# Airworthiness Directives; Eurocopter France Model AS-350B, B1, B2, B3, BA, and D, and AS-355E, F, F1, F2, and N Helicopters
> **Rule** · Final rule; request for comments. · Published 1999-11-30 · Effective 1999-12-15 · 64 FR 66762
## Document
- **Document number:** 99-30797
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 64 FR 66762
- **Publication date:** 1999-11-30
- **Effective date:** 1999-12-15
- **FAA docket:** Docket No. 99-SW-41-AD
## Abstract

This amendment supersedes an existing airworthiness directive (AD), applicable to Eurocopter France Model AS-350B, B1, B2, B3, BA, and D, and AS-355E, F, F1, F2, and N helicopters, that requires inspecting certain versions of the tail rotor spider plate bearing (bearing) for the proper rotational torque, axial play, and any brinelling of the bearing. This amendment has the same inspection requirements as the current AD. Also, this AD expands the applicability to include additional part numbers (P/N's) and reduces the initial and recurring inspection compliance times. This amendment is prompted by additional reports of deterioration of the bearing. The actions specified by this AD are intended to prevent seizure of the bearing, loss of tail rotor control, and subsequent loss of control of the helicopter.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1999/11/30/99-30797/airworthiness-directives-eurocopter-france-model-as-350b-b1-b2-b3-ba-and-d-and-as-355e-f-f1-f2-and-n)
---
*MORVS · CC0 1.0*