# Airworthiness Directives; Eurocopter France Model EC 155 B and B1 Helicopters
> **Rule** · Final rule; request for comments. · Published 2004-06-14 · Effective 2004-06-29 · 69 FR 32857
## Document
- **Document number:** 04-12905
- **Category:** airworthiness
- **Manufacturer:** Eurocopter France Model EC 155 B and B1
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 69 FR 32857
- **Publication date:** 2004-06-14
- **Effective date:** 2004-06-29
- **FAA docket:** Docket No. 2004-SW-05-AD
## Abstract

This amendment adopts a new airworthiness directive (AD) for Eurocopter France (Eurocopter) Model EC 155 B and B1 helicopters. This action requires inspecting each main rotor blade (blade) for a crack in the blade tip cap mounting bracket (tenon), measuring the vertical clearance between each blade assembly and a straight edge at the blade-to-tip cap junction, and replacing the blade if a crack is found or if the measured distance is not within certain specifications. This amendment is prompted by the discovery of a crack in a tenon. This condition, if not detected, could result in loss of the tip cap, which could lead to severe vibration and loss of control of the helicopter.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2004/06/14/04-12905/airworthiness-directives-eurocopter-france-model-ec-155-b-and-b1-helicopters)
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