Airworthiness directives › 2025-02-01
AD 2025-02-01 Airworthiness Directives; Bombardier, Inc., Airplanes
Models named: BD-100-1A10. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to Bombardier, Inc., Model BD-100-1A10 airplanes, certificated in any category, serial numbers 20003 through 20500 inclusive and 20501 through 20936 inclusive.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Within 3,000 flight hours or 5 years, whichever occurs first, from the effective date of this AD, install the pitch/roll trim switch relays, in accordance with sections 2.B. and 2.C. of the Accomplishment Instructions of the applicable material specified in paragraph (g)(1) or (2) of this AD. (1) Bombardier Service Bulletin 100-27-22, dated December 29, 2022 (for airplane serial numbers 20003 through 20500 inclusive). (2) Bombardier Service Bulletin 350-27-012, dated December 29, 2022 (for airplane serial numbers 20501 through 20936 inclusive).
Unsafe condition
This AD was prompted by uncommanded horizontal stabilizer motion during several in-service events caused by a problem with the trim switch wiring. The FAA is issuing this AD to address the problem with the trim switch wiring. The unsafe condition, if not addressed, could result in increased crew workload and reduced safety margins, and if the flightcrew is unable to regain control of the horizontal stabilizer, would result in loss of control of the airplane and high control forces.
Affected ADs
None.
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1