AD/CL-600/114 - Landing Gear Alternate Extension System (Cth)

AIRWORTHINESS DIRECTIVE For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.001(1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

Bombardier (Canadair) CL-600 (Challenger) Series Aeroplanes AD/CL-600/114 Landing Gear Alternate Extension System 8/2009

Applicability: Bombardier Inc. Models CL-600-2C10 (Regional Jet Series 700 and 701) - Serial Numbers 10003 through 10216 CL-600-2D15 (Regional Jet Series 705) and CL-600-2D24 (Regional Jet Series 900) - Serial Numbers 15001 through 15039. Requirement: 1. Bypass Valve - Clevis Replacement:

Replace the existing clevis with a new clevis, P/N 2323H037, in accordance with Part A of the Accomplishment Instructions in Alert Service Bulletin (ASB) A670BA-32-022, Revision A, dated 1 May 2009, or later revisions approved by the Chief, Continuing Airworthiness, Transport Canada.

Replacement of the existing clevis in accordance with Part A of the original issue, dated 8 November 2007, of ASB A670BA-32-022 also meets the intent of Requirement 1 of this AD.

It is not necessary to replace the clevis if Part III of this AD has already been accomplished.

2. Downlock Assist Valve - Clevis Replacement:

Replace the existing clevis with a new clevis, Part Number 2323H037, in accordance with Part B of the Accomplishment Instructions in ASB A670BA-32-022, Revision A, or later revisions approved by the Chief, Continuing Airworthiness, Transport Canada.