of 31 models: C85-14F, C85-12FH, C85-12, C85-12F, C75-8F, C75-15, C75-12FHJ, C75-8FHJ…
- [TCDS E8CE](https://openairdocs.org/tcds/E8CE): Continental Aerospace Technologies, Inc.; names 30 of 31 models: TSIO-520-BB, TSIO-520-B, TSIO-520-P, TSIO-520-R, TSIO-520-AF, TSIO-520-M, TSIO-520-J, TSIO-520-A…
- [TCDS E9CE](https://openairdocs.org/tcds/E9CE): Continental Aerospace Technologies, Inc.; names 24 of 28 models: TSIO-360-SB, TSIO-360-JB, TSIO-360-FB, TSIO-360-HB, TSIO-360-H, TSIO-360-NB, TSIO-360-GB, TSIO-360-E…
- [TCDS E-205](https://openairdocs.org/tcds/E-205): Continental Aerospace Technologies, Inc.; names 21 of 21 models: A-65-14F, A-65-8FJ, A-65-9F, A-65-14FJ, A-65-9J, A-65-12F, A-65-3, A-65-9…
- [TCDS E-273](https://openairdocs.org/tcds/E-273): Continental Aerospace Technologies, Inc.; names 21 of 21 models: O-470-G-CI, O-470-T, O-470-B-CI, O-470-N, O-470-R, IO-470-C, O-470-H, O-470-A…
- [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 E5CE](https://openairdocs.org/tcds/E5CE): Continental Aerospace Technologies, Inc.; names 17 of 18 models: IO-520-NB, IO-520-BA, IO-520-A, IO-520-B, IO-520-P, IO-520-C, IO-520-L, IO-520-N…
- [TCDS E1CE](https://openairdocs.org/tcds/E1CE): Continental Aerospace Technologies, Inc.; names 16 of 18 models: IO-360-A, IO-360-G, IO-360-B, IO-360-C, IO-360-ES, IO-360-H, IO-360-JB, IO-360-D…
- [TCDS E-252](https://openairdocs.org/tcds/E-252): Continental Aerospace Technologies, Inc.; names 15 of 15 models: C90-8F, O-200-A, C90-12F, C90-12FP, O-200-C, C90-8FJ, C90-14FJ, C90-12FH…
- [TCDS E-213](https://openairdocs.org/tcds/E-213): Continental Aerospace Technologies, Inc.; names 9 of 9 models: A75-3, A75-9, A75-6J, A75-8, A75-9J, A75-6, A75-8J, A75-8FJ…
- [TCDS E-274](https://openairdocs.org/tcds/E-274): Lycoming Engines; names 9 of 60 models: O-320-D2G, O-320-E2G, O-320-D3G, O-320-D2J, O-320-E3D, O-320-E1J, O-320-E2D, O-320-D1D…
- [TCDS E-269](https://openairdocs.org/tcds/E-269): Continental Aerospace Technologies, Inc.; names 8 of 8 models: O-470-11, O-470-15, O-470-11B-CI, O-470-13, O-470-11-CI, O-470-11B, O-470-4, O-470-13A
- [TCDS E-286](https://openairdocs.org/tcds/E-286): Lycoming Engines; names 6 of 72 models: O-360-C2E, O-360-C1F, O-360-A4K, O-360-A4M, O-360-C1E, O-360-F1A6
- [TCDS E-223](https://openairdocs.org/tcds/E-223): Lycoming Engines; names 4 of 43 models: O-235-K2C, O-235-C2C, O-235-L2C, O-235-H2C
- [TCDS 1E10](https://openairdocs.org/tcds/1E10): Lycoming Engines; names 2 of 89 models: AEIO-360-B1G6, AEIO-360-H1A
- [TCDS 1E12](https://openairdocs.org/tcds/1E12): Lycoming Engines; names 2 of 32 models: AEIO-320-E1B, AEIO-320-E2B
- [TCDS E-281](https://openairdocs.org/tcds/E-281): Continental Aerospace Technologies, Inc.; names 1 of 2 models: O-470-2

## 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: 111,970 (0 by airframe model, 111,970 by engine model)
- Makers: Cessna 46,386, Piper 26,283, Beech 10,647, Aeronca 3,418, Mooney 2,412, Bellanca 1,905, Taylorcraft 1,700, Grumman American Avn. 1,501, Luscombe 1,367, Champion 1,324

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)
- [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 TSIO-360 series](https://openairdocs.org/engine/continental-tsio-360-series): 1,900 aircraft (engine model)
- [Continental IO-360 series](https://openairdocs.org/engine/continental-io-360-series): 1,885 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 AEIO-360 series](https://openairdocs.org/engine/lycoming-aeio-360-series): 882 aircraft (engine model)
- [Lycoming O-360-A4M](https://openairdocs.org/engine/lycoming-o-360-a4m): 418 aircraft (engine model)
- [Continental IO-360-ES](https://openairdocs.org/engine/continental-io-360-es): 401 aircraft (engine model)
- [Continental O-200 series](https://openairdocs.org/engine/continental-o-200-series): 329 aircraft (engine model)
- [Continental O-200A](https://openairdocs.org/engine/continental-o-200a): 295 aircraft (engine model)

All 188 models: https://openairdocs.org/ad/81-16-05/models.md
Every aircraft: https://openairdocs.org/ad/81-16-05/aircraft.md

Its text cites no advisory circulars or STCs.

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