Indicating/Recording System – Misleading Caution Messages Posted on Engine Indicating and Crew Alerting System during Air Driven Generator Deployment
- Published
- Effective
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Affected operators must amend the AFM as specified in CF-2026-25 by inserting the provided figures or the directive itself within 60 days of the effective date. Flight crews must be informed of these changes and operate the aircraft according to the updated emergency procedures. Compliance with CAR 605.84 regarding ADs must be ensured before conducting take-offs.
Summary
Canadian Airworthiness Directive CF-2026-25 addresses misleading caution messages displayed on the Engine Indicating and Crew Alerting System (EICAS) during Air Driven Generator (ADG) deployment in MHI RJ Aviation ULC aircraft models CL-600-2C10, CL-600-2C11, CL-600-2D15, CL-600-2D24, and CL-600-2E25. The directive mandates updates to the Aircraft Flight Manual (AFM) to correct message logic and clarify procedures during emergency power conditions.
What changed
This new Airworthiness Directive introduces amendments to Chapter 3 of the AFM, specifically updating emergency procedures for double engine failure, emergency power only, and loss of all AC power scenarios. It adds instructions to engage the MACH TRIM switch and clarifies that certain caution messages such as STALL FAIL and PITCH FEEL require no crew action, preventing unnecessary performance corrections.
Why it matters
The directive prevents pilots from reacting to false caution messages during ADG deployment, which could otherwise lead to unnecessary diversions or runway excursions. For operators and maintenance teams, this ensures safer flight operations and compliance with regulatory requirements by aligning aircraft manuals with actual system behavior under emergency power conditions.
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