# Airworthiness Directives; Bombardier Model CL-600-1A11, -2A12, and -2B16 Series Airplanes
> **Rule** · Final rule; request for comments. · Published 1997-11-18 · Effective 1997-12-03 · 62 FR 61436
## Document
- **Document number:** 97-30104
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 62 FR 61436
- **Publication date:** 1997-11-18
- **Effective date:** 1997-12-03
- **FAA docket:** Docket No. 97-NM-285-AD
## Abstract

This amendment adopts a new airworthiness directive (AD) that is applicable to certain Bombardier Model CL-600-1A11, -2A12, and -2B16 series airplanes. This action requires repetitive inspections to detect cracks of a certain bulkhead web of the fuselage at certain locations, and repair, if necessary. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified in this AD are intended to detect and correct cracking in the pressure bulkhead at frame station (FS) 409.00, which could result in uncontrolled depressurization of the airplane and/or reduced structural integrity of the fuselage.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1997/11/18/97-30104/airworthiness-directives-bombardier-model-cl-600-1a11--2a12-and--2b16-series-airplanes)
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