AD 2010-10-26

You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.

For airplanes having serial numbers (S/Ns) as identified in the service bulletins specified in Table 1 of this AD, as applicable: Within 500 flight hours or 12 months after August 16, 2007 (the effective date AD 2007-14-02), whichever occurs first, inspect to determine the manufacturer part numbers (P/Ns) and serial numbers of the selector valves of the nose landing gear (NLG) and nose gear door. A review of airplane maintenance records is acceptable in lieu of this inspection if the serial numbers of the selector valves can be conclusively determined from that review. For any subject selector valve having Tactair Fluid Controls P/N 750006000 and a S/N from 0001 through 0767 inclusive, before further flight, do related investigative (including a general visual inspection for proper installation of the lock wire of the end cap) and corrective actions; in accordance with the applicable service bulletin identified in Table 1 of this AD. After the effective date of this AD, use only the applicable service bulletin specified in Table 2 of this AD.

Note 1: Operators should be aware that selector valves having Bombardier P/N 601R75146-1 may be supplied by different manufacturers and have different manufacturer part numbers. Only airplanes having selector valves manufactured by Tactair Fluid Controls, having P/N 750006000, are subject to the investigative and corrective actions specified in paragraph (g) of this AD.

Note 2: For the purposes of this AD, a general visual inspection is: “A visual examination of an interior or exterior area, installation, or assembly to detect obvious damage, failure, or irregularity. This level of inspection is made from within touching distance unless otherwise specified. A mirror may be necessary to ensure visual access to all surfaces in the inspection area. This level of inspection is made under normally available lighting conditions such as daylight, hangar lighting, flashlight, or droplight and may require removal or opening of access panels or doors. Stands, ladders, or platforms may be required to gain proximity to the area being checked.”

Note 3: The service bulletins identified in Table 1 of this AD refer to Tactair Fluid Controls Service Bulletin SB750006000-1, Revision A, dated September 6, 2005, as an additional source of guidance for doing the related investigative and corrective actions required by this AD.

Actions accomplished before August 16, 2007, in accordance with Bombardier Service Bulletin 604-32-021, Revision 01, dated February 20, 2006 (for Model CL-600-2B16 (CL-604) airplanes), are considered acceptable for compliance with the corresponding actions specified in paragraph (g) of this AD.

(i) Unless already done, do the following actions.

(1) Within 250 flight hours or within 6 months after the effective date of this AD, whichever occurs first: Do an inspection of the selector valve of the NLG and the door selector valve of the NLG to determine if P/N 601R75146-1 (Kaiser Fluid Technologies P/N 750006000) is installed, in accordance with the Accomplishment Instructions of the applicable service bulletin specified in Table 3 of this AD. Doing the inspection required by this paragraph terminates the inspection required by paragraph (g) of this AD.

(2) If, during any inspection required by paragraph (i)(1) of this AD, any selector valve having P/N 601R75146-1 (Kaiser Fluid Technologies P/N 750006000) and having a S/N from 0001 through 2126 inclusive without a suffix “T” is found, and the valve is not ink-stamped with the marking “SB750006000-1”: Before further flight, do a general visual inspection for proper installation of the lock wire of the end cap, and replace it with a serviceable selector valve as applicable, in accordance with the Accomplishment Instructions of the applicable service bulletin specified in Table 3 of this AD.

(3) Doing the actions before the effective date of this AD in accordance with the applicable service bulletin specified in Table 4 of this AD is acceptable for compliance with the corresponding actions specified in this AD.

Note 4: This AD differs from the MCAI and/or service information as follows: No differences.