# Proposed AD 97-SW-06-AD: Eurocopter France Model SA 330F, G, and J Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 98-13-40
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 5, 1998, 63 FR 10783
- Comments due: April 6, 1998
- Became: [AD 98-13-40](https://openairdocs.org/ad/98-13-40)
- Docket: 97-SW-06-AD
- FR document: 98-5734
- Official PDF: https://openairdocs.org/files/sha256/2e/0d/2e0df5ee720e113030b9e9b44bece82870f3768fdbf9f3a3a4253031e5c00a31 (from https://www.govinfo.gov/content/pkg/FR-1998-03-05/pdf/98-5734.pdf)
- Federal Register: https://www.federalregister.gov/documents/1998/03/05/98-5734/airworthiness-directives-eurocopter-france-model-sa-330f-g-and-j-helicopters
- Page: https://openairdocs.org/proposed/97-SW-06-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to Eurocopter France Model SA 330F, G, and J helicopters. This proposal would require verifying the torque on the nut that secures the two transformer-rectifiers' common ground; and subsequently installing a modification to separate the grounds of the two transformer-rectifiers. This proposal is prompted by a report from the airworthiness authority of France about an unsafe condition resulting from the loss of the common ground of the two transformer- rectifiers. The actions specified by the proposed AD are intended to prevent loss of the common ground of the two transformer-rectifiers, which could result in a complete electrical failure (essential and secondary), loss of electrically-powered instrumentation, and subsequent loss of control of the helicopter.

## Notices in this docket

- Mar 5, 1998: Notice of proposed rulemaking (NPRM). (first notice), FR document 98-5734, comments due Apr 6, 1998 (https://www.federalregister.gov/documents/1998/03/05/98-5734/airworthiness-directives-eurocopter-france-model-sa-330f-g-and-j-helicopters)

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