# Proposed AD 99-NM-92-AD: Bombardier Model CL-600-2B19 (Regional Jet Series 100) Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 99-19-39
- Action: Notice of proposed rulemaking (NPRM).
- Published: July 20, 1999, 64 FR 38844
- Comments due: August 19, 1999
- Became: [AD 99-19-39](https://openairdocs.org/ad/99-19-39)
- Docket: 99-NM-92-AD
- FR document: 99-18413
- Official PDF: https://openairdocs.org/files/sha256/63/8d/638de21635385150919733778fd40595fbeb91d40dadb30e980b530004a58efd (from https://www.govinfo.gov/content/pkg/FR-1999-07-20/pdf/99-18413.pdf)
- Federal Register: https://www.federalregister.gov/documents/1999/07/20/99-18413/airworthiness-directives-bombardier-model-cl-600-2b19-regional-jet-series-100-series-airplanes
- Page: https://openairdocs.org/proposed/99-NM-92-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Bombardier Model CL-600- 2B19 (Regional Jet Series 100) series airplanes. This proposal would require removal of the insulation blankets surrounding the emergency overwing exit hatches. This proposal is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by the proposed 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.

## Notices in this docket

- Jul 20, 1999: Notice of proposed rulemaking (NPRM). (first notice), FR document 99-18413, comments due Aug 19, 1999 (https://www.federalregister.gov/documents/1999/07/20/99-18413/airworthiness-directives-bombardier-model-cl-600-2b19-regional-jet-series-100-series-airplanes)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.