# Airworthiness Directives; Teledyne Continental Motors (Formerly Bendix) S-20, S-1200, D-2000, and D-3000 Series Magnetos
> **Rule** · Final rule. · Published 2005-06-14 · Effective 2005-07-19 · 70 FR 34336
## Document
- **Document number:** 05-11610
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 70 FR 34336
- **Publication date:** 2005-06-14
- **Effective date:** 2005-07-19
- **FAA docket:** Docket No. 93-ANE-07-AD
## Abstract

The FAA is superseding an existing airworthiness directive (AD) for Teledyne Continental Motors (TCM) (formerly Bendix) S-20, S- 1200, D-2000, and D-3000 series magnetos equipped with impulse coupling assemblies. That AD currently requires replacing riveted-impulse coupling assemblies and snap-ring coupling assemblies, which are worn beyond limits, with serviceable riveted-impulse coupling assemblies or snap-ring impulse coupling assemblies. This ad requires a reduced inspection interval for magnetos with riveted-impulse coupling assemblies installed on certain Lycoming engine models. This AD does not lower the inspection interval for magnetos with snap-ring impulse coupling assemblies. This AD also limits the applicability to certain Lycoming engine models. This AD results from data provided by the manufacturer that shows a need to reduce the inspection intervals for riveted-impulse coupling assemblies used on certain Lycoming engine models. We are issuing this AD to prevent failure of the magneto impulse coupling assembly and possible engine failure.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2005/06/14/05-11610/airworthiness-directives-teledyne-continental-motors-formerly-bendix-s-20-s-1200-d-2000-and-d-3000)
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