# Airworthiness Directives; Bombardier Model CL-600-1A11 (CL-600), CL-600-2A12 (CL-601), and CL-600-2B16 (CL-601-3A, CL-601-3R, and CL-604) Series Airplanes
> **Rule** · Final rule; request for comments. · Published 2000-12-04 · Effective 2000-12-19 · 65 FR 75605
## Document
- **Document number:** 00-30020
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 65 FR 75605
- **Publication date:** 2000-12-04
- **Effective date:** 2000-12-19
- **FAA docket:** Docket No. 2000-NM-368-AD
## Abstract

This amendment adopts a new airworthiness directive (AD) that is applicable to certain Bombardier Model CL-600-1A11 (CL-600), CL-600- 2A12 (CL-601), and CL-600-2B16 (CL-601-3A, CL-601-3R, and CL-604) series airplanes. This action requires installation of protection shields in the wheel bay of the main landing gear (MLG). This action is necessary to prevent water, ice or slush accumulation on the aileron quadrants and/or control cable pulleys in the wheel bay of the MLG during ground roll. Such water, ice or slush accumulation could subsequently freeze during the climb to cruise altitude and cause stiffness in the aileron controls, which could result in reduced controllability of the airplane. This action is intended to address the identified unsafe condition.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2000/12/04/00-30020/airworthiness-directives-bombardier-model-cl-600-1a11-cl-600-cl-600-2a12-cl-601-and-cl-600-2b16)
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