# Airworthiness Directives; Eurocopter France Model SE.3160, SA.315B, SA.316B, SA.316C, and SA.319B Helicopters
> **Rule** · Final rule; request for comments. · Published 1999-10-14 · Effective 1999-10-29 · 64 FR 55624
## Document
- **Document number:** 99-26711
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 64 FR 55624
- **Publication date:** 1999-10-14
- **Effective date:** 1999-10-29
- **FAA docket:** Docket No. 99-SW-29-AD
## Abstract

This amendment adopts a new airworthiness directive (AD) applicable to Eurocopter France Model SE.3160, SA.315B, SA.316B, SA.316C, and SA.319B helicopters with a main gearbox (MGB), all part numbers, not modified in accordance with MOD 072241. This action requires, prior to further flight and thereafter prior to the first flight of each day, inspecting the MGB magnetic plug for metal particles. This AD also requires inspecting the MGB oil filter for metal particles. This amendment is prompted by the failure of a bevel wheel gear attachment bolt (bolt) during testing of an SA.315B MGB. The actions specified in this AD are intended to detect a condition that could cause bolt failure and damage to the MGB, resulting in loss of drive to the main rotor and subsequent loss of control of the helicopter.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1999/10/14/99-26711/airworthiness-directives-eurocopter-france-model-se3160-sa315b-sa316b-sa316c-and-sa319b-helicopters)
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