Flight Controls — Horizontal Stabilizer Trim Switch — Unintended Horizontal Stabilizer Motion
- Published
- Effective
- Deadline
- Replaces
- 2022-03
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must update the applicable Bombardier BD-100-1A10 (Challenger 300/350) aircraft flight manuals with the specified procedures and temporary revisions approved by Transport Canada within 30 days of May 19, 2023. Flight crews must be informed and trained to familiarize themselves with the malfunction procedures before their first flight of the day. A copy of this airworthiness directive must be inserted into the flight manual for ongoing reference.
Summary
Flight Controls — Horizontal Stabilizer Trim Switch — Unintended Horizontal Stabilizer Motion is a Canadian Airworthiness Directive (CF-2022-03R1) addressing an issue with Bombardier BD-100-1A10 (Challenger 300/350) aircraft. It concerns unintended horizontal stabilizer movements following a STAB TRIM FAULT advisory and autopilot disengagement, which can lead to increased pilot workload and reduced safety margins. The directive mandates updates to flight manuals and procedures to mitigate this risk.
What changed
This revision replaces the original CN CF-2022-03 issued on February 1, 2022, clarifying the location of revised procedures related to abnormal advisory messages. It mandates the incorporation of updated or temporary revisions to the aircraft flight manuals and the introduction of extended pre-flight pitch trim checks and malfunction procedures to address the unintended stabilizer motion.
Why it matters
This directive is critical for operators and maintenance teams as it addresses a safety risk that can compromise aircraft controllability and increase pilot workload. Proper compliance ensures that flight crews are prepared to recognize and manage stabilizer trim faults effectively, maintaining safe flight operations and regulatory 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.