Airworthiness Directive · Amendment 39-21531 · Flight controls
Bombardier, Inc., Airplanes
This AD applies to Bombardier, Inc., Model BD-100-1A10 airplanes, certificated in any category, serial numbers 20003 through 20457 inclusive, and 20501 through 22999 inclusive.
The FAA is adopting a new airworthiness directive (AD) for certain Bombardier, Inc., Model BD-100-1A10 airplanes. This AD was prompted by a report that the inboard multi-function spoiler (MFS) surfaces failed to deploy, which was caused by missing notches on the piston seal of the MFS power control units (PCUs). This AD requires an inspection to determine if affected MFS PCUs are installed, and replacement of affected MFS PCUs. The FAA is issuing this AD to address the unsafe condition on these products.
For the purpose of this AD, an affected MFS PCU is an MFS PCU that has a serial number of 0001 through 1410 inclusive, except for those MFS PCUs having the serial numbers listed in figure 1 to paragraph (g) of this AD and except for those with the suffix “A” at the end of the serial number (i.e., serial number 1025A).
(1) Within 12 months after the effective date of this AD: Do an inspection to determine if affected MFS PCUs are installed on the airplane in accordance with Paragraph 2.B. of Bombardier Service Bulletin 100-27-17, Revision 03, dated June 19, 2020; or Bombardier Service Bulletin 350-27-010, dated June 19, 2020; as applicable. A review of airplane maintenance records is acceptable in lieu of this inspection if the serial number of the MFS PCU can be conclusively determined from that review.
(2) Within 12 months after the effective date of this AD: Replace any affected MFS PCUs with MFS PCUs that are not affected, in accordance with Paragraphs 2.C., 2.D., 2.E., and 2.F., as applicable, of Bombardier Service Bulletin 100-27-17, Revision 03, dated June 19, 2020; or Bombardier Service Bulletin 350-27-010, dated June 19, 2020; as applicable.
