AD 2021-08-11 Requires Revising The Existing Maintenance Or Inspection Program

The FAA is adopting a new airworthiness directive (AD) for certain Bombardier, Inc., Model BD-700-1A10 and BD-700-1A11 airplanes.

This AD was prompted by reports of one or both roll control input modules (RCIMs) being incorrectly installed. This AD requires revising the existing maintenance or inspection program, as applicable, to incorporate certain aircraft maintenance manual (AMM) tasks. The FAA is issuing this AD to address the unsafe condition on these products. This AD becomes effective April 27, 2021.

Supplementary Information: Transport Canada Civil Aviation (TCCA), which is the aviation authority for Canada, has issued TCCA AD CF-2020-35, dated October 7, 2020 (referred to after this as the Mandatory Continuing Airworthiness Information, or the MCAI), to correct an unsafe condition for certain Bombardier, Inc., Model BD-700-1A10 and BD-700-1A11 airplanes. You may examine the MCAI at https://www.regulations.gov by searching for and locating Docket No. FAA-2021-0268.

This AD was prompted by reports of one or both RCIMs being incorrectly installed. An investigation determined that it is physically possible for an RCIM to be installed and zeroed at 180 degrees from its intended orientation. One in-service report involved a near-accident with damage
incurred on the airplane at landing. The FAA is issuing this AD to prevent incorrect installation of one or both RCIMs, which results in a misrigging condition, causing the multi-function spoilers to deploy opposite to the roll command, and could lead to loss of control of the airplane. See the MCAI for additional background information.

FMI: www.regulations.gov