# Proposed AD 2001-NM-267-AD: 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

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 97-24-02 R1
- Products: Bombardier
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 21, 2003, 68 FR 60047
- Comments due: November 20, 2003
- Became: [AD 97-24-02 R1](https://openairdocs.org/ad/97-24-02-R1)
- Docket: 2001-NM-267-AD
- FR document: 03-26469
- Official PDF: https://openairdocs.org/files/sha256/2d/e2/2de20039b155780bf796e5f0aefd2e448649fc7dfbf8968ab9d8f00567ab6494 (from https://www.govinfo.gov/content/pkg/FR-2003-10-21/pdf/03-26469.pdf)
- Federal Register: https://www.federalregister.gov/documents/2003/10/21/03-26469/airworthiness-directives-bombardier-model-cl-600-1a11-cl-600-cl-600-2a12-cl-601-and-cl-600-2b16
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/70A1FFA06073B0C386256DC6004AE2AE.0001
- Page: https://openairdocs.org/proposed/2001-NM-267-AD

## Summary

This document proposes to revise an existing airworthiness directive (AD), 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, that currently requires repetitive inspections to find cracks of a certain bulkhead web of the fuselage at certain locations, and repair if necessary. The actions specified by that AD are intended to prevent 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. This action would provide an optional terminating modification for certain airplanes. This action is intended to address the identified unsafe condition.

## Notices in this docket

- Oct 21, 2003: Notice of proposed rulemaking (NPRM). (first notice), FR document 03-26469, comments due Nov 20, 2003 (https://www.federalregister.gov/documents/2003/10/21/03-26469/airworthiness-directives-bombardier-model-cl-600-1a11-cl-600-cl-600-2a12-cl-601-and-cl-600-2b16)

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