Airworthiness Directive · Amendment 39-17754 · Wings
Bombardier, Inc. Airplanes
This AD applies to the Bombardier, Inc. airplanes identified in paragraphs (c)(1) through (c)(3) of this AD, certificated in any category.
(1) Bombardier, Inc. Model CL-600-1A11 (CL-600) airplanes, having serial numbers (S/Ns) 1004 through 1085 inclusive.
(2) Bombardier, Inc. Model CL-600-2A12 (CL-601) airplanes, having S/Ns 3001 through 3066 inclusive.
(3) Bombardier, Inc. Model CL-600-2B16 (CL-601-3A, CL-601-3R, & CL-604 Variants) airplanes, having S/Ns 5001 through 5194 inclusive, 5301 through 5665 inclusive, and 5701 through 5920 inclusive.
We are adopting a new airworthiness directive (AD) for certain Bombardier, Inc. Model CL-600-1A11 (CL-600), CL-600-2A12 (CL-601), and CL-600-2B16 (CL-601-3A, CL-601-3R, and CL-604 Variants) airplanes. This AD requires repetitive inspections for fractured or incorrectly oriented fasteners on the inboard flap hinge-box forward fittings on both wings, and fastener replacement if necessary. This AD was prompted by two reports of fractured fastener heads found on the inboard flap hinge-box forward fitting. We are issuing this AD to detect and correct incorrectly oriented or fractured fasteners, which could result in detachment of the flap hinge-box and the flap surface, and consequent reduced controllability of the airplane.
Within 100 flight cycles after the effective date of this AD: Do a detailed visual inspection for incorrect orientation and any fracturing (missing fastener heads) of each inboard flap fastener of the hinge-box forward fitting at WS 76.50 and WS 127.25, on both wings, in accordance with the Accomplishment Instructions of the applicable service information identified in paragraphs (g)(1) through (g)(4) of this AD.
(1) For Model CL-600-1A11 (CL-600) airplanes having S/Ns 1004 through 1085 inclusive: Bombardier Alert Service Bulletin A600-0763, including Appendices 1 and 2, dated September 26, 2013.
(2) For Model CL-600-2A12 (CL-601) airplanes having S/Ns 3001 through 3066 inclusive, and Model CL-600-2B16 (CL-601-3A and CL-601-3R Variants) airplanes having S/Ns 5001 through 5194 inclusive: Bombardier Alert Service Bulletin A601-0627, including Appendices 1 and 2, dated September 26, 2013.
(3) For Model CL-600-2B16 (CL-604 Variant) airplanes having S/Ns 5301 through 5665 inclusive: Bombardier Alert Service Bulletin A604-57-006, Revision 01, dated September 26, 2013, including Appendices 1 and 2, dated September 26, 2013.
(4) For Model CL-600-2B16 (CL-604 Variant) airplanes having S/Ns 5701 through 5920 inclusive: Bombardier Alert Service Bulletin A605-57-004, Revision 01, dated September 26, 2013, including Appendices 1 and 2, dated September 26, 2013.
If all fasteners are found correctly oriented and not fractured (intact) during any inspection required by paragraph (g) of this AD, no further action is required by this AD.
If any fastener is found fractured (missing fastener head) during any inspection required by paragraph (g) of this AD: Before further flight, remove and replace all fractured fasteners and all incorrectly oriented forward and aft fasteners at WS 76.50 and WS 127.25, on both wings, in accordance with the Accomplishment Instructions of the applicable service information identified in paragraphs (g)(1) through (g)(4) of this AD. After accomplishing the replacement required by this paragraph, no further action is required by this AD.
If any fastener is found incorrectly oriented but none are found to be fractured (fasteners found intact) during any inspection required by paragraph (g) of this AD: Repeat the inspection required by paragraph (g) of this AD thereafter at intervals not to exceed 100 flight cycles until the terminating action specified in paragraph (k) of this AD is accomplished.
Replacement of all incorrectly oriented forward and aft fasteners at WS 76.50 and WS 127.25, on both wings, in accordance with the Accomplishment Instructions of the applicable service information identified in paragraphs (g)(1) through (g)(4) of this AD, terminates the requirements of paragraph (j) of this AD.
