AD 2021-10-26 Prompted By Reports Of DC Motor Pump (DCMP) Failures

The FAA is adopting a new airworthiness directive (AD) for certain Bombardier, Inc., Model BD-100-1A10 airplanes.

This AD was prompted by reports of DC motor pump (DCMP) failures during production flight tests. This AD requires installing a redesigned DCMP electric motor assembly. The FAA is issuing this AD to address the unsafe condition on these products. This AD is effective July 6, 2021.

Supplementary Information: Transport Canada Civil Aviation (TCCA), which is the aviation authority for Canada, has issued TCCA AD CF-2020-31, dated September 23, 2020 (TCCA AD CF-2020-31) (also referred to as the Mandatory Continuing Airworthiness Information, or the MCAI), to correct an unsafe condition for certain Bombardier, Inc., Model BD-100-1A10 airplanes. You may examine the MCAI in the AD docket on the internet at www.regulations.gov by searching for and locating Docket No. FAA2021-0097.

The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 by adding an AD that would apply to certain Bombardier, Inc., Model BD-100-1A10 airplanes. The NPRM published in the Federal Register on February 24, 2021 (86 FR 11163). The NPRM was prompted by reports of DCMP failures during production flight tests. The NPRM proposed to require installing a redesigned DCMP electric motor assembly. The FAA is issuing this AD to address failures of the DCMP and electrical system generators, which could lead to the loss of normal electrical power on the airplane. See the MCAI for additional background information.

FMI: www.regulations.gov