Landing Gear — Nose Wheel Steering System — Electronic Control Module Filter Plate Connector Failure
- Published
- Effective
- Deadline
- Replaces
- 2023-14
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must verify aircraft technical records or inspect the ECM serial numbers within 24 months from 14 March 2023 to identify affected units. If non-compliant ECMs are found, they must be removed and replaced within the same 24-month period. Additionally, installation of affected ECMs without proper re-identification is prohibited from 14 March 2023 onward.
Summary
Airworthiness Directive CF-2023-14R1 addresses the failure risk of the electronic control module (ECM) filter plate connector in the nose wheel steering system of Bombardier CL-600-2B16 aircraft, specifically models Challenger 604, 605, and 650 with certain serial numbers. The directive mandates verification, inspection, and replacement of affected ECMs to prevent un-commanded steering or runway excursions. It applies to ECM part number 601-86100-27 installed on aircraft serial numbers 5301 through 5665, 5701 through 5990, and 6050 and subsequent.
What changed
This revision CF-2023-14R1 clarifies the applicability of the original AD CF-2023-14 issued on 28 February 2023. It provides detailed instructions on verifying technical records, inspecting ECM serial numbers, and replacing non-compliant ECMs. The revision also explicitly prohibits installation of affected ECMs unless re-identified with SB-1 on the nameplate.
Why it matters
This directive is critical for aviation professionals to ensure the safety and reliability of the nose wheel steering system on affected Bombardier aircraft. Failure to comply could lead to un-commanded steering events or runway excursions, posing serious operational hazards. Operators, maintenance organizations, and compliance teams must track affected ECM serial numbers and adhere to replacement and testing requirements to maintain airworthiness.
More for Bombardier CL-600 (Challenger)
All 47- EASA AD CF-2026-41Time Limits/Maintenance Checks – Airworthiness Limitations – AmendmentAug 24, 2026
- EASA AD CF-2025-51R1Flight Controls — Uncommanded and Unarrested Flap MovementDec 2, 2025
- EASA AD CF-2025-36Fuselage, Stabilizers, Wings, Exhaust SystemJul 9, 2025
- EASA AD CF-2025-06Auxiliary Power Unit (APU) — APU Muffler Drainage Blockage Causing Fuel Leakage AccumulationJan 27, 2025
- EASA AD CF-2025-05Landing Gear — Uncommanded Steering
Get the next one by email
New ADs and bulletins for Bombardier CL-600 (Challenger), Challenger 604, Challenger 605 and Challenger 650, summarized like this page, every Monday.