EASA AD CF-2023-48R1
Indicating / Recording System — Misleading Pitch Trim Indication and Alerting for Take-off
Summary
Canadian Airworthiness Directive CF-2023-48R1 addresses misleading pitch trim indication and alerting issues for take-off on Bombardier BD-100-1A10 Challenger 300 and 350 aircraft, serial numbers 20003 to 20936. The directive mandates updates to the Airplane Flight Manual (AFM) procedures to ensure correct horizontal stabilizer positioning during take-off. This revision updates aircraft applicability and corrects references from Non-Normal to Normal AFM procedures.
What Changed
CF-2023-48R1 revises the previous AD CF-2023-48 by expanding the affected aircraft serial numbers and correcting procedural references in the AFM from Non-Normal to Normal procedures for both Challenger 300 and 350 models. It also clarifies the required Temporary Revisions to the AFM for compliance.
Why It Matters
This directive is critical for operators and maintenance teams to prevent incorrect horizontal stabilizer settings at take-off, which could lead to loss of aircraft control. Ensuring updated AFM procedures are incorporated and flight crews are informed enhances flight safety and regulatory compliance. It also affects maintenance planning and documentation updates.
What To Do
Operators must amend the Transport Canada approved AFM by incorporating the specified Temporary Revisions within 60 days from the effective date of 13 October 2023. Flight crews must be advised of the changes and operate the aircraft according to the updated procedures. Compliance with CAR 605.84 regarding ADs is mandatory before conducting take-off.
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