Cockpit Displays - Cooling Air Filter - Non-compliance to Flammability Requirements
- Published
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators should replace the cockpit display cooling air filter with the new P/N 601R96761-7 during the next scheduled MRB task or sooner if on-condition findings such as clogging or poor airflow occur. They must also remove all stock of the old filter P/N 601R96761-1 to prevent inadvertent installation. Compliance should follow the specified AMM tasks and service bulletins referenced in the alert.
Summary
Transport Canada Civil Aviation Safety Alert CASA 2025-01 addresses a non-compliance issue related to the flammability testing of the cockpit displays cooling air filter Part Number 601R96761-1 installed on MHI RJ Aviation (MHIRJ) CL-600 series aeroplanes. The affected aircraft models include CL-600-2B19, CL-600-2C10, CL-600-2C11, CL-600-2D15, CL-600-2D24, and CL-600-2E25. This alert informs operators and maintenance personnel about the issue and provides guidance on the correct replacement filters and maintenance procedures.
What changed
This alert introduces the requirement to replace the non-compliant filter P/N 601R96761-1 with the new fully compliant filter P/N 601R96761-7 during scheduled maintenance or when on-condition replacements are necessary. It also recommends purging existing stock of the older non-compliant filters. The alert clarifies the applicable Maintenance Review Board (MRB) tasks and Aircraft Maintenance Manual (AMM) procedures for filter replacement.
Why it matters
The flammability non-compliance of the existing filter poses a potential safety risk in the cockpit avionics cooling system, which is located near critical components such as oxygen lines and electrical harnesses. Ensuring the use of compliant filters helps maintain fire safety standards and prevents the use of potentially hazardous parts. This is critical for operators, maintenance organizations, and compliance teams to uphold airworthiness and safety regulations.
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