# Proposed AD 99-NM-166-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 99-26-16
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 27, 1999, 64 FR 57798
- Comments due: November 26, 1999
- Became: [AD 99-26-16](https://openairdocs.org/ad/99-26-16)
- Docket: 99-NM-166-AD
- FR document: 99-28082
- Official PDF: https://openairdocs.org/files/sha256/9d/24/9d2468e8348220c0c2c33d297099477ca89cccbacbd5c592494f6c428b8e8166 (from https://www.govinfo.gov/content/pkg/FR-1999-10-27/pdf/99-28082.pdf)
- Federal Register: https://www.federalregister.gov/documents/1999/10/27/99-28082/airworthiness-directives-bombardier-model-cl-600-1a11-cl-600-cl-600-2a12-cl-601-and-cl-600-2b16
- Page: https://openairdocs.org/proposed/99-NM-166-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is 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. For certain airplanes, this proposal would require removing the hydraulic tube assemblies from the main landing gear (MLG) bay, installing new re-routed hydraulic tube assemblies, and repositioning a fuel line, as applicable. For certain other airplanes, this proposal would require a general visual inspection to determine the routing of certain hydraulic and fuel lines, and repair, if necessary. 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 damage to hydraulic and fuel lines resulting from failure of an MLG, which could cause a fire in the MLG wheel well.

## Notices in this docket

- Oct 27, 1999: Notice of proposed rulemaking (NPRM). (first notice), FR document 99-28082, comments due Nov 26, 1999 (https://www.federalregister.gov/documents/1999/10/27/99-28082/airworthiness-directives-bombardier-model-cl-600-1a11-cl-600-cl-600-2a12-cl-601-and-cl-600-2b16)

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