AD/CL-600/109 - Nose Landing Gear Selector Valve (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-600/109 Nose Landing Gear Selector Valve 7/2009

Applicability: Bombardier Inc. Model CL-600-2B19, Serial Numbers (S/N) 7003 and subsequent. Requirement: 1. Check the S/N and identification markings on both the nose landing gear (NLG) selector valve and NLG door selector valve that are installed on the aircraft:

a. If either or both selector valve S/Ns is in the range 0001 through 2126, and there is no suffix "T" or marking "SB750006000-1" on the valve, proceed to Requirement 2 of this AD.

b. If both selector valves are identified with one or more of the following S/Ns or identification markings, no further action is required. Compliance with this AD is complete:

- S/N outside the range 0001 through 2126;

- suffix "T";

- marking "SB750006000-1".

2. For each NLG selector valve and NLG door selector valve installed on the aircraft, that has a S/N in the range 0001 through 2126 but is not identified with suffix "T" or marking "SB750006000-1":