# Proposed AD 2003-NM-175-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 2004-09-37
- Products: Bombardier
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: February 13, 2004, 69 FR 7170
- Comments due: March 15, 2004
- Became: [AD 2004-09-37](https://openairdocs.org/ad/2004-09-37)
- Docket: 2003-NM-175-AD
- FR document: 04-3133
- Official PDF: https://openairdocs.org/files/sha256/ef/7b/ef7bbb34cf0e4e4c11eda5390b61af58e172532e8a86cf686ba37ead55e51919 (from https://www.govinfo.gov/content/pkg/FR-2004-02-13/pdf/04-3133.pdf)
- Federal Register: https://www.federalregister.gov/documents/2004/02/13/04-3133/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/C9AAF30E6A73362186256E3900522457.0001
- Page: https://openairdocs.org/proposed/2003-NM-175-AD

## Summary

This document proposes the supersedure of an existing airworthiness directive (AD), applicable to certain Bombardier transport category airplanes, that currently requires a detailed inspection to detect cracks of the vane brackets of the inboard flap actuator beam, and follow-on repetitive detailed inspections or corrective actions, as applicable. That AD also provides for two optional terminating actions for the detailed inspection(s). This action would require performing one or the other of the terminating actions. The actions specified by the proposed AD are intended to detect and correct gaps between the flap vane bracket and the adjacent lower skin and between the flap vane bracket and vane actuator beam, and premature cracking of the flap vane brackets, which could result in failure of the flap vane bracket(s) when the flaps are extended and the flap vane is aerodynamically loaded, and consequent reduced controllability of the airplane. This action is intended to addressthe identified unsafe condition.

## Notices in this docket

- Feb 13, 2004: Notice of proposed rulemaking (NPRM). (first notice), FR document 04-3133, comments due Mar 15, 2004 (https://www.federalregister.gov/documents/2004/02/13/04-3133/airworthiness-directives-bombardier-model-cl-600-1a11-cl-600-cl-600-2a12-cl-601-and-cl-600-2b16)

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