# Airworthiness Directives; Eurocopter France Model SA 365N, N1 and AS 365N2 Helicopters
> **Rule** · Final rule. · Published 1998-04-10 · 63 FR 17676
## Document
- **Document number:** 98-9476
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 63 FR 17676
- **Publication date:** 1998-04-10
- **FAA docket:** Docket No. 97-SW-21-AD
## Abstract

This amendment adopts a new airworthiness directive (AD) applicable to Eurocopter France (Eurocopter) Model SA-365N, N1 and AS- 365N2 helicopters that requires inspections of the main gearbox suspension diagonal cross-member (diagonal cross-member) for cracks, and removal of the diagonal cross-member and replacement with an airworthy diagonal cross-member if any crack is found. This amendment is prompted by several reports of the discovery of cracks in diagonal cross-members. The actions specified by this AD are intended to prevent failure of the diagonal cross-member which could cause the main gearbox to pivot, resulting in severe vibrations and a subsequent forced landing.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1998/04/10/98-9476/airworthiness-directives-eurocopter-france-model-sa-365n-n1-and-as-365n2-helicopters)
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