# Airworthiness Directives; Bombardier Model CL-600-2B19 (Regional Jet Series 100) Series Airplanes
> **Rule** · Final rule. · Published 1999-09-22 · Effective 1999-10-27 · 64 FR 51192
## Document
- **Document number:** 99-24200
- **Category:** airworthiness
- **Manufacturer:** Bombardier Model CL-600-2B19 (Regional Jet Series 100) Series
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 64 FR 51192
- **Publication date:** 1999-09-22
- **Effective date:** 1999-10-27
- **FAA docket:** Docket No. 99-NM-92-AD
## Abstract

This amendment adopts a new airworthiness directive (AD), applicable to certain Bombardier Model CL-600-2B19 (Regional Jet Series 100) series airplanes, that requires removal of the insulation blankets surrounding the emergency overwing exit hatches. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to prevent the freezing of moisture entrapped in the fiberglass/foam insulation installed on the fuselage structure between the overwing exit door and the fuselage door frame and intercostal, which could interfere with the opening of the overwing emergency exit hatches during an emergency evacuation of the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1999/09/22/99-24200/airworthiness-directives-bombardier-model-cl-600-2b19-regional-jet-series-100-series-airplanes)
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