Landing Gear — Nose Landing Gear — Nose Wheel Steering Selector Valve Slow to Deactivate
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of Bombardier BD-100-1A10 aircraft with serial numbers 20003 through 20892 must replace the SSV P/N 41130-107 with the new P/N 41130-111 within 36 months from 2021-09-01. After replacement, they must perform the required testing as specified in the applicable Bombardier service bulletins SB 100-32-35 or SB 350-32-011 dated 30 March 2021. Installation of the old SSV P/N 41130-107 is prohibited from the effective date.
Summary
Canadian Airworthiness Directive CF-2021-29 addresses an issue with the nose wheel steering selector valve (SSV) on Bombardier Inc. model BD-100-1A10 aeroplanes, serial numbers 20003 through 20892. The directive mandates replacing the affected SSV part number 41130-107 with a redesigned part number 41130-111 to prevent slow deactivation under low temperature conditions. This AD aims to enhance safety by reducing the risk of runway excursions caused by delayed transition to free castor mode.
What changed
CF-2021-29 introduces a requirement to replace the nose wheel steering selector valve P/N 41130-107 with the redesigned P/N 41130-111 within 36 months of the effective date. It also prohibits the installation of the older SSV P/N 41130-107 on the affected Bombardier BD-100-1A10 aircraft from the effective date onward. Additionally, it mandates testing of the new valve following installation according to Bombardier service bulletins.
Why it matters
This directive is critical for operators and maintenance organizations to prevent potential runway excursions caused by slow deactivation of the nose wheel steering valve in cold conditions. Compliance ensures safer ground handling and steering control during taxi and takeoff. It also helps maintain regulatory compliance under Canadian Aviation Regulations and avoids operational disruptions or grounding due to non-compliance.
More for Bombardier BD-100
All 41- EASA AD CF-2025-58Time Limits/Maintenance Checks (TLMC) — Airworthiness Limitations (AWL)Nov 14, 2025
- EASA AD CF-2025-42Flight Controls — Horizontal Stabilizer — Autopilot Inability to Trim Horizontal StabilizerAug 28, 2025
- EASA SIB CASA-2025-03Flight Controls — Unannunciated Loss of Ground Lift Dump Spoilers due to Faulty Throttle Quadrant AssemblyApr 9, 2025
- EASA AD CF-2024-38Flight Controls — Horizontal Stabilizer Trim Actuator (HSTA) — Incomplete OverhaulNov 15, 2024
Get the next one by email
New ADs and bulletins for Bombardier BD-100, summarized like this page, every Monday.