# Proposed AD 98-SW-02-AD: Eurocopter France Model SA. 315B Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 98-12-21
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 21, 1998, 63 FR 19670
- Comments due: May 21, 1998
- Became: [AD 98-12-21](https://openairdocs.org/ad/98-12-21)
- Docket: 98-SW-02-AD
- FR document: 98-10465
- Official PDF: https://openairdocs.org/files/sha256/30/2f/302f886ec7e261774a5d3d3af9b05608771673771782d0187ad886446a03a758 (from https://www.govinfo.gov/content/pkg/FR-1998-04-21/pdf/98-10465.pdf)
- Federal Register: https://www.federalregister.gov/documents/1998/04/21/98-10465/airworthiness-directives-eurocopter-france-model-sa-315b-helicopters
- Page: https://openairdocs.org/proposed/98-SW-02-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to Eurocopter France Model SA. 315B helicopters. This proposal would require an initial and repetitive visual inspections and modification, if necessary, of the horizontal stabilizer spar tube (spar tube). This proposal is prompted by an in- service report of fatigue cracks that initiated from corrosion pits. The actions specified by the proposed AD are intended to prevent fatigue failure of the spar tube, separation and impact of the horizontal stabilizer with the main or tail rotor and subsequent loss of control of the helicopter.

## Notices in this docket

- Apr 21, 1998: Notice of proposed rulemaking (NPRM). (first notice), FR document 98-10465, comments due May 21, 1998 (https://www.federalregister.gov/documents/1998/04/21/98-10465/airworthiness-directives-eurocopter-france-model-sa-315b-helicopters)

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