AD 2013-03-08 Airworthiness Directives; Bombardier, Inc. Airplanes

(1) This AD applies to the airplane models specified in paragraphs (c)(1)(i), (c)(1)(ii), (c)(1)(iii), and (c)(1)(iv) of this AD, certificated in any category. (i) Bombardier, Inc. Model CL-600-1A11 (CL-600), serial numbers 1004 through 1085 inclusive. (ii) Bombardier, Inc. Model CL-600-2A12 (CL-601), serial numbers 3001 through 3066 inclusive. (iii) Bombardier, Inc. Model CL-600-2B16 (CL-601-3A and CL-601-3R Variants), serial numbers 5001 through 5194 inclusive. (iv) Bombardier, Inc. Model CL-600-2B16 (CL-604 Variants), serial numbers 5301 through 5665 inclusive, and 5701 and subsequent. (2) This AD requires revisions to certain operator maintenance documents to include new inspections. Compliance with these inspections is required by 14 CFR 91.403(c). For airplanes that have been previously modified, altered, or repaired in the areas addressed by these inspections, the operator may not be able to accomplish the inspections described in the revisions. In this situation, to comply with 14 CFR 91.403(c), the operator must request approval for an alternative method of compliance according to paragraph (j) of this AD. The request should include a description of changes to the required inspections that will ensure the continued damage tolerance of the affected structure. The FAA has provided guidance for this determination in FAA Advisory Circular (AC) 25.1529-1A, dated November 20, 2007 ( http://rgl/Regulatory_and_Guidance_Library/rgAdvisoryCircular.nsf/0/E4111B5537E0B345862573B0006FA23B?OpenDocument ).

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

Within 60 days after the effective date of this AD, revise the maintenance program to incorporate the applicable information specified in paragraphs (g)(1) through (g)(4) of this AD. Note 1 to paragraph (g) of this AD: The maintenance program revision required by paragraph (g) of this AD may be done by inserting a copy of Bombardier Temporary Revision (TR) 5-151, TR 5-250, TR 5-261, and TR 5-2-47 or TR 5-2-9, all dated May 31, 2011, into the applicable TLMC manual. When the applicable TR has been included in general revisions of the TLMC manual, the general revisions may be inserted in the TLMC manual, provided the relevant information in the general revision is identical to that in the applicable TR specified in paragraphs (g)(1) through (g)(4) of this AD. (1) For Model CL-600-1A11 (CL-600) airplanes: Task 53-10-00-198, Torque Box, specified in Canadair Challenger TR 5-151, dated May 31, 2011, to the Canadair Challenger TLMC Manual, PSP 605. (2) For Model CL-600-2A12 (CL-601 Variant) airplanes: Task 53-10-00-198, Engine Support Beam, specified in Canadair Challenger TR 5-250, dated May 31, 2011, to the Canadair Challenger TLMC Manual, PSP 601-5. (3) For Model CL-600-2B16 (CL-601-3A and CL-601-3B Variant) airplanes: Task 53- 10-00-198, Engine Support Beam, specified in Canadair Challenger TR 5-261, dated May 31, 2011, to the Canadair Challenger TLMC Manual, PSP 601A-5. (4) For Model CL-600-2B16 (CL-604 Variant) airplanes: Task 53-30-00-155, Detailed Inspection of the Engine Support Beam, specified in Bombardier Challenger 604 TR 5-2-47, dated May 31, 2011, to the Bombardier Challenger 604 TLMC Manual; or Task 53-30-00-155, Detailed Inspection of the Engine Support Beam, specified in Bombardier Challenger 605 TR 5-2-9, dated May 31, 2011, to the Bombardier Challenger 605 TLMC Manual.

This AD was prompted by reports of cracking found on the upper and lower Web of the engine support beam. We are issuing this AD to detect and correct fatigue cracking of the engine support beam, which could result in failure of the engine support beam and affect the structural integrity of the airplane.

None.