Landing Gear — Brake Control System — Uncommanded Brake Pressure due to Brake Control Unit Failure
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must inspect their aircraft within 48 months from 2022-09-22 to determine if the affected BCU part number GW415-7125-7 is installed. If found, they must replace it with part number GW415-7125-9 following Bombardier Service Bulletins. Additionally, installation of the affected BCU is prohibited from the effective date onward.
Summary
Canadian Airworthiness Directive CF-2022-53 addresses an issue with the landing gear brake control system on Bombardier BD-700-1A10 and BD-700-1A11 aircraft models. The directive targets uncommanded brake pressure caused by a failure in the Brake Control Unit (BCU), which can lead to tire bursts and braking difficulties. It mandates inspection and replacement of affected BCUs to ensure safe braking performance.
What changed
CF-2022-53 introduces a requirement to replace the Brake Control Unit part number GW415-7125-7 with a new part number GW415-7125-9 that grounds residual current in case of a 5V power supply failure. It also prohibits installation of the affected BCU part number on the specified aircraft models. This is a new regulation responding to an identified safety issue.
Why it matters
This directive is critical for operators and maintenance teams to prevent uncommanded brake pressure that can cause tire bursts, unexpected deceleration, and degraded braking performance. Compliance ensures continued airworthiness and safety of Bombardier BD-700-1A10 and BD-700-1A11 aircraft, reducing risks during landing operations. It also helps maintain regulatory compliance under Canadian Aviation Regulations.
More for Bombardier BD-700
All 79- EASA SIB CASA-2026-02Insufficient Clearance Between Engine Fuel-Feed Line and Collector Tank Upper Skin StringerMar 18, 2026
- EASA SIB CASA-2026-01Spoiler Spigot Shim Missing at Multifunction Spoiler Actuator InstallationFeb 26, 2026
- EASA AD CF-2026-02Fuselage Structure — Aft Pressure Bulkhead Stiffener Found CrackedJan 16, 2026
- EASA AD CF-2025-56Equipment/Furnishings — Structural Degradation of Galley Panel AssembliesNov 20, 2025
- EASA AD CF-2025-57
Get the next one by email
New ADs and bulletins for Bombardier BD-700, summarized like this page, every Monday.