# Airworthiness Directives; Eurocopter France Model AS350B, B1, B2, B3, BA, and D Helicopters
> **Rule** · Final rule. · Published 2003-08-06 · Effective 2003-09-10 · 68 FR 46443
## Document
- **Document number:** 03-19575
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 68 FR 46443
- **Publication date:** 2003-08-06
- **Effective date:** 2003-09-10
- **FAA docket:** Docket No. 2003-SW-02-AD
## Abstract

This amendment adopts a new airworthiness directive (AD) for the specified Eurocopter France (ECF) model helicopters that requires replacing the main gearbox (MGB) opening neoprene cowling seals (seals) with airworthy glass/silicone seals. This amendment is prompted by the discovery that neoprene seals currently installed on the MGB opening cowlings do not provide the fire protection required by the airworthiness standards. The actions specified by this AD are intended to prevent a fire in the engine compartment from reaching the MGB compartment that contains parts that are not fire resistant and subsequent loss of control of the helicopter.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2003/08/06/03-19575/airworthiness-directives-eurocopter-france-model-as350b-b1-b2-b3-ba-and-d-helicopters)
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