Airworthiness Directive · Amendment 39-17930 · Autopilot system
Bombardier, Inc. Airplanes
This AD applies to Bombardier, Inc. Model CL-600-2B16 (CL-604 Variant) airplanes, certificated in any category, serial numbers (S/Ns) 5301 through 5665 inclusive, and 5701 and subsequent.
We are adopting a new airworthiness directive (AD) for certain Bombardier, Inc. Model CL-600-2B16 (CL-604 Variant) airplanes. This AD was prompted by reports of in-flight uncommanded rudder movements. This AD requires revising the airplane flight manual (AFM) to incorporate an uncommanded yaw motion procedure. We are issuing this AD to prevent in- flight uncommanded rudder movements, which could lead to structural failure and subsequent loss of the airplane.
Within 30 days after the effective date of this AD, revise the Emergency Procedures Section of the applicable Bombardier AFM to incorporate the uncommanded yaw motion procedure specified in paragraph (g)(1) or (g)(2) of this AD, as applicable.
(1) For Model CL-600-2B16 (CL-604 Variant) airplanes having S/Ns 5301 through 5665 inclusive: Procedure 1.C., Uncommanded Yaw Motion, of Section 03-06, Automatic Flight Control System, of Chapter 3—Emergency Procedures, of the Bombardier Challenger CL-604 AFM, PSP 604-1, Revision 89, dated July 8, 2013.
(2) For Model CL-600-2B16 (CL-604 Variant) airplanes having S/Ns 5701 and subsequent: Procedure 1.C., Uncommanded Yaw Motion, of Section 03-06, Automatic Flight Control System, of Chapter 3—Emergency Procedures, of the Bombardier Challenger CL-605 AFM, PSP 605-1, Revision 25, dated July 8, 2013.
