Airworthiness DirectiveEASA AD CF-2020-53

Time Limits / Maintenance Checks — Maintenance Program

Published: Dec 8, 2020
Effective: Dec 21, 2020
Deadline: Jun 19, 2021

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What to do

Affected operators must revise their approved maintenance schedules within 180 days from the directive's effective date to incorporate the mandatory requirements listed in Service Bulletin 670BA-05-001. They must also complete all maintenance and replacement tasks before reaching the new or revised thresholds specified in the Maintenance Requirements Manual Revision 23 or later. Operators should follow the MRM Part 2 content if discrepancies exist between the service bulletin and the manual at the time of compliance.

Summary

The Canadian Airworthiness Directive CF-2020-53 is a regulatory document addressing time limits and maintenance checks for MHI RJ Aviation ULC aeroplanes, specifically models CL-600-2C10, CL-600-2C11, CL-600-2D15, CL-600-2D24, and CL-600-2E25. It mandates updates to the maintenance program to incorporate mandatory airworthiness limitations and safe life component requirements as defined in the Customer Support Publication B-053 Maintenance Requirements Manual. This directive ensures continued airworthiness and safety compliance for the affected aircraft.

What changed

This directive introduces a requirement for operators to revise their approved maintenance schedules to include new or revised instructions from Service Bulletin 670BA-05-001, reflecting updates in the Maintenance Requirements Manual Revision 23 and later. It addresses discrepancies where some mandatory tasks may not have been incorporated into operator maintenance programs. The directive enforces compliance with updated thresholds and intervals for inspections and life-limited parts replacement.

Why it matters

Compliance with CF-2020-53 is critical for aviation professionals to maintain aircraft safety and regulatory conformity. Operators and maintenance organizations must ensure that all mandatory maintenance tasks and life-limited part replacements are performed according to the latest approved schedules to prevent unsafe conditions. This directive helps avoid potential safety risks arising from outdated or incomplete maintenance programs.

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