Airworthiness Directive · Amendment 39-9344 · Bombardier Inc. Airplanes
Bombardier Inc. Airplanes
This AD applies to Bombardier Inc. CL-600-1A11 (CL-600), CL-600-2A12 (CL-601), CL-600-2B16 (CL-601-3A), CL-600-2B16 (CL-601-3R).
The models as the FAA's AD index lists them. The serial ranges, installed parts and exceptions are in the AD itself: read it at the FAA.
This amendment adopts a new airworthiness directive (AD) that is applicable to certain Bombardier Model CL-600-1A11, CL-600-2A12, and CL-600-2B16 series airplanes. This action requires functional testing of the brake of the horizontal stabilizer trim actuator (HSTA); and exercising the pitch trim system, revising the FAA-approved Airplane Flight Manual (AFM), operational testing of the HSTA, and replacing the HSTA or horizontal stabilizer trim control unit, if necessary. This amendment is prompted by reports of overspeed annunciation of the pitch trim due to slippage of the no-back device on the HSTA. The actions specified in this AD are intended to prevent uncommanded movement of the HSTA due to failure of the no-back device on the HSTA to operate properly; this condition could adversely affect the controllability of the airplane.
