AD 2016-15-07 Airworthiness Directives; Bombardier, Inc. Airplanes

This AD applies to the airplanes, certificated in any category, identified in paragraphs (c)(1), (c)(2), (c)(3), and (c)(4) of this AD. (1) Bombardier, Inc. Model CL-600-2C10 (Regional Jet Series 700, 701, & 702) airplanes, serial numbers 10002 through 10342 inclusive. (2) Bombardier, Inc. Model CL-600-2D15 (Regional Jet Series 705) airplanes, serial numbers 15001 through 15361 inclusive. (3) Bombardier, Inc. Model CL-600-2D24 (Regional Jet Series 900) airplanes, serial numbers 15001 through 15361 inclusive. (4) Bombardier, Inc. Model CL-600-2E25 (Regional Jet Series 1000) airplanes, serial numbers 19001 through 19041 inclusive.

Comply with this AD within the compliance times specified, unless already done.

Within the compliance times specified in paragraph (g)(1), (g)(2), or (g)(3) of this AD, as applicable: Replace the slat and flap torque tubes in the slat and flap control system with new or modified slat and flap torque tubes, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 670BA-27-067, Revision A, dated February 23, 2015. (1) For airplanes that have accumulated 28,000 total flight hours or less as of the effective date of this AD, or 137 months or less since the date of issuance of the original Canadian certificate of airworthiness or date of issuance of the original Canadian export certificate of airworthiness as of the effective date of this AD: Before the accumulation of 34,000 total flight hours or within 167 months since the date of issuance of the original Canadian certificate of airworthiness or date of issuance of the original Canadian export certificate of airworthiness, whichever occurs first. (2) For airplanes that have accumulated more than 28,000 total flight hours but not more than 36,000 total flight hours as of the effective date of this AD, and more than 137 months but not more than 176 months since the date of issuance of the original Canadian certificate of airworthiness or date of issuance of the original Canadian export certificate of airworthiness as of the effective date of this AD: At the earlier of the times specified in paragraphs (g)(2)(i) and (g)(2)(ii) of this AD. (i) Within 6,000 flight hours or 30 months, whichever occurs first, after the effective date of this AD. (ii) Before the accumulation of 38,000 total flight hours, or within 186 months since the date of issuance of the original Canadian certificate of airworthiness or date of issuance of the original Canadian export certificate of airworthiness, whichever occurs first. (3) For airplanes that have accumulated more than 36,000 total flight hours as of the effective date of this AD, or more than 176 months since the date of issuance of the original Canadian certificate of airworthiness or date of issuance of the original Canadian export certificate of airworthiness as of the effective date of this AD: Within 2,000 flight hours or 10 months, whichever occurs first, after the effective date of this AD.

This AD was prompted by reports of corrosion found on the slat and flap torque tubes in the slat and flap control system. We are issuing this AD to prevent rupture of a corroded slat or flap torque tube. This condition could result in an inoperative slat or flap system and consequent reduced controllability of the airplane.

None.