Communication — Cockpit Voice Recorder (CVR) — Impact Switch Found Installed in Wrong Direction
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of affected MHIRJ CL-600 series aircraft must inspect the CVR inertia switch installation within 12 months from the directive's effective date of October 30, 2024. If the switch is not oriented forward, it must be reinstalled correctly following the maintenance manual task 23-71-10-400-801. Compliance with these actions is mandatory before further flight.
Summary
Canadian Airworthiness Directive CF-2024-35 addresses an issue with the Cockpit Voice Recorder (CVR) impact switch installed in the wrong direction on Mitsubishi Heavy Industries RJ Aviation ULC (MHIRJ) aircraft models CL-600-2C10, CL-600-2C11, CL-600-2D15, CL-600-2D24, and CL-600-2E25. The directive mandates inspection and correction of the inertia switch installation to ensure proper orientation. This affects all serial numbers of the specified aircraft models.
What changed
CF-2024-35 introduces a new requirement to inspect the installation of the CVR inertia switch, part number 3L0-453-2, to verify it is oriented correctly according to the aircraft maintenance manual task 23-71-10-400-801. If the switch is found installed incorrectly, it must be repositioned to face forward as specified. This directive is a new regulation addressing a production installation error.
Why it matters
Proper installation of the CVR inertia switch is critical because it cuts power to the CVR in the event of an accident, preventing data overwrite. Incorrect installation could result in loss of vital cockpit voice recordings, hindering accident investigation and safety improvements. Operators and maintenance teams must ensure compliance to maintain data integrity and support aviation safety.
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